Internet DRAFT - draft-guy-xfsp
draft-guy-xfsp
Internet Engineering Task Force M. Spencer
Internet-Draft Avilution
Intended status: Informational E.T. Guy, Ed.
Expires: 3 February 2024 EMC Software
2 August 2023
eXtensible Stateless Equipment Data Exchange
draft-guy-xfsp-01
Abstract
This document presents a binary IP-based protocol to facilitate
interoperable communications between avionics equipment. The
protocol is UDP-based, stateless, and broadcast. Messages consist of
a common header followed by a series of parameters and related
attributes. The parameters are always informational, e.g.,
indicating airspeed is 150 kts, but parameter attributes can be set
to indicate intent, e.g., this parameter contains a new user selected
value such as an instruction that deploys the landing gear.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on 3 February 2024.
Copyright Notice
Copyright (c) 2023 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents (https://trustee.ietf.org/
license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document. Code Components
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extracted from this document must include Revised BSD License text as
described in Section 4.e of the Trust Legal Provisions and are
provided without warranty as described in the Revised BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Basic Properties . . . . . . . . . . . . . . . . . . . . 4
1.2. Drawbacks . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3. Terminology . . . . . . . . . . . . . . . . . . . . . . . 5
2. Overview of XSEDE Protocol . . . . . . . . . . . . . . . . . 6
3. Message Format . . . . . . . . . . . . . . . . . . . . . . . 7
3.1. Message Header . . . . . . . . . . . . . . . . . . . . . 7
3.1.1. Message Header Dictionaries . . . . . . . . . . . . . 8
3.2. Message Parameter Format . . . . . . . . . . . . . . . . 10
3.2.1. Parameter Header Dictionaries . . . . . . . . . . . . 11
3.2.2. Expire Encoding . . . . . . . . . . . . . . . . . . . 13
3.3. Parameter Attribute Formats . . . . . . . . . . . . . . . 14
3.3.1. BOOL Parameter Format . . . . . . . . . . . . . . . . 14
3.3.2. UINT Parameter Format . . . . . . . . . . . . . . . . 14
3.3.3. WAYPOINT Parameter Format . . . . . . . . . . . . . . 15
3.3.4. STRING Parameter Format . . . . . . . . . . . . . . . 20
3.3.5. CASMSG Parameter Format . . . . . . . . . . . . . . . 20
3.3.6. SINT Parameter Format . . . . . . . . . . . . . . . . 23
3.3.7. BUS Parameter Format . . . . . . . . . . . . . . . . 23
3.3.8. RANGE Parameter Format . . . . . . . . . . . . . . . 26
3.3.9. GPIO Parameter Format . . . . . . . . . . . . . . . . 28
3.3.10. APP Parameter Format . . . . . . . . . . . . . . . . 29
3.3.11. WBRANGE Parameter Format . . . . . . . . . . . . . . 32
3.3.12. UPDATE Parameter Format . . . . . . . . . . . . . . . 32
3.3.13. SERVO Parameter Format . . . . . . . . . . . . . . . 33
3.3.14. DBASE Parameter Format . . . . . . . . . . . . . . . 34
3.4. Parameter Ranges . . . . . . . . . . . . . . . . . . . . 35
3.4.2. Ranges . . . . . . . . . . . . . . . . . . . . . . . 36
3.5. Parameter Types . . . . . . . . . . . . . . . . . . . . . 38
4. Message Transport . . . . . . . . . . . . . . . . . . . . . . 96
4.1. Message Composition . . . . . . . . . . . . . . . . . . . 96
4.2. Message Signing . . . . . . . . . . . . . . . . . . . . . 96
4.3. Message Transmission and Reliability . . . . . . . . . . 96
4.4. Message Reception & decoding . . . . . . . . . . . . . . 97
4.5. Message Signing . . . . . . . . . . . . . . . . . . . . . 97
5. Example Message Flows . . . . . . . . . . . . . . . . . . . . 97
5.1. Adjust radio . . . . . . . . . . . . . . . . . . . . . . 97
5.1.1. Message Header . . . . . . . . . . . . . . . . . . . 97
5.1.2. Frequency Message Header . . . . . . . . . . . . . . 98
5.1.3. Squelch Message Header . . . . . . . . . . . . . . . 100
5.1.4. Radio Status Report . . . . . . . . . . . . . . . . . 101
5.2. Deploy Landing Gear Example . . . . . . . . . . . . . . . 102
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5.2.1. Initial Gear State Message . . . . . . . . . . . . . 102
5.2.2. Gear Position Request . . . . . . . . . . . . . . . . 105
5.2.3. First Changed Gear State Message . . . . . . . . . . 107
5.2.4. Final Gear State Message . . . . . . . . . . . . . . 110
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 113
7. Security Considerations . . . . . . . . . . . . . . . . . . . 113
7.1. Interception . . . . . . . . . . . . . . . . . . . . . . 114
7.2. Impersonation and MITM . . . . . . . . . . . . . . . . . 114
7.3. Denial of Service . . . . . . . . . . . . . . . . . . . . 114
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 114
8.1. Normative References . . . . . . . . . . . . . . . . . . 114
8.2. Informative References . . . . . . . . . . . . . . . . . 115
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 115
1. Introduction
Historically, avionics equipment has used private protocols for
device interconnection but the trend is towards open communication
leveraging standard hardware. There have been various stages in the
evolution of device interconnection from point-to-point analog
communication to digital serial protocols, to bus-based solutions and
currently IP-based over ethernet.
One of the concerns with all of these protocols in this industry is
that extensive testing is required, so developing a common protocol
and library with its extensive test cases will improve time to
market, product quality, and hence lower cost and improved safety.
The eXtensible Stateless Equipment Data Exchange, XSEDE, is such an
IP-based protocol which provides a common means that facilitates
parameter communication between airborne equipment. It is an open
protocol which operates using binary-encoded UDP packets sent on a
broadcast interface, typically using multicast Ethernet. This
approach allows the avionics system to function as a collection of
safety-critical microservices with XSEDE at the hub of the entire
avionics system. XSEDE can flexibly drive multiple displays and
unify all the aircraft's subsystems all at the control of the system
integrator.
Parameters generally fall into two separate categories: schedule-
driven and event-driven. Schedule-driven parameters are those that
are sent periodically by the nodes in the system. One example could
be the current heading might be reported by a sensors at 10hz. These
parameters have a logical expiration time associated with how long
they are valid, for example, 250ms. Another example could be the
current air temperature or even the current value of the pilot’s
desired heading (heading bug.) Event driven parameters are those
that occur in response to an external stimuli, e.g., a pilot action
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on a switch, or an autopilot deciding to change the heading due to
reaching an intermediate waypoint. These parameters do not have a
logical expiration time associated with how long they are valid.
1.1. Basic Properties
XSEDE is a simple and compact protocol which uses a fast marshaling
approach. Parameters may be coalesced, size and time permitting,
into a single message to make transport more efficient. The message
layout considers quad word alignment issues which can affect
performance, especially on ARM-based architectures and pads to
maintain efficiency. All messages are broadcast to all receivers so
that the protocol is stateless and only the recipient controls
whether a parameter will be processed. Since avionics software is
subject to intensive testing and validation, XSEDE is designed to be
deterministic with the fewest number of formal requirements required
for implementation while still permitting the addition of new data
formats and parameters through an extensible data model. Such
additions can be made either through a future version of the standard
or just through localized additionally configured data elements.
User and System selected events can exhibit two distinct behaviors:
an event that cause an immediate change, e.g., a radio frequency
change, and those changes in which a change may take time to be
reflected by the system, e.g., selecting a new flap position. In the
former case, only one parameter is defined: a request would set the
confidence field to USERSEL (or SYSSEL). At the same time, the radio
would periodically report with the current setting. In the latter
case, these settings are implemented with a pair of parameters, a
request (REQ suffix) and a current state Parameter that has no
specific suffix. For example, FLAPREQ and FLAPPOS (See Section 3.5)
where the first indicates the requested value and the second
indicates the actual value.
1.2. Drawbacks
XSEDE is a UDP-based protocol so packet delivery is not guaranteed.
However, since XSEDE is typically run on a purpose built network
within a specific aircraft, the reliability of the network is still
typically very high. Application-level behavior is implemented to
ensure critical requests are executed. Since the protocol is
stateless, it relies on the requestor to monitor status to ensure an
action was taken. For example, if a request to put the landing gear
down is made, the requesting application must watch reports of the
landing gear position and alert if the request is not satisfied in a
timely manner. However, you would be able to see if your request was
correctly interpreted by a report, periodic or in response to the
event, by the responsible nodes. Notably, the protocol does not
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contain the concept of incrementing or decrementing a value, just
setting a specific value. A user interface which is designed to
increment and decrement a value based on a user turning a knob, for
example, must track the current value and when an increment is
detected, transmit the new, incremented value with the appropriate
confidence (most likely USERSEL). If two or more applications are
monitoring the same knob from two different computers, they each
would be able to redundantly send the same new value without
affecting the behavior whether one, two or more such applications
were concurrently running.
1.3. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
Message:
is the basic unit of communication in XSEDE.
Node:
is a device or process that implements XSEDE.
Parameter:
is the task specific payload contained in a message.
Attribute Format:
are the simple and structured data types associated with a
parameter attribute.
Attributes:
are the values associated with a parameter.
Dictionary:
is a set of allowed values associated with an attribute,
parameter, or message field.
Source ID:
Refers to the unique number which identifies the node, by
convention with the top octet representing the computer and the
bottom octet representing the application number within that
computer.
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2. Overview of XSEDE Protocol
The eXtensible Stateless Equipment Data Exchange is designed to
operate on an airborne platform network. This network is intended to
be isolated from the general Internet and comprises instruments,
displays, sensors, and actuators performing various functions. XSEDE
messages are broadcast to every node on the network. XSEDE message
occur in three classes: Maintenance, Operational and Raw.
Maintenance and Operational messages consist of a header followed by
a series of parameters. Parameters always represent information, a
message is purely a collection of parameters. However, the
confidence field must be interpreted to determine intent, i.e., the
SYSSEL and USERSEL confidence levels MUST be interpreted by
responsible nodes to affect changes on the relevant items.
XSEDE is stateless. There is no required protocol level response to
any command, however, informational responses may be made. For
instance, a command to change the radio frequency of a certain radio
may generate a application-level response indicating the new radio
frequency. All XSEDE messages go to all nodes which simply discard
things they don't care about.
Raw XSEDE messages consist of a message header which specifies the
length of the raw data, followed by that raw data. Raw data is
classified as MIL-STD-1553, CANbus, digital samples, or other serial
or streaming unframed data.
Each node in XSEDE is assigned a source ID. These Source IDs MUST be
unique within the XSEDE network. The Source ID and the message
number uniquely identify the message and are contained in the message
header. Message IDs created by a node MUST be monotonically
increasing. A receiving node MUST ignore all duplicate messages.
The Source ID and a message number are used to ensure messages are
processed in order and only once. Messages MUST be processed in
order skipping any missing messages and MUST only be processed once.
Senders and Receivers must account for integer overflow in message
numbers. There is no retry mechanism at the protocol level; Missing
and out-of-order messages SHALL be considered lost and if received
out of order, a message MUST be ignored.
In addition to the Source ID and Message Number, The XSEDE message
header also contains the message class, the Message Operation ID,
DO-178 certification level, [DO-178C] the confidence level and the
payload length.
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For best performance, an XSEDE goal is to not send IP datagrams that
have to be fragmented. Packets which exceed the MSS size will be
fragmented. To achieve this goal XSEDE messages SHOULD be less than
the network Maximum Segment Size (MSS) size in length. On a modern
Ethernet network, IEEE 802.3 [IEEE8023] specifies a maximum payload
size of 1500 bytes. The size of the fixed IPv4 header is 20 bytes
[RFC0791] or in IPv6 the fixed header is 40 bytes [RFC2640] UDP
headers consume 8 bytes, [RFC0768] the XSEDE header Section 3.1 uses
12 bytes leaving 1460 bytes for parameters or 1440 bytes on an IPv6
network.
3. Message Format
3.1. Message Header
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| src id | message number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| msg class | message ID | flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| tcid | len |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
...
: Data :
...
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 1: Message Header Format
XSEDE messages are formatted as shown in the above diagram and
consist of the following fields:
src id:
UINT16; locally configured source ID. Must be unique on network.
message number:
UINT16; monotonically increasing message number.
msg class:
UINT8; The message class. See Table 1
message ID:
UINT8; msg-op; See Table 2.
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flags:
UINT16; See Table 3.
tcid:
t-NONE; See Table 4.
len:
UINT16 ; length of all parameters or raw data in bytes. Note:
Operational and Maintenance class messages shall always have a
length that is a factor or 4.
data:
1*(parameter) / *(OCTET) ; raw data may be arbitrary length
sequence of octets.
3.1.1. Message Header Dictionaries
This section defines the dictionaries used in the message header.
See Section 3.1.
Table 1, below, shows the values defined in the msg-class Dictionary.
These values identify the message class: raw, maintenance or
operational.
+=======+=======+==================================+
| Name | Value | Definition |
+=======+=======+==================================+
| MAINT | %d2 | Maintenance Message |
+-------+-------+----------------------------------+
| OP | %d3 | Operational Message |
+-------+-------+----------------------------------+
| RAW | %d4 | Access to raw data stream (e.g., |
| | | RS-232, RS-485, ARINC-429, etc) |
+-------+-------+----------------------------------+
Table 1: msg-class Dictionary
Table 2, below, shows the values defined in the msg-op Dictionary.
These options further refine the operational message class.
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+============+=======+=========================================+
| Name | Value | Definition |
+============+=======+=========================================+
| FLIGHTDATA | %d2 | Flight Data Info |
+------------+-------+-----------------------------------------+
| DEVSTATUS | %d3 | Device Status |
+------------+-------+-----------------------------------------+
| GDL90 | %d4 | GDL-90 Format Messages without framing, |
| | | FCS or escape characters. [GLD90] |
+------------+-------+-----------------------------------------+
Table 2: msg-op Dictionary
Table 3, below, shows the values defined in the msg-flag-cert
Dictionary. These choices represent the message and parameter
certification level tracking with respect to the [DO-178C]
specification. The message value represents the certification value
of the transmitter, where the parameter value represents the source
data node's certification value.
+==============+=======+================+
| Name | Value | Definition |
+==============+=======+================+
| EXPERIMENTAL | %d0 | Experimental |
+--------------+-------+----------------+
| LEVEL-E | %d1 | DO-178 Level E |
+--------------+-------+----------------+
| LEVEL-D | %d2 | DO-178 Level D |
+--------------+-------+----------------+
| LEVEL-C | %d3 | DO-178 Level C |
+--------------+-------+----------------+
| LEVEL-B | %d4 | DO-178 Level B |
+--------------+-------+----------------+
| LEVEL-A | %d5 | DO-178 Level A |
+--------------+-------+----------------+
Table 3: msg-flag-cert Dictionary
Table 4, below, shows the values defined in the tcid Dictionary.
XSEDE transcoder ID values or NONE if no transcoder.
+======+=======+==========================================+
| Name | Value | Definition |
+======+=======+==========================================+
| NONE | %d0 | No transcoder ID is required or asserted |
+------+-------+------------------------------------------+
Table 4: tcid Dictionary
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3.2. Message Parameter Format
The section defines the elements common to all XSEDE parameters.
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unit | SubUnit |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Parameter Data Len | Ident |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Format | Confidence | Expire | Pflags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
...
: Parameter Data :
...
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 2: Message Parameter Format
Unit:
UINT16 If appropriate, which unit this parameter applies (e.g.,
Engine #1).
SubUnit:
UINT16; If appropriate, which subunit this parameter applies
(e.g., Engine #2, Cylinder #3).
Parameter Ident:
UINT32; This attribute is the composite of the length and a
parameter specific identifier.
Nodes MUST compare to their known parameters to this value as a
whole; that it to say, an Ident with a different length is a
different parameter. This same Ident with a different length
situation commonly occurs when sending range parameters but it
also can happen when parameter definitions are updated.
If the combined value does not match a known parameter/length
pair, the parameter data length MUST be determined, then padded to
a multiple of four, and the parameter MUST be ignored.
Len: 11 bits; Parameter Data Length in octets. This value MUST
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reflect the usable length of the parameter data, not including
padding, however, the parameter itself MUST be padded to a
length that is a multiple of four bytes to maintain proper word
alignment.
Ident: 21 bits; XSEDE Parameter Identifier. See Section 3.5.
Format:
param_format (OCTET): Format of Parameter Data. See Section 3.3.
Confidence:
param_confidence (OCTET): Confidence of data element. See
Table 5.
Expire:
OCTET; Time to live. %xFF to not expire. See Section 3.2.2 for
encoding.
Pflags:
msg_flag_cert(OCTET) Reserved Flags, bottom three bits are
certification level of data. See Table 3
Parameter Data:
*(OCTET) quadword padded payload.
3.2.1. Parameter Header Dictionaries
Table 5, below, shows the values defined in the param-confidence
Dictionary. These options represent parameter format confidence
levels.
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+===========+=======+===================================+
| Name | Value | Definition |
+===========+=======+===================================+
| USERSEL | %d192 | User selected value at runtime. |
| | | Note: expire value SHOULD be zero |
| | | and MUST be ignored by receivers. |
+-----------+-------+-----------------------------------+
| SYSSEL | %d224 | System selected value at runtime. |
| | | Note: expire value SHOULD be zero |
| | | and MUST be ignored by receivers. |
+-----------+-------+-----------------------------------+
| HIGH | %d100 | Confirmed known value |
+-----------+-------+-----------------------------------+
| UNANIMOUS | %d50 | Redundant data available and is |
| | | rationalized |
+-----------+-------+-----------------------------------+
| RATIONAL | %d40 | Data being rationalized from |
| | | other data sources with normal |
| | | sources ignored |
+-----------+-------+-----------------------------------+
| VOTED | %d30 | Data is redundantly verified from |
| | | identical instruments |
+-----------+-------+-----------------------------------+
| SMOOTHED | %d20 | Smoothed/filtered version of raw |
| | | data |
+-----------+-------+-----------------------------------+
| RAW / | %d10 | Raw or reported unchecked data |
| REPORTED | | |
+-----------+-------+-----------------------------------+
| ESTIMATE | %d5 | Rough estimation |
+-----------+-------+-----------------------------------+
| USELESS | %d0 | Value is missing or expected |
| | | invalid and supplied for |
| | | debugging ONLY |
+-----------+-------+-----------------------------------+
Table 5: param-confidence Dictionary
The msg_flag_cert Dictionary is also used. See Table 3 for its
definition.
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3.2.2. Expire Encoding
Information provided in messages have a limited usability lifetime or
time-to-live. The Expire field is used to indicate how long the
associated parameter is valid. It is an eight-bit field that is
split into an exponent and mantissa to provide the maximum range and
precision within this small space. The upper four bits represent the
the mantissa and the lower four bits represent the exponent. If the
value of the Expire field is %x00, the value MUST be interpreted to
mean "the parameter does not expire," otherwise the expiry time value
MUST be determined by the following formula:
Expiration (milliseconds) = (16 + M) * 2^E which can be implemented
with ( 0x10 | M ) << E
This approach give us the range of 17 to 1015880 milliseconds (about
17 minutes) with 0x00 reserved as "No Expiration."
0
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
| M | E |
+-+-+-+-+-+-+-+-+
Figure 3: Message Parameter Format
For example, an expiry value of %x13 gives a mantissa of 0001 and an
exponent of 0011 yielding a value of (16 + 1) * 2^E ms or 128
milliseconds.
Another example, a value of %xF7 which decomposes to a mantissa of
1111 and an exponent of 0111 yielding a value of (16 + 15) * 2^7 ms,
or 3968 milliseconds.
The minimum value of %x01 which decomposes to a mantissa of 0001 and
an exponent of 0000 yielding a value of (16 + 1) * 2^0 ms, or 17
milliseconds.
The maximum value of %xFF which decomposes to a mantissa of 1111 and
an exponent of 1111 yielding a value of (16 + 15) * 2^15 ms, or
1015808 milliseconds, which is about 17 minutes.
A final example, %x00 which is a special case for "No Expiration."
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3.3. Parameter Attribute Formats
The various attributes associated with parameters occur as both
simple types, such as Integers and compound structures, such as
Waypoints. This section defines the attribute formats that are used
in XSEDE.
3.3.1. BOOL Parameter Format
Boolean Format
Parameter Identifier: %d1
Length: 4
Structure:
+============+=========+============================+
| Item | Type | Description |
+============+=========+============================+
| bool-value | boolean | Zero for false, 1 for |
| | | true, all others undefined |
+------------+---------+----------------------------+
Table 6: BOOL Parameter Format
Table 7, below, shows the values defined in the boolean Dictionary.
These options represent the nominal boolean values.
+=======+=======+============+
| Name | Value | Definition |
+=======+=======+============+
| FALSE | %d0 | False |
+-------+-------+------------+
| TRUE | %d1 | True |
+-------+-------+------------+
Table 7: boolean Dictionary
3.3.2. UINT Parameter Format
Unsigned 32-bit Integer Format
Parameter Identifier: %d2
Length: 4
Structure:
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+============+========+=======================+
| Item | Type | Description |
+============+========+=======================+
| uint-value | uint32 | 32-bit Unsigned Value |
+------------+--------+-----------------------+
Table 8: UINT Parameter Format
3.3.3. WAYPOINT Parameter Format
Waypoint on a Flight Plan
Parameter Identifier: %d3
Length: 80
Structure:
+===========+===============+===============================+
| Item | Type | Description |
+===========+===============+===============================+
| label | 12*12(OCTET) | Name of waypoint |
+-----------+---------------+-------------------------------+
| lat | int32 | Latitude of waypoint * |
| | | 10,000,000 |
+-----------+---------------+-------------------------------+
| lon | int32 | Longitude of waypoint * |
| | | 10,000,000 |
+-----------+---------------+-------------------------------+
| lonlen | int32 | Length of degree of longitude |
| | | for this latitude in meters |
+-----------+---------------+-------------------------------+
| alt | int32 | Altitude associated with |
| | | waypoint in 0.1ft |
+-----------+---------------+-------------------------------+
| minalt | int32 | Logical Minimum for Fix |
| | | Crossing in 0.1ft |
+-----------+---------------+-------------------------------+
| maxalt | int32 | Logical Maximum Altitude for |
| | | Fix Crossing in 0.1ft |
+-----------+---------------+-------------------------------+
| speed | int32 | Target indicated airspeed |
+-----------+---------------+-------------------------------+
| magadj | uint32 | Original (VOR) or Current |
| | | (GPS) Magnetic Deviation in |
| | | 0.01 degrees of NAVAID |
+-----------+---------------+-------------------------------+
| inbound | uint16 | Inbound course in 0.01 |
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| | | degrees |
+-----------+---------------+-------------------------------+
| outbound | uint16 | Outbound course in 0.01 |
| | | degrees |
+-----------+---------------+-------------------------------+
| freqkhz | uint32 | Frequency in khz if this is a |
| | | NAV AID |
+-----------+---------------+-------------------------------+
| wtype | fms-waypoint | Type of waypoint |
+-----------+---------------+-------------------------------+
| ctype | fms-container | Type of container |
+-----------+---------------+-------------------------------+
| flags | fms-flag | Flags for the waypoint / leg |
+-----------+---------------+-------------------------------+
| cumete | uint32 | Cumulative ETE from active |
| | | waypoint in 0.01 seconds |
+-----------+---------------+-------------------------------+
| cumdis | uint32 | Cumulative distance from |
| | | active waypoint in 0.001 nm |
+-----------+---------------+-------------------------------+
| container | 16*16(OCTET) | What container is this |
| | | waypoint a part of (e.g., |
| | | V431, ILS-18L, etc) |
+-----------+---------------+-------------------------------+
Table 9: WAYPOINT Parameter Format
Table 10, below, shows the values defined in the fms-waypoint
Dictionary. These options represent the flight management system
waypoint types.
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+============+=======+================================+
| Name | Value | Definition |
+============+=======+================================+
| UNKNOWN | %d0 | Unknown or unspecified |
+------------+-------+--------------------------------+
| GS | %x80 | Glideslope component |
+------------+-------+--------------------------------+
| DME | %x40 | DME Component |
+------------+-------+--------------------------------+
| TACAN | %x20 | TACAN Component |
+------------+-------+--------------------------------+
| VOR | %d1 | VOR Component |
+------------+-------+--------------------------------+
| LOC | %d2 | Localizer component |
+------------+-------+--------------------------------+
| NDB | %d3 | NDB component |
+------------+-------+--------------------------------+
| LDA | %d4 | LDA Component |
+------------+-------+--------------------------------+
| SDF | %d5 | SDF Component |
+------------+-------+--------------------------------+
| FIX | %d6 | Generic RNAV Fix |
+------------+-------+--------------------------------+
| ILS | %d7 | Complete ILS system |
+------------+-------+--------------------------------+
| AIRPORT | %d8 | An Airport |
+------------+-------+--------------------------------+
| DIRECTFROM | %d9 | Starting point of a direct to |
+------------+-------+--------------------------------+
| WEATHER | %d10 | Weather reporting station only |
+------------+-------+--------------------------------+
Table 10: fms-waypoint Dictionary
Table 11, below, shows the values defined in the fms-container
Dictionary. These options represent the flight management system
container types.
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+=========+=======+==================================+
| Name | Value | Definition |
+=========+=======+==================================+
| UNKNOWN | %d0 | Unspecified or unknown container |
+---------+-------+----------------------------------+
| NONE | %d1 | No container |
+---------+-------+----------------------------------+
| VICTOR | %d2 | VOR Airway |
+---------+-------+----------------------------------+
| JET | %d3 | Jet Airway |
+---------+-------+----------------------------------+
| AMBER | %d4 | Amber Airway |
+---------+-------+----------------------------------+
| BLUE | %d5 | Blue Airway |
+---------+-------+----------------------------------+
| GREEN | %d6 | Green Airway |
+---------+-------+----------------------------------+
| RED | %d7 | Red Airway |
+---------+-------+----------------------------------+
| Q | %d8 | RNAV Q Routes |
+---------+-------+----------------------------------+
| T | %d9 | RNAV T Routes |
+---------+-------+----------------------------------+
| STAR | %d10 | Standard Arrival Procedure |
+---------+-------+----------------------------------+
| DP | %d11 | Standard Departure Procedure |
+---------+-------+----------------------------------+
| APP | %d12 | Instrument Approach |
+---------+-------+----------------------------------+
Table 11: fms-container Dictionary
Table 12, below, shows the values defined in the fms-flag Dictionary.
These options represent the flight management system waypoint and leg
flags.
+============+=========+==================================+
| Name | Value | Definition |
+============+=========+==================================+
| NONE | %d0 | No flags or leg type known |
+------------+---------+----------------------------------+
| LEGTYPE-VA | %d1 | Heading to Altitude |
+------------+---------+----------------------------------+
| LEGTYPE-VD | %d2 | Heading to DME Distance |
+------------+---------+----------------------------------+
| LEGTYPE-VI | %d3 | Heading to Next Leg Intercept |
+------------+---------+----------------------------------+
| LEGTYPE-VM | %d4 | Heading to Manual Termination |
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+------------+---------+----------------------------------+
| LEGTYPE-VR | %d5 | Heading to Radial Termination |
+------------+---------+----------------------------------+
| LEGTYPE-CA | %d6 | Course to an Altitude |
+------------+---------+----------------------------------+
| LEGTYPE-CD | %d7 | Course to a DME Distance |
+------------+---------+----------------------------------+
| LEGTYPE-CI | %d8 | Course to Next Leg Intercept |
+------------+---------+----------------------------------+
| LEGTYPE-CR | %d9 | Course to Radial Termination |
+------------+---------+----------------------------------+
| LEGTYPE-CF | %d10 | Course to a Fix |
+------------+---------+----------------------------------+
| LEGTYPE-TF | %d11 | Tracking Between Two Fixes |
+------------+---------+----------------------------------+
| LEGTYPE-DF | %d12 | Direct to a Fix |
+------------+---------+----------------------------------+
| LEGTYPE-FA | %d13 | Course from a Fix to an Altitude |
+------------+---------+----------------------------------+
| LEGTYPE-FC | %d14 | Course from a Fix to an Along |
| | | Track Distance |
+------------+---------+----------------------------------+
| LEGTYPE-FD | %d15 | Course from a Fix to a DME |
| | | Distance |
+------------+---------+----------------------------------+
| LEGTYPE-FM | %d16 | Course from a Fix to a Manual |
| | | Termination |
+------------+---------+----------------------------------+
| LEGTYPE-AF | %d17 | Constant DMA Arc to a Fix |
+------------+---------+----------------------------------+
| LEGTYPE-HF | %d18 | Hold to a Fix |
+------------+---------+----------------------------------+
| LEGTYPE-HA | %d19 | Hold to an Altitude |
+------------+---------+----------------------------------+
| LEGTYPE-HM | %d20 | Hold to a Manual Termination |
+------------+---------+----------------------------------+
| LEGTYPE-IF | %d21 | Initial Fix |
+------------+---------+----------------------------------+
| LEGTYPE-PI | %d22 | Procedure Turn to Intercept |
+------------+---------+----------------------------------+
| LEGTYPE-RF | %d23 | Radius to a Fix |
+------------+---------+----------------------------------+
| FLYOVER | %x01.00 | If not present, fly by |
+------------+---------+----------------------------------+
| DISC | %x02.00 | If present, Discontinuity before |
| | | current waypoint |
+------------+---------+----------------------------------+
| ACTIVE | %x04.00 | If present, this is the active |
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| | | waypoint |
+------------+---------+----------------------------------+
| OBS | %x08.00 | If present, waypoint allows OBS |
| | | to be set |
+------------+---------+----------------------------------+
| FAF | %x10.00 | If present, waypoint is final |
| | | approach fix or after |
+------------+---------+----------------------------------+
| SUSPEND | %x20.00 | FMS sequencing is suspended at |
| | | this waypoint |
+------------+---------+----------------------------------+
| LAST | %x40.00 | This waypoint is the last one in |
| | | the flight plan |
+------------+---------+----------------------------------+
Table 12: fms-flag Dictionary
3.3.4. STRING Parameter Format
String of characters (may not have NULL termination)
Parameter Identifier: %d4
Length: length(data) + 0
Structure:
+==============+==========+===========================+
| Item | Type | Description |
+==============+==========+===========================+
| string-value | *(OCTET) | Optionally NUL terminated |
| | | [ISO88591] String |
+--------------+----------+---------------------------+
Table 13: STRING Parameter Format
3.3.5. CASMSG Parameter Format
CAS Message
Parameter Identifier: %d5
Length: length(data) + 4
Structure:
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+=======+=============+=======================+
| Item | Type | Description |
+=======+=============+=======================+
| level | cas-msglvl | CAS level |
+-------+-------------+-----------------------+
| rsvd | uint8 | Reserved, set to 0 |
+-------+-------------+-----------------------+
| flags | cas-msgflag | CAS related flags |
+-------+-------------+-----------------------+
| label | *(OCTET) | Label for CAS Message |
+-------+-------------+-----------------------+
Table 14: CASMSG Parameter Format
Table 15, below, shows the values defined in the cas-msglvl
Dictionary. These options represent the Message levels for CAS
messages and checklist items.
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+===========+=======+========================================+
| Name | Value | Definition |
+===========+=======+========================================+
| CLEAR | %d0 | Clear a previously issued CAS message |
| | | -- issue from system only |
+-----------+-------+----------------------------------------+
| DEBUG | %d1 | In-system debugging output only |
+-----------+-------+----------------------------------------+
| LOG | %d2 | Log to system log, but do not display |
+-----------+-------+----------------------------------------+
| MAINT | %d3 | Display only for maintenance purposes |
+-----------+-------+----------------------------------------+
| STATUS | %d4 | Aircraft system status only |
+-----------+-------+----------------------------------------+
| ADVISORY | %d5 | Advisory, flight crew should be aware, |
| | | may require later crew response |
+-----------+-------+----------------------------------------+
| CAUTION | %d6 | Caution, requires immediate flight |
| | | crew awareness and later response |
+-----------+-------+----------------------------------------+
| WARNING | %d7 | Warning, requires immediate awareness |
| | | and response. |
+-----------+-------+----------------------------------------+
| COMMENT | %d10 | Checklist Comment Associated with |
| | | Previous Item |
+-----------+-------+----------------------------------------+
| UNCHKITEM | %d11 | Unchecked Checklist Item |
+-----------+-------+----------------------------------------+
| CHKITEM | %d12 | Checked Checklist Item |
+-----------+-------+----------------------------------------+
| CHKBRANCH | %d13 | Checklist Branch Choice |
+-----------+-------+----------------------------------------+
Table 15: cas-msglvl Dictionary
Table 16, below, shows the values defined in the cas-msgflag
Dictionary. These options represent the Additional flags associated
with CAS messages.
+======+=======+=========================================+
| Name | Value | Definition |
+======+=======+=========================================+
| AUTO | %x01 | Item is automatically checked/unchecked |
+------+-------+-----------------------------------------+
Table 16: cas-msgflag Dictionary
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3.3.6. SINT Parameter Format
Signed 32-bit Integer Format
Parameter Identifier: %d9
Length: 4
Structure:
+============+=======+======================================+
| Item | Type | Description |
+============+=======+======================================+
| sint-value | int32 | Signed 32-bit two's complement value |
+------------+-------+--------------------------------------+
Table 17: SINT Parameter Format
3.3.7. BUS Parameter Format
Bus and Electronic Circuit Breaker Format
Parameter Identifier: %d10
Length: length(data) + 24
Structure:
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+==========+===========+=====================================+
| Item | Type | Description |
+==========+===========+=====================================+
| state | ecb-state | State of Bus (in terms of ECB) |
+----------+-----------+-------------------------------------+
| ecbflags | ecb-flag | Flags regarding ECB state |
+----------+-----------+-------------------------------------+
| involts | int16 | Input Volts on Bus |
+----------+-----------+-------------------------------------+
| drawamps | int16 | Current draw on bus |
+----------+-----------+-------------------------------------+
| maxamps | int16 | Max Amps on bus |
+----------+-----------+-------------------------------------+
| champs | int16 | Caution high amps |
+----------+-----------+-------------------------------------+
| clamps | int16 | Caution low amps |
+----------+-----------+-------------------------------------+
| minamps | int16 | Minimum amps on bus (could be -) |
+----------+-----------+-------------------------------------+
| outvolts | int16 | Output Volts on Bus |
+----------+-----------+-------------------------------------+
| maxvolts | int16 | Max volts |
+----------+-----------+-------------------------------------+
| chvolts | int16 | Caution high voltage |
+----------+-----------+-------------------------------------+
| clvolts | int16 | Caution low voltage |
+----------+-----------+-------------------------------------+
| minvolts | int16 | Minimum low voltage |
+----------+-----------+-------------------------------------+
| label | *(OCTET) | Label for BUS Message (System/Item) |
+----------+-----------+-------------------------------------+
Table 18: BUS Parameter Format
Table 19, below, shows the values defined in the ecb-state
Dictionary. These options represent the Electronic circuit breaker
status.
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+==========+=======+======================================+
| Name | Value | Definition |
+==========+=======+======================================+
| UNKNOWN | %d0 | Circuit is in an unknown condition |
+----------+-------+--------------------------------------+
| OFF | %d1 | Circuit is turned off |
+----------+-------+--------------------------------------+
| ON | %d2 | Circuit is turned on |
+----------+-------+--------------------------------------+
| UNDERCUR | %d3 | Circuit is on, <100ma current drawn |
+----------+-------+--------------------------------------+
| RESET | %d4 | Request Reset |
+----------+-------+--------------------------------------+
| FORWARD | %d5 | ECB is active logical FWD direction |
+----------+-------+--------------------------------------+
| REVERSE | %d6 | ECB is active logical REV direction |
+----------+-------+--------------------------------------+
| TARGET | %d7 | ECB is set by target, not ON/OFF |
+----------+-------+--------------------------------------+
| BRAKELOW | %d8 | ECB is set by target, not ON/OFF |
+----------+-------+--------------------------------------+
| SHORTED | %d128 | Short Circuit |
+----------+-------+--------------------------------------+
| OVERCUR | %d129 | Overcurrent (but not short circuit) |
+----------+-------+--------------------------------------+
| OVERVOL | %d130 | Overvoltage situation |
+----------+-------+--------------------------------------+
| DISABLED | %d131 | Disabled by state-fault |
+----------+-------+--------------------------------------+
| RUNAWAY | %d132 | Disabled due to runaway (trim/flaps) |
+----------+-------+--------------------------------------+
| COLLARED | %d133 | Should not reset in flight |
+----------+-------+--------------------------------------+
| JAMMED | %d134 | Mechanical Jam detected |
+----------+-------+--------------------------------------+
| PULLED | %d135 | Pulled |
+----------+-------+--------------------------------------+
| BACKFLOW | %d136 | Disabled due to reverse current flow |
+----------+-------+--------------------------------------+
Table 19: ecb-state Dictionary
Table 20, below, shows the values defined in the ecb-flag Dictionary.
These options represent the Electronic circuit breaker parameter
flags.
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+============+=======+============================+
| Name | Value | Definition |
+============+=======+============================+
| INPUTVOLTS | %x01 | Input Volts field is valid |
+------------+-------+----------------------------+
Table 20: ecb-flag Dictionary
3.3.8. RANGE Parameter Format
Range description format
Parameter Identifier: %d11
Length: 24
Structure:
+==========+=============+==============================+
| Item | Type | Description |
+==========+=============+==============================+
| numticks | uint16 | How many valid ticks are in |
| | | the parameter data |
+----------+-------------+------------------------------+
| units | param-units | Specifier for units for |
| | | display |
+----------+-------------+------------------------------+
| divisor | int32 | For display purposes, what |
| | | are logical divisions |
+----------+-------------+------------------------------+
| minval | int32 | Minimum valid value |
+----------+-------------+------------------------------+
| maxval | int32 | Maximum valid value |
+----------+-------------+------------------------------+
| mindisp | int32 | Where display starts (values |
| | | lower than this are clipped) |
+----------+-------------+------------------------------+
| maxdisp | int32 | Where display stops (values |
| | | higher tha this are clipped) |
+----------+-------------+------------------------------+
| ticks | starray | Actual tick data |
| | | representing the scale marks |
+----------+-------------+------------------------------+
Table 21: RANGE Parameter Format
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Table 22, below, shows the values defined in the param-units
Dictionary. These options represent the Units for the encoding and
translation of XSEDE parameters.
+========+=========+===============================================+
| Name | Value | Definition |
+========+=========+===============================================+
| UNSPEC | %x00 | Units not specified |
+--------+---------+-----------------------------------------------+
| INHG | %x00.01 | Use inches of Hg for BARO/MANPRES |
+--------+---------+-----------------------------------------------+
| FT | %x00.02 | Use feet for altitude |
+--------+---------+-----------------------------------------------+
| NM | %x00.03 | Use nautical miles for distance |
+--------+---------+-----------------------------------------------+
| C | %x00.04 | Use celsius for temperature |
+--------+---------+-----------------------------------------------+
| LBFT | %x00.05 | Use pound-feet for torque |
+--------+---------+-----------------------------------------------+
| S | %x00.06 | Use seconds for time |
+--------+---------+-----------------------------------------------+
| A | %x00.07 | Use amps for current |
+--------+---------+-----------------------------------------------+
| V | %x00.08 | Use volts for voltage |
+--------+---------+-----------------------------------------------+
| LB | %x00.09 | Use pounds for weight |
+--------+---------+-----------------------------------------------+
| IN | %x00.0a | Use inches for distance |
+--------+---------+-----------------------------------------------+
| FPM | %x00.0b | Use feet per minute for rate of climb/descent |
+--------+---------+-----------------------------------------------+
| LBPH | %x00.0c | Pounds per Hour for fuel flow |
+--------+---------+-----------------------------------------------+
| DEGPS | %x00.0d | Degrees per second for attitude change |
+--------+---------+-----------------------------------------------+
| DEG | %x00.0e | Degrees for attitude |
+--------+---------+-----------------------------------------------+
| G | %x00.0f | G force for load |
+--------+---------+-----------------------------------------------+
| RGBA | %x00.10 | 8888 RGBA Value |
+--------+---------+-----------------------------------------------+
| KHZ | %x00.11 | Kilohertz for Frequency |
+--------+---------+-----------------------------------------------+
| PCENT | %x00.12 | Percent of Maximum |
+--------+---------+-----------------------------------------------+
| KT | %x00.13 | Knots for Speed |
+--------+---------+-----------------------------------------------+
| NMPLB | %x00.14 | Nautical Miles per Pound |
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+--------+---------+-----------------------------------------------+
| KTPS | %x00.15 | Knots per second |
+--------+---------+-----------------------------------------------+
| MACH | %x00.16 | Speed of sound |
+--------+---------+-----------------------------------------------+
| CPM | %x00.17 | Count per minute |
+--------+---------+-----------------------------------------------+
| PPM | %x00.18 | Parts per million |
+--------+---------+-----------------------------------------------+
| LPM | %x00.19 | Liters Per Minute |
+--------+---------+-----------------------------------------------+
| KW | %x00.1a | Kilowatt |
+--------+---------+-----------------------------------------------+
| AH | %x00.1b | Amp Hour |
+--------+---------+-----------------------------------------------+
| HPA | %x80.01 | Use Hecto pascals for BARO |
+--------+---------+-----------------------------------------------+
| M | %x80.02 | Use meters for altitude |
+--------+---------+-----------------------------------------------+
| SM | %x80.03 | Use statute miles for distance |
+--------+---------+-----------------------------------------------+
| F | %x80.04 | Use fahrenheit for temperature |
+--------+---------+-----------------------------------------------+
| NWM | %x80.05 | Use Newton Meters for torque |
+--------+---------+-----------------------------------------------+
| PSI | %x80.06 | Use PSI for MANPRES |
+--------+---------+-----------------------------------------------+
| MPH | %x80.07 | Use miles per hour for speed |
+--------+---------+-----------------------------------------------+
| SMPLB | %x80.08 | Statues Miles per Pound |
+--------+---------+-----------------------------------------------+
| MIN | %x80.09 | Minutes |
+--------+---------+-----------------------------------------------+
| HR | %x80.0a | Hours |
+--------+---------+-----------------------------------------------+
| HP | %x80.0b | Use Horsepower for power |
+--------+---------+-----------------------------------------------+
| KG | %x80.0c | Use kilograms for weight |
+--------+---------+-----------------------------------------------+
| UL | %xff.ff | Unitless |
+--------+---------+-----------------------------------------------+
Table 22: param-units Dictionary
3.3.9. GPIO Parameter Format
GPIO summary format
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Parameter Identifier: %d12
Length: 12
Structure:
+==========+========+============================================+
| Item | Type | Description |
+==========+========+============================================+
| features | uint32 | 4-bit Feature (XFS_GPIO_FEATURE_*) x 8 |
+----------+--------+--------------------------------------------+
| outmodes | uint32 | 4-bit Output modes (XFS_GPIO_OUTPUT_*) x 8 |
+----------+--------+--------------------------------------------+
| inmodes | uint16 | 2-bit Input modes (XFS_GPIO_INPUT_*) x 8 |
+----------+--------+--------------------------------------------+
| flags | uint16 | Reserved for future use |
+----------+--------+--------------------------------------------+
Table 23: GPIO Parameter Format
3.3.10. APP Parameter Format
APP status format
Parameter Identifier: %d13
Length: length(data) + 56
Structure:
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+============+==============+====================================+
| Item | Type | Description |
+============+==============+====================================+
| state | scb-state | State of application* |
+------------+--------------+------------------------------------+
| rsvd | uint8 | Reserved bits |
+------------+--------------+------------------------------------+
| appflags | uint16 | Flags regarding app |
+------------+--------------+------------------------------------+
| period | uint16 | Baseline runtime period |
| | | (XFS_SCHED_PERIOD_*) |
+------------+--------------+------------------------------------+
| avgcpu | uint16 | Average OS CPU time utilization in |
| | | units per period over last second |
+------------+--------------+------------------------------------+
| hwcpu | uint16 | High water OS CPU time utilization |
| | | in units per period |
+------------+--------------+------------------------------------+
| cpulim | uint16 | Limitation of OS CPU time |
| | | utilization in units per period |
+------------+--------------+------------------------------------+
| runtime | uint16 | Max allocated runtime (per period) |
+------------+--------------+------------------------------------+
| deadline | uint16 | Deadline for completion (per |
| | | period) |
+------------+--------------+------------------------------------+
| avgruntime | uint16 | Average runtime over last 1s |
+------------+--------------+------------------------------------+
| hwruntime | uint16 | High water runtime |
+------------+--------------+------------------------------------+
| ivcsw | uint32 | Involuntary context switches |
+------------+--------------+------------------------------------+
| aircraftid | 16*16(OCTET) | Aircraft Identifier |
+------------+--------------+------------------------------------+
| swrev | 16*16(OCTET) | Software Version Identifier |
+------------+--------------+------------------------------------+
| label | *(OCTET) | Name of APP |
+------------+--------------+------------------------------------+
Table 24: APP Parameter Format
Table 25, below, shows the values defined in the scb-state
Dictionary. These options represent the Software circuit breaker
states.
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+===========+=======+============================================+
| Name | Value | Definition |
+===========+=======+============================================+
| UNKNOWN | %d0 | State of software is unknown |
+-----------+-------+--------------------------------------------+
| STARTING | %d1 | Application is in startup phase |
+-----------+-------+--------------------------------------------+
| RUNNING | %d2 | Application is running |
+-----------+-------+--------------------------------------------+
| STOPPING | %d3 | Stopping has been requested |
+-----------+-------+--------------------------------------------+
| RESTART | %d4 | Restart Application (PULL + RESET + START) |
+-----------+-------+--------------------------------------------+
| RESET | %d5 | Allow application to be started |
+-----------+-------+--------------------------------------------+
| HUNG | %d6 | Application is running but is no longer |
| | | responsive |
+-----------+-------+--------------------------------------------+
| DEGRADED | %d127 | Application is running in a degraded mode |
+-----------+-------+--------------------------------------------+
| STOPPED | %d128 | Application is stopped |
+-----------+-------+--------------------------------------------+
| STARTFAIL | %d129 | Application failed startup |
+-----------+-------+--------------------------------------------+
| RUNAWAY | %d130 | Application has a runaway loop |
+-----------+-------+--------------------------------------------+
| OVERCPU | %d131 | Application is using excessive CPU while |
| | | in RUNNING state |
+-----------+-------+--------------------------------------------+
| OVERMEM | %d132 | Application terminated due to memory |
| | | overrun |
+-----------+-------+--------------------------------------------+
| EXCEPTION | %d133 | Application terminated due to runtime |
| | | exception |
+-----------+-------+--------------------------------------------+
| ENDED | %d134 | Application ended without error or request |
+-----------+-------+--------------------------------------------+
| ENDERROR | %d135 | Application ended with error condition |
+-----------+-------+--------------------------------------------+
| PULLED | %d136 | Application should not be allowed to run |
| | | until reset |
+-----------+-------+--------------------------------------------+
| COLLARED | %d137 | Should not reset in flight |
+-----------+-------+--------------------------------------------+
Table 25: scb-state Dictionary
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3.3.11. WBRANGE Parameter Format
Weight and Balance Range
Parameter Identifier: %d14
Length: 16
Structure:
+=============+=========+============================+
| Item | Type | Description |
+=============+=========+============================+
| flags | uint16 | Flags if any |
+-------------+---------+----------------------------+
| numslices | uint16 | Number of slices specified |
+-------------+---------+----------------------------+
| maxtakeoff | uint32 | Max takeoff weight |
+-------------+---------+----------------------------+
| maxlanding | uint32 | Max landing weight |
+-------------+---------+----------------------------+
| maxzerofuel | uint32 | Max zero fuel weight |
+-------------+---------+----------------------------+
| slices | starray | Slices that form weight |
| | | and balance envelope |
+-------------+---------+----------------------------+
Table 26: WBRANGE Parameter Format
3.3.12. UPDATE Parameter Format
Aircraft Update Progress
Parameter Identifier: %d15
Length: length(data) + 56
Structure:
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+============+======================+=====================+
| Item | Type | Description |
+============+======================+=====================+
| aircraftid | 16*16(OCTET) | Aircraft Identifier |
+------------+----------------------+---------------------+
| progress | uint32 | Progress |
+------------+----------------------+---------------------+
| progflags | msg-cmd-updstat-flag | Progress Flags |
+------------+----------------------+---------------------+
| activity | 32*32(OCTET) | Description of |
| | | current activity |
+------------+----------------------+---------------------+
| label | *(OCTET) | Name of CPU being |
| | | updated |
+------------+----------------------+---------------------+
Table 27: UPDATE Parameter Format
Table 28, below, shows the values defined in the msg-cmd-updstat-flag
Dictionary. These options represent the Maintenance mode status
update flags.
+=========+=======+===================================+
| Name | Value | Definition |
+=========+=======+===================================+
| SUCCESS | %x01 | Update is complete and successful |
+---------+-------+-----------------------------------+
| ERROR | %x02 | Error during update |
+---------+-------+-----------------------------------+
Table 28: msg-cmd-updstat-flag Dictionary
3.3.13. SERVO Parameter Format
Position with flags to interpret whether servo should be engaged,
disengaged or left alone and whether active
Parameter Identifier: %d16
Length: 8
Structure:
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+===========+============+=============+
| Item | Type | Description |
+===========+============+=============+
| servopos | int32 | undefined |
+-----------+------------+-------------+
| servomode | afcs-servo | undefined |
+-----------+------------+-------------+
Table 29: SERVO Parameter Format
Table 30, below, shows the values defined in the afcs-servo
Dictionary. These options represent the Servo engagement flags.
+============+===============+===============================+
| Name | Value | Definition |
+============+===============+===============================+
| ENGAGE | %x80.00.00.00 | If present in engagement |
| | | request, along with 'ENGAGED' |
| | | value, set engagement status |
+------------+---------------+-------------------------------+
| ENGAGED | %d1 | For requests, retain current |
| | | engagement state, for status, |
| | | present if currently engaged |
+------------+---------------+-------------------------------+
| DISENGAGED | %d0 | If engaged, disengage and for |
| | | status, currently disengaged |
+------------+---------------+-------------------------------+
Table 30: afcs-servo Dictionary
3.3.14. DBASE Parameter Format
Database Information
Parameter Identifier: %d17
Length: 92
Structure:
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+==========+==============+===============================+
| Item | Type | Description |
+==========+==============+===============================+
| crc | uint32 | undefined |
+----------+--------------+-------------------------------+
| name | 16*16(OCTET) | Name of database (e.g., com) |
+----------+--------------+-------------------------------+
| supplier | 16*16(OCTET) | Who supplied the database |
+----------+--------------+-------------------------------+
| region | 16*16(OCTET) | What region is the data valid |
+----------+--------------+-------------------------------+
| cycle | 16*16(OCTET) | What cycle |
+----------+--------------+-------------------------------+
| valid | 12*12(OCTET) | date at which validity begins |
| | | YYYY-MM-DD string |
+----------+--------------+-------------------------------+
| expires | 12*12(OCTET) | date after which data has |
| | | data YYYY-MM-DD string |
+----------+--------------+-------------------------------+
Table 31: DBASE Parameter Format
3.4. Parameter Ranges
All parameter attributes values are typed, but some are further
constrained to certain ranges. The ranges may limited in both value
and for display purposes. The display 'ticks' can define various
classifications such as a green, yellow, or red range. Furthermore,
ranges can change over time. For instance, good oil pressure for a
cold engine may be normally higher than that for a warm engine and a
special parameter can be broadcast to indicate a range change.
Table 21 defines the RANGE parameter format.
Parameters that have a default range have that range described in the
next section. The default range will be displayed in tabular format.
Many parameters have default and unchangable ranges, while others
have daynamic ranges. Parameters that have dynamic ranges use a
parameter that only differs in the length portion of the Parameter
Data Len & Ident attribute. and having a RANGE attibute as its
payload. The receiving node MUST distinguish between the value and
the range parameters by examining the length portion of the
parameter's attribute. Should a parameter attribute value be outside
the permitted range. the value MUST be ignored.
In the style of the next section, a generic range parameter is
defined below:
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3.4.1. Sample Range Parameter
Parameter ID: Same as main parameter.
Unit Usage: Same as main parameter.
SubUnit Usage: Same as main parameter.
Length: RANGE Length - 24 decimal plus tick data length.
Format: RANGE (See Table 21.)
3.4.2. Ranges
This section defines the default attribute ranges that are used in
XSEDE.
3.4.2.1. SERVO Range Default
Minimum Value: -100000
Maximum Value: 100000
Minimum Display Value: -100000
Maximum Display Value: 100000
Divisor: 1000
3.4.2.2. ROLL Range Default
Minimum Value: -18000
Maximum Value: 17999
Minimum Display Value: -18000
Maximum Display Value: 17999
Divisor: 100
3.4.2.3. PITCH Range Default
Minimum Value: -9000
Maximum Value: 8999
Minimum Display Value: -9000
Maximum Display Value: 9000
Divisor: 100
3.4.2.4. PERCENT Range Default
Minimum Value: 0
Maximum Value: 100
Minimum Display Value: 0
Maximum Display Value: 100
Divisor: 1
3.4.2.5. THOUPERCENT Range Default
Minimum Value: 0
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Maximum Value: 100000
Minimum Display Value: 0
Maximum Display Value: 100000
Divisor: 100
3.4.2.6. HDG Range Default
Minimum Value: 100
Maximum Value: 36099
Minimum Display Value: 1
Maximum Display Value: 36000
Divisor: 100
3.4.2.7. OBS Range Default
Minimum Value: 1000
Maximum Value: 360000
Minimum Display Value: 0
Maximum Display Value: 360000
Divisor: 1000
3.4.2.8. DEVIATION Range Default
Minimum Value: -1000
Maximum Value: 1000
Minimum Display Value: -1000
Maximum Display Value: 1000
Divisor: 1
3.4.2.9. FLAPS Range Default
Minimum Value: -1000
Maximum Value: 1000
Minimum Display Value: -1000
Maximum Display Value: 1000
Divisor: 1
3.4.2.10. BRIGHTNESS Range Default
Minimum Value: 0
Maximum Value: 2000
Minimum Display Value: 0
Maximum Display Value: 2000
Divisor: 1
3.4.2.11. COMFREQ Range Default
Minimum Value: 118000
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Maximum Value: 135999
Minimum Display Value: 118000
Maximum Display Value: 135999
Divisor: 1
3.4.2.12. NAVFREQ Range Default
Minimum Value: 108000
Maximum Value: 117999
Minimum Display Value: 108000
Maximum Display Value: 117999
Divisor: 1
3.5. Parameter Types
This section declares the initial set of XSEDE parameters. Each
parameter is defined by a name and a short description. This is
followed by the numeric parameter ID. Next, the meanings of the unit
and subunit fields are provided, if applicable. and finally the
parameter data format and a reference to the appropriate table
defining the parameter attribute type.
3.5.1. GOAROUND - Go around requested
Parameter ID: %x00.00.00
Unit Usage: None
SubUnit Usage: None
Format: BOOL (See Table 6.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.2. P-ALT - Pressure Altitude
Parameter ID: %x00.00.01
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: FT multiplied by 10.
3.5.3. T-ALT - True Altitude
Parameter ID: %x00.00.02
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: FT multiplied by 10.
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3.5.4. IAS - Indicated Airspeed
Parameter ID: %x00.00.03
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: KT multiplied by 100.
3.5.5. CAS - Calibrated Airspeed
Parameter ID: %x00.00.04
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: KT multiplied by 100.
3.5.6. CASMSG - Crew Alerting System Message
Parameter ID: %x00.00.05
Unit Usage: CAS System ID
SubUnit Usage: None
Format: CASMSG (See Table 14.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.7. THROTPOS - Throttle position
Parameter ID: %x00.00.06
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.8. INAIR - Are we in the air (vs. on the ground)
Parameter ID: %x00.00.07
Unit Usage: None
SubUnit Usage: None
Format: BOOL (See Table 6.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.9. BARO - Current barometric setting
Parameter ID: %x00.00.08
Unit Usage: None
SubUnit Usage: None
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Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
Units: INHG multiplied by 1000.
3.5.10. CLTPOS - Collective Position
Parameter ID: %x00.00.09
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.11. CLTPOSREQ - A/P Requested Collective Position
Parameter ID: %x00.00.0a
Unit Usage: None
SubUnit Usage: None
Format: SERVO (See Table 29.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.12. MAGHDG - Magnetic Heading
Parameter ID: %x00.00.0b
Unit Usage: Source ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: HDG (See Section 3.4.2.6.)
Units: DEG multiplied by 100.
3.5.13. MAGCRS - Magnetic Course (via RNAV)
Parameter ID: %x00.00.0c
Unit Usage: Source ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: HDG (See Section 3.4.2.6.)
Units: DEG multiplied by 100.
3.5.14. TRUECRS - True Course (via RNAV)
Parameter ID: %x00.00.0d
Unit Usage: Source ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
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Default Range: HDG (See Section 3.4.2.6.)
Units: DEG multiplied by 100.
3.5.15. MAGDTK - Desired Course (via RNAV)
Parameter ID: %x00.00.0e
Unit Usage: Source ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: HDG (See Section 3.4.2.6.)
Units: DEG multiplied by 100.
3.5.16. TRUEDTK - Desired course (via RNAV)
Parameter ID: %x00.00.0f
Unit Usage: Source ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: HDG (See Section 3.4.2.6.)
Units: DEG multiplied by 100.
3.5.17. LAT - Current position latitude
Parameter ID: %x00.00.10
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: DEG multiplied by 10000000.
3.5.18. LON - Current position longitude
Parameter ID: %x00.00.11
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: DEG multiplied by 10000000.
3.5.19. RNAVALT - Altitude measured by RNAV
Parameter ID: %x00.00.12
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
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Units: FT multiplied by 10.
3.5.20. ROLL - Current degrees of roll, -18000 being being upside down
towards left, 18000 being upside down to the right
Parameter ID: %x00.00.13
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: ROLL (See Section 3.4.2.2.)
Units: DEG multiplied by 100.
3.5.21. PITCH - Current degrees of pitch, 9000 being straight up, -9000
being straight down
Parameter ID: %x00.00.14
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: PITCH (See Section 3.4.2.3.)
Units: DEG.
3.5.22. YAW - Yaw/Inclination as measured in G force
Parameter ID: %x00.00.15
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: G multiplied by 10000.
3.5.23. FUELTOT - Computed remaining fuel (divisor may be overridden by
fuel type in FUELLEVLR)
Parameter ID: %x00.00.16
Unit Usage: Fuel System ID/0=Sum of all
SubUnit Usage: 0 = current total, 1 = total at end of flight
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: LB multiplied by 100.
3.5.24. RNAVHFOM - Horizontal Figure of Merit
Parameter ID: %x00.00.17
Unit Usage: Source ID
SubUnit Usage: None
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Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Units: M multiplied by 100.
3.5.25. RNAVVFOM - Vertical Figure of Merit
Parameter ID: %x00.00.18
Unit Usage: Source ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Units: M multiplied by 100.
3.5.26. RNAVHPL - Horizontal Protection Level
Parameter ID: %x00.00.19
Unit Usage: Source ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Units: M multiplied by 100.
3.5.27. RNAVVPL - Vertical Protection Level
Parameter ID: %x00.00.1a
Unit Usage: Source ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Units: M multiplied by 100.
3.5.28. IASRT - Indicated Airspeed Rate of Change
Parameter ID: %x00.00.1b
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: KTPS multiplied by 100.
3.5.29. KBDSEL - Activate the named on-screen keyboard or none if empty
Parameter ID: %x00.00.1c
Unit Usage: Display
SubUnit Usage: None
Format: STRING (See Table 13.)
Range: parameter MUST NOT be sent with a range attribute.
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3.5.30. KEYPRESS - Send the FMS encoded key press to the given display
Parameter ID: %x00.00.1d
Unit Usage: Display
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using osk_key dictionary (See Table 32.)
Table 32, below, shows the values defined in the osk-key Dictionary.
These options represent the On screen keyboard keys.
+======+=======+========================+
| Name | Value | Definition |
+======+=======+========================+
| 0 | %d48 | Character 0 |
+------+-------+------------------------+
| 1 | %d49 | Character 1 |
+------+-------+------------------------+
| 2 | %d50 | Character 2 |
+------+-------+------------------------+
| 3 | %d51 | Character 3 |
+------+-------+------------------------+
| 4 | %d52 | Character 4 |
+------+-------+------------------------+
| 5 | %d53 | Character 5 |
+------+-------+------------------------+
| 6 | %d54 | Character 6 |
+------+-------+------------------------+
| 7 | %d55 | Character 7 |
+------+-------+------------------------+
| 8 | %d56 | Character 8 |
+------+-------+------------------------+
| 9 | %d57 | Character 9 |
+------+-------+------------------------+
| A | %d65 | Character A |
+------+-------+------------------------+
| B | %d66 | Character B |
+------+-------+------------------------+
| C | %d67 | Character C |
+------+-------+------------------------+
| D | %d68 | Character D |
+------+-------+------------------------+
| E | %d69 | Character E |
+------+-------+------------------------+
| F | %d70 | Character F |
+------+-------+------------------------+
| G | %d71 | Character G |
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+------+-------+------------------------+
| H | %d72 | Character H |
+------+-------+------------------------+
| I | %d73 | Character I |
+------+-------+------------------------+
| J | %d74 | Character J |
+------+-------+------------------------+
| K | %d75 | Character K |
+------+-------+------------------------+
| L | %d76 | Character L |
+------+-------+------------------------+
| M | %d77 | Character M |
+------+-------+------------------------+
| N | %d78 | Character N |
+------+-------+------------------------+
| O | %d79 | Character O |
+------+-------+------------------------+
| P | %d80 | Character P |
+------+-------+------------------------+
| Q | %d81 | Character Q |
+------+-------+------------------------+
| R | %d82 | Character R |
+------+-------+------------------------+
| S | %d83 | Character S |
+------+-------+------------------------+
| T | %d84 | Character T |
+------+-------+------------------------+
| U | %d85 | Character U |
+------+-------+------------------------+
| V | %d86 | Character V |
+------+-------+------------------------+
| W | %d87 | Character W |
+------+-------+------------------------+
| X | %d88 | Character X |
+------+-------+------------------------+
| Y | %d89 | Character Y |
+------+-------+------------------------+
| Z | %d90 | Character Z |
+------+-------+------------------------+
| PREV | %d60 | Previous position or < |
+------+-------+------------------------+
| NEXT | %d62 | Next position or > |
+------+-------+------------------------+
Table 32: osk-key Dictionary
3.5.31. SURFPOS - Position of arbitrary control surface
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Parameter ID: %x00.00.1e
Unit Usage: Surface Type
SubUnit Usage: Surface Type Subassembly
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.32. SURFREQ - Requested control surface position
Parameter ID: %x00.00.1f
Unit Usage: Surface Type
SubUnit Usage: Surface Type Subassembly
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.33. SURFTORQUE - Aerodynamic torque applied to a control surface
relative to movement
Parameter ID: %x00.00.20
Unit Usage: Surface Type
SubUnit Usage: Surface Type Subassembly
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: LBFT multiplied by 100.
3.5.34. SURFFORCE - Aerodynamic force applied to a control surface
relative to movement
Parameter ID: %x00.00.21
Unit Usage: Surface Type
SubUnit Usage: Surface Type Subassembly
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: LB multiplied by 100.
3.5.35. WINDSPD - Wind Speed
Parameter ID: %x00.00.22
Unit Usage: Source ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Units: KT multiplied by 100.
3.5.36. WINDBRG - True Bearing from which wind blows
Parameter ID: %x00.00.23
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Unit Usage: Source ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: HDG (See Section 3.4.2.6.)
Units: DEG multiplied by 100.
3.5.37. COMFREQKHZ - Communication Frequency
Parameter ID: %x00.00.24
Unit Usage: Radio ID
SubUnit Usage: 0=Radio /1+=Presets
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
Default Range: COMFREQ (See Section 3.4.2.11.)
Units: KHZ.
3.5.38. NAVFREQKHZ - Navigation Frequency
Parameter ID: %x00.00.25
Unit Usage: Radio ID
SubUnit Usage: 0=Radio /1+=Presets
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
Default Range: NAVFREQ (See Section 3.4.2.12.)
Units: KHZ.
3.5.39. COMVOL - Communication Volume (0-100)
Parameter ID: %x00.00.26
Unit Usage: Radio ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: PERCENT (See Section 3.4.2.4.)
Units: PCENT.
3.5.40. NAVVOL - Communication Volume (0-100)
Parameter ID: %x00.00.27
Unit Usage: Radio ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: PERCENT (See Section 3.4.2.4.)
Units: PCENT.
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3.5.41. COMSQL - Communication Squelch (0-100)
Parameter ID: %x00.00.28
Unit Usage: Radio ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: PERCENT (See Section 3.4.2.4.)
Units: PCENT.
3.5.42. MUX - Selected multiplexer input or output
Parameter ID: %x00.29
Unit Usage: MUX ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.43. ICSVOL - Intercom Volume (0-100)
Parameter ID: %x00.00.2a
Unit Usage: Audio Panel Unit
SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: PERCENT (See Section 3.4.2.4.)
Units: PCENT.
3.5.44. COMSTATE - COM radio state
Parameter ID: %x00.00.2b
Unit Usage: Radio ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using com_state dictionary (See Table 33.)
Table 33, below, shows the values defined in the com-state
Dictionary. These options represent the State of communication
radio.
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+=======+=======+=========================+
| Name | Value | Definition |
+=======+=======+=========================+
| IDLE | R | Ready to Receive (Idle) |
+-------+-------+-------------------------+
| RX | r | Active receiving |
+-------+-------+-------------------------+
| TX | T | Active transmitting |
+-------+-------+-------------------------+
| STUCK | S | Stuck Mic |
+-------+-------+-------------------------+
| FAULT | F | Fault |
+-------+-------+-------------------------+
Table 33: com-state Dictionary
3.5.45. ICSRXCOMS - Which COM Radios to Monitor (mask)
Parameter ID: %x00.00.2c
Unit Usage: Audio Panel Unit
SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.46. ICSRXNAVS - Which NAV Radios to Monitor (mask)
Parameter ID: %x00.00.2d
Unit Usage: Audio Panel Unit
SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.47. ICSMODE - Intercom Mode
Parameter ID: %x00.00.2e
Unit Usage: None
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using ics_mode dictionary (See Table 34.)
Table 34, below, shows the values defined in the ics-mode Dictionary.
These options represent the State of intercom system.
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+=============+=========+============================+
| Name | Value | Definition |
+=============+=========+============================+
| PILOT | P | Pilot Isolate |
+-------------+---------+----------------------------+
| CREW | C | Crew Isolate |
+-------------+---------+----------------------------+
| ALL | A | All |
+-------------+---------+----------------------------+
| FEATUREMASK | %xff.00 | Mask for intercom features |
+-------------+---------+----------------------------+
| POSITIONAL | %x01.00 | Positional dynamic audio |
+-------------+---------+----------------------------+
Table 34: ics-mode Dictionary
3.5.48. ICSTXCOMS - Which COM Radios to Transmit (mask)
Parameter ID: %x00.00.2f
Unit Usage: Audio Panel Unit
SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.49. DATE - Date in YYYY-MM-DD format
Parameter ID: %x00.00.30
Unit Usage: None
SubUnit Usage: None
Format: STRING (See Table 13.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.50. GLOAD - Current Normal to Aircraft Loading
Parameter ID: %x00.00.31
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: G multiplied by 1000.
3.5.51. RATEOFTURN - Turn Coordinator Rate Per Second
Parameter ID: %x00.00.32
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
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Units: DEG multiplied by 1000.
3.5.52. GROUNDSPEED - Groundspeed
Parameter ID: %x00.00.33
Unit Usage: Source ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Units: KT multiplied by 100.
3.5.53. VSPEED - Vertical speed
Parameter ID: %x00.00.34
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: FPM multiplied by 1.
3.5.54. XPDRIDENT - XPDR Ident request (USERSELECT only). Non-standby
transponders must IDENT regardless of UNIT. Used only to
request IDENT, but IDENT state reported in XPDRMODE
Parameter ID: %x00.00.35
Unit Usage: Always zero
SubUnit Usage: None
Format: BOOL (See Table 6.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.55. XPDRRPS - XPDR Replies per second (normalized)
Parameter ID: %x00.00.36
Unit Usage: XPDR ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.56. XPDRSQUAWK - XPDR Squawk as decimal integer (e.g., 1200). All
transponders must change SQUAWK regardless of UNIT
Parameter ID: %x00.00.37
Unit Usage: XPDR ID (Rx Only) Zero for USERSELECT
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
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3.5.57. XPDRMODE - XPDR Mode. Note that IDENT flag is ignored in
USERSELECT condition.
Parameter ID: %x00.00.38
Unit Usage: XPDR ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using xpdr_mode dictionary (See Table 35.)
Table 35, below, shows the values defined in the xpdr-mode
Dictionary. These options represent the Transponder mode and flags.
+============+=======+========================+
| Name | Value | Definition |
+============+=======+========================+
| UNKNOWN | %d0 | Unknown |
+------------+-------+------------------------+
| MODEMASK | %x7f | Mask for mode |
+------------+-------+------------------------+
| STANDBY | O | Standby |
+------------+-------+------------------------+
| GND | G | On Ground |
+------------+-------+------------------------+
| AIR | A | Air/Altitude Reporting |
+------------+-------+------------------------+
| FLAG-IDENT | %x80 | IDENT Active |
+------------+-------+------------------------+
Table 35: xpdr-mode Dictionary
3.5.58. NAVOBS - NAV OBS Value
Parameter ID: %x00.00.39
Unit Usage: Radio/FMS ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: OBS (See Section 3.4.2.7.)
Units: DEG multiplied by 1000.
3.5.59. NAVBRG - Bearing to nav aid
Parameter ID: %x00.00.3a
Unit Usage: Radio/FMS ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
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Default Range: HDG (See Section 3.4.2.6.)
Units: DEG multiplied by 100.
3.5.60. NAVCDI - Course Deviation (-1000 to 1000)
Parameter ID: %x00.00.3b
Unit Usage: Radio/FMS ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: DEVIATION (See Section 3.4.2.8.)
3.5.61. NAVGSI - Glide Slope (-1000 to 1000)
Parameter ID: %x00.00.3c
Unit Usage: Radio/FMS ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: DEVIATION (See Section 3.4.2.8.)
3.5.62. NAVFLAGS - Navigation Flags (see XFS_NAV_FLAG_*
Parameter ID: %x00.00.3d
Unit Usage: Radio/FMS ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using nav_flag dictionary (See Table 36.)
Table 36, below, shows the values defined in the nav-flag Dictionary.
These options represent the Navigational flag states.
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+============+=========+================================+
| Name | Value | Definition |
+============+=========+================================+
| BACKCOURSE | %x01 | NAV receiver is flying a |
| | | localizer back course |
+------------+---------+--------------------------------+
| LOCDETECT | %x02 | The NAV receiver is detecting |
| | | a localizer |
+------------+---------+--------------------------------+
| FROM | %x04 | The FROM flag is detected from |
| | | a VOR |
+------------+---------+--------------------------------+
| TO | %x08 | The TO flag is detected from a |
| | | VOR |
+------------+---------+--------------------------------+
| GSI-SFLAG | %x10 | The glideslope superflag is |
| | | present |
+------------+---------+--------------------------------+
| GSI-VALID | %x20 | The glideslope signal is being |
| | | received and is valid |
+------------+---------+--------------------------------+
| NAV-SFLAG | %x40 | The NAV super flag is present |
+------------+---------+--------------------------------+
| NAV-VALID | %x80 | The localizer or VOR signal is |
| | | being received and is valid |
+------------+---------+--------------------------------+
| FAULT | %x01.00 | Fault detected |
+------------+---------+--------------------------------+
Table 36: nav-flag Dictionary
3.5.63. FLAPREQ - Requested Flap Position 0 = up, 100000 = fully down,
-100000 is fully negative
Parameter ID: %x00.00.3e
Unit Usage: Actuator/0=Aircraft
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.64. FLAPPOS - Flap actuator position, 0 = up, 100000 = fully down,
-100000 is fully negative
Parameter ID: %x00.00.3f
Unit Usage: Actuator/0=Aircraft
SubUnit Usage: None
Format: SINT (See Table 17.)
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Range: parameter MAY be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.65. ECBSTAT - ECB Status change or request, see xfs_ecb.h
Parameter ID: %x00.00.40
Unit Usage: None
SubUnit Usage: None
Format: BUS (See Table 18.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.66. PTRIMREQ - Requested Pitch Trim Position (negative nose down, 0
neutral, positive nose up)
Parameter ID: %x00.00.41
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.67. PTRIMPOS - Pitch Trim Position (negative nose down, 0 neutral,
positive nose up)
Parameter ID: %x00.00.42
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.68. RTRIMREQ - Requested Roll Trim Position (negative left bank, 0
neutral, positive right bank)
Parameter ID: %x00.00.43
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.69. RTRIMPOS - Roll Trim Position (negative left bank, 0 neutral,
positive right bank)
Parameter ID: %x00.00.44
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
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Range: parameter MAY be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.70. BUSSTAT - Status of Bus
Parameter ID: %x00.00.45
Unit Usage: None
SubUnit Usage: None
Format: BUS (See Table 18.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.71. TEMP - Arbitrary Temperature in a location
Parameter ID: %x00.00.46
Unit Usage: Location
SubUnit Usage: Sensor Number/0=Average
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: C multiplied by 100.
3.5.72. TAS - True Airspeed
Parameter ID: %x00.00.47
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: KT multiplied by 100.
3.5.73. TAT - Total Air Temperature
Parameter ID: %x00.00.48
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: C multiplied by 100.
3.5.74. OAT - Outside Air Temperature accounting for compressibility
Parameter ID: %x00.00.49
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: C multiplied by 100.
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3.5.75. D-ALT - Density Altitude
Parameter ID: %x00.00.4a
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: FT multiplied by 10.
3.5.76. OILPRES - Oil Pressure
Parameter ID: %x00.00.4b
Unit Usage: Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: PSI multiplied by 100.
3.5.77. OILTEMP - Oil Temp
Parameter ID: %x00.00.4c
Unit Usage: Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: C multiplied by 100.
3.5.78. XFDFPS - XFD Display Frames Per Second (FPS)
Parameter ID: %x00.00.4d
Unit Usage: Display
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.79. TIREPRES - Tire Pressure
Parameter ID: %x00.00.4e
Unit Usage: Bogey
SubUnit Usage: Tire
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: PSI multiplied by 100.
3.5.80. CHT - Cylinder Head Temperature
Parameter ID: %x00.00.4f
Unit Usage: Engine
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SubUnit Usage: Cylinder/0=Max
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: C multiplied by 100.
3.5.81. EGT - Exhaust Gas Temperature
Parameter ID: %x00.00.50
Unit Usage: Engine
SubUnit Usage: Cylinder/0=Max
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: C multiplied by 100.
3.5.82. COOLTEMP - Coolant Temperature
Parameter ID: %x00.00.51
Unit Usage: Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: C multiplied by 100.
3.5.83. FUELFLOW - Fuel Flow
Parameter ID: %x00.00.52
Unit Usage: Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: LBPH multiplied by 100.
3.5.84. FUELPRES - Fuel Pressure
Parameter ID: %x00.00.53
Unit Usage: Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: PSI multiplied by 100.
3.5.85. FUELLEVL - Fuel Level (divisor may be overridden by fuel type)
Parameter ID: %x00.00.54
Unit Usage: Fuel Tank ID/0=Sum of all
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
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Units: LB multiplied by 100.
3.5.86. MANPRES - Manifold pressure
Parameter ID: %x00.00.55
Unit Usage: Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: INHG multiplied by 1000.
3.5.87. ENGRPM - Engine RPM
Parameter ID: %x00.00.56
Unit Usage: Engine
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
3.5.88. PROPRPM - Propeller RPM
Parameter ID: %x00.00.57
Unit Usage: Engine
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
3.5.89. MACH - Mach
Parameter ID: %x00.00.58
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: MACH multiplied by 10000.
3.5.90. IASBUG - Target indicated airspeed
Parameter ID: %x00.00.59
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: KT multiplied by 100.
3.5.91. HDGBUG - Bugged Magnetic Heading
Parameter ID: %x00.00.5a
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Unit Usage: None
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: HDG (See Section 3.4.2.6.)
Units: DEG multiplied by 100.
3.5.92. ALTBUG - Bugged Altitude
Parameter ID: %x00.00.5b
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: FT multiplied by 10.
3.5.93. WAYPOINT - A waypoint in a flight plan, subunit is the position
in flightplan, beginning with 1 for the first waypoint.
Subunit 0 is only used to indicate an empty flight plan.
Parameter ID: %x00.00.5c
Unit Usage: FMS ID
SubUnit Usage: None
Format: WAYPOINT (See Table 9.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.94. INSERT - Insert a waypoint in a flight plan, subunit is the
position in flightplan which it should become (SYSSEL/USERSEL
ONLY)
Parameter ID: %x00.00.5d
Unit Usage: FMS ID
SubUnit Usage: None
Format: WAYPOINT (See Table 9.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.95. DELETE - Delete a waypoint in a flight plan, subunit is the
position in flightplan starting at 1 (SYSSEL/USERSEL ONLY).
Label must match
Parameter ID: %x00.00.5e
Unit Usage: FMS ID
SubUnit Usage: None
Format: WAYPOINT (See Table 9.)
Range: parameter MUST NOT be sent with a range attribute.
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3.5.96. NOTE - Notation of something important within the quick access
log or bus
Parameter ID: %x00.00.5f
Unit Usage: None
SubUnit Usage: None
Format: STRING (See Table 13.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.97. NAVGPS - GPS Mode
Parameter ID: %x00.00.60
Unit Usage: NAV radio unit or FMS Unit Number
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using nav_gps dictionary (See Table 37.)
Table 37, below, shows the values defined in the nav-gps Dictionary.
These options represent the Global positioning system status.
+==========+=======+===============================================+
| Name | Value | Definition |
+==========+=======+===============================================+
| UNKNOWN | %d0 | GPS Navigation is in unknown state |
+----------+-------+-----------------------------------------------+
| ENROUTE | %d1 | GPS Navigation is in Enroute state |
+----------+-------+-----------------------------------------------+
| TERMINAL | %d2 | GPS Navigation is Terminal state |
+----------+-------+-----------------------------------------------+
| LNAV | %d3 | GPS Navigation is in Lateral Navigation State |
+----------+-------+-----------------------------------------------+
| LNAVVNAV | %d4 | GPS Navigation is Lateral and Vertical NAV |
| | | state |
+----------+-------+-----------------------------------------------+
| LP | %d5 | GPS Navigation is in Localizer Performance |
| | | state |
+----------+-------+-----------------------------------------------+
| LPV | %d6 | GPS Navigation is in Localizer Performance/ |
| | | Vertical state |
+----------+-------+-----------------------------------------------+
Table 37: nav-gps Dictionary
3.5.98. NAVDIS - Distance to next or last waypoint or DME for VOR/ILS/
etc
Parameter ID: %x00.00.61
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Unit Usage: FMS Unit Number
SubUnit Usage: 0 = next waypoint, 1 = last waypoint
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Units: NM multiplied by 1000.
3.5.99. NAVXTK - Cross track error (negative is left)
Parameter ID: %x00.00.62
Unit Usage: FMS Unit Number
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: NM multiplied by 1000.
3.5.100. NAVETE - Time to next or last waypoint
Parameter ID: %x00.00.63
Unit Usage: FMS Unit Number
SubUnit Usage: 0 = next waypoint, 1 = last waypoint
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Units: S multiplied by 100.
3.5.101. BRIGHTNESS - Universal display brightness (0-1000 for night
time mode, 1000-2000 for daytime modes
Parameter ID: %x00.00.64
Unit Usage: None
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: BRIGHTNESS (See Section 3.4.2.10.)
3.5.102. MANTEMP - Manifold temperature
Parameter ID: %x00.00.65
Unit Usage: Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: C multiplied by 100.
3.5.103. DIRECT - Go direct to a waypoint in a flight plan, subunit is
the position in flightplan starting at 1 (SYSSEL/USERSEL
ONLY). Label must match
Parameter ID: %x00.00.66
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Unit Usage: None
SubUnit Usage: None
Format: WAYPOINT (See Table 9.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.104. ACTIVATE - Activate leg terminating at waypoint in a flight
plan, subunit is the position in flightplan (SYSSEL/USERSEL
ONLY). Label must match
Parameter ID: %x00.00.67
Unit Usage: None
SubUnit Usage: None
Format: WAYPOINT (See Table 9.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.105. MMPARAM - Moving Map parameters. Subunit is one of
XFS_MM_PARAM_*
Parameter ID: %x00.00.68
Unit Usage: MOVMAP ID
SubUnit Usage: XFS_MM_PARAM_*
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.106. SERVOREQ - Requested servo position and state
Parameter ID: %x00.00.69
Unit Usage: None
SubUnit Usage: None
Format: SERVO (See Table 29.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.107. SERVOPOS - Current servo actuator position
Parameter ID: %x00.00.6a
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.108. SONICHAT - Ultrasonic rangefinder height above terrain
Parameter ID: %x00.00.6b
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
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Units: FT multiplied by 100.
3.5.109. LIDARHAT - LIDAR rangefinder height above terrain
Parameter ID: %x00.00.6c
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: FT multiplied by 100.
3.5.110. RADARHAT - Radar rangefinder height above terrain
Parameter ID: %x00.00.6d
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: FT multiplied by 100.
3.5.111. HAT - Computed height above terrain
Parameter ID: %x00.00.6e
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: FT multiplied by 100.
3.5.112. COMSTANDBY - Standby COM Frequency (same rules and range as
COMFREQKHZ)
Parameter ID: %x00.00.6f
Unit Usage: Radio ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: COMFREQ (See Section 3.4.2.11.)
3.5.113. NAVSTANDBY - Standby NAV Frequency (same rules and range as
NAVFREQKHZ)
Parameter ID: %x00.00.70
Unit Usage: Radio ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: NAVFREQ (See Section 3.4.2.12.)
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3.5.114. STALLSPEED - Estimated real-time Stall speed
Parameter ID: %x00.00.71
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: KT multiplied by 100.
3.5.115. TIMEMS - Time in milliseconds from midnight zulu time
Parameter ID: %x00.00.72
Unit Usage: None
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.116. YTRIMREQ - Requested Yaw Trim Position (negative left, 0
neutral, positive right)
Parameter ID: %x00.00.73
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.117. YTRIMPOS - Yaw Trim Position (negative left, 0 neutral,
positive right)
Parameter ID: %x00.00.74
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.118. VSPEEDBUG - Vertical speed bug in fpm
Parameter ID: %x00.00.75
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.119. MUSICSRC - Music Source (0 = none)
Parameter ID: %x00.00.76
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Unit Usage: Audio Panel Unit
SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.120. AOA - Angle of attack as an actual angle
Parameter ID: %x00.00.77
Unit Usage: Source
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: DEG multiplied by 1000.
3.5.121. AOAR - Angle of attack range -- should contain green
(beginning of approach range), white (reference angle), yellow
(approaching stall) and a red (imminent stall)
Parameter ID: %x00.00.77
Unit Usage: None
SubUnit Usage: None
Format: RANGE (See Table 21.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.122. GPIO - GPIO Input/Output
Parameter ID: %x00.00.78
Unit Usage: I/O Module
SubUnit Usage: Module Port (0 or 1-8)
Format: GPIO (See Table 23.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.123. ANALOG - Raw Analog value 0-4095
Parameter ID: %x00.00.79
Unit Usage: I/O Module
SubUnit Usage: Module Port (1-8)
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.124. PWM - PWM value 0-4095 -- subunit is port number, 1-8
Parameter ID: %x00.00.7a
Unit Usage: I/O Module
SubUnit Usage: Module Port (1-8)
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
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3.5.125. XPDRACID - ICAO 24-bit Aircraft Identifier
Parameter ID: %x00.00.7b
Unit Usage: XPDR ID (Rx Only) Zero for USERSELECT
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.126. XPDRFLID - Up to 8-character, NULL terminated flight ID
Parameter ID: %x00.00.7c
Unit Usage: XPDR ID (Rx Only) Zero for USERSELECT
SubUnit Usage: None
Format: STRING (See Table 13.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.127. THROTREQ - Requested throttle position
Parameter ID: %x00.00.7d
Unit Usage: None
SubUnit Usage: None
Format: SERVO (See Table 29.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.128. RPMREQ - Prop governor requested RPM
Parameter ID: %x00.00.7e
Unit Usage: None
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.129. TACHTIME - Tachometer time, unit is engine
Parameter ID: %x00.00.7f
Unit Usage: None
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Units: S.
3.5.130. TOTTIME - Total aircraft time
Parameter ID: %x00.00.80
Unit Usage: None
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
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Units: S.
3.5.131. APPSTAT - Application Status / Requests
Parameter ID: %x00.00.00.81
Unit Usage: CPU ID
SubUnit Usage: Process ID
Format: APP (See Table 24.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.132. CDINAVSRC - Select index (> 0) of CDI NAV Source or 0 for none
Parameter ID: %x00.00.82
Unit Usage: Display
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.133. BRGNAVSRC - Select index (> 0) CDI BRG Source or 0 for none
Parameter ID: %x00.00.83
Unit Usage: Display
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.134. COMSEL - Select COM Radio for Tuning
Parameter ID: %x00.00.84
Unit Usage: Display
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.135. NAVSEL - Select NAV Radio for Tuning
Parameter ID: %x00.00.85
Unit Usage: Display
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.136. MSTRCAUTN - Master Caution Active when true. Resets by
SYSSEL/USERSEL with value of FALSE
Parameter ID: %x00.00.86
Unit Usage: None
SubUnit Usage: None
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Format: BOOL (See Table 6.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.137. MSTRWARN - Master Warning Active when true. Resets by SYSSEL/
USERSEL with value of FALSE
Parameter ID: %x00.00.87
Unit Usage: None
SubUnit Usage: None
Format: BOOL (See Table 6.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.138. ROLLRT - Rate of change of about A/C longitudinal axis (P)
Parameter ID: %x00.00.88
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: DEGPS multiplied by 1000.
3.5.139. PITCHRT - Rate of change about A/C transverse axis (Q)
Parameter ID: %x00.00.89
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: DEGPS multiplied by 1000.
3.5.140. YAWRT - Rate of change about A/C vertical axis (R)
Parameter ID: %x00.00.8a
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: DEGPS multiplied by 1000.
3.5.141. STKPITCH - Stick Pitch Position (negative nose down, 0
neutral, positive nose up)
Parameter ID: %x00.00.8b
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
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3.5.142. STKROLL - Stick Roll Position (negative left bank, 0 neutral,
positive right bank)
Parameter ID: %x00.00.8c
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.143. STKYAW - Pedal Yaw Position (negative left, 0 neutral,
positive right)
Parameter ID: %x00.00.8d
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
3.5.144. BATTTEMP - Battery Temp
Parameter ID: %x00.00.8e
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: C multiplied by 100.
3.5.145. MOTORTEMP - Motor Temp
Parameter ID: %x00.00.8f
Unit Usage: Motor
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: C multiplied by 100.
3.5.146. POWERTEMP - Temp of a device supplying/converting power to a
propulsion system
Parameter ID: %x00.00.90
Unit Usage: Propulsion System
SubUnit Usage: Power converter/0=Max
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: C multiplied by 100.
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3.5.147. TORQUE - Torque
Parameter ID: %x00.00.91
Unit Usage: Motor/Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: LBFT multiplied by 100.
3.5.148. TAILNUM - Up to 8-character, NULL terminated tail number
Parameter ID: %x00.00.92
Unit Usage: None
SubUnit Usage: None
Format: STRING (See Table 13.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.149. ROLLREQ - F/D requested degrees of roll in 100 * degrees with
0 being right side up, -18000 being being upside down towards
left, 18000 being upside down to the right
Parameter ID: %x00.00.93
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: ROLL (See Section 3.4.2.2.)
3.5.150. PITCHREQ - F/D requested degrees of pitch in 100 * degrees
with 0 being straight ahead, 9000 being straight up, -9000
being straight down
Parameter ID: %x00.00.94
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: PITCH (See Section 3.4.2.3.)
3.5.151. YAWREQ - F/D requested G force of inclination with 0 being no
yaw
Parameter ID: %x00.00.95
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: G multiplied by 10000.
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3.5.152. STKPITCHREQ - A/P Requested Stick Pitch Position (negative
nose down, 0 neutral, positive nose up)
Parameter ID: %x00.00.96
Unit Usage: None
SubUnit Usage: None
Format: SERVO (See Table 29.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.153. STKROLLREQ - A/P Requested Stick Roll Position (negative left
bank, 0 neutral, positive right bank)
Parameter ID: %x00.00.97
Unit Usage: None
SubUnit Usage: None
Format: SERVO (See Table 29.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.154. STKYAWREQ - A/P Requested Pedal Yaw Position (negative left, 0
neutral, positive right)
Parameter ID: %x00.00.98
Unit Usage: None
SubUnit Usage: None
Format: SERVO (See Table 29.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.155. FDMODEACT - Active Flight Director Modes
Parameter ID: %x00.00.99
Unit Usage: FD Number (0 for setting values)
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using afcs_fd_mode dictionary (See Table 38.)
Table 38, below, shows the values defined in the afcs-fd-mode
Dictionary. These options represent the Vertical, lateral and yaw
modes of flight director.
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+===========+===============+==============================+
| Name | Value | Definition |
+===========+===============+==============================+
| VERT-MASK | %xff | Vertical modes mask |
+-----------+---------------+------------------------------+
| LAT-MASK | %xff.00 | Lateral modes mask |
+-----------+---------------+------------------------------+
| YAW-MASK | %xff.00.00.00 | Yaw modes mask |
+-----------+---------------+------------------------------+
| PITCH | %x01 | Activate pitch mode |
+-----------+---------------+------------------------------+
| VS | %x02 | Activate vertical speed mode |
+-----------+---------------+------------------------------+
| FLC | %x04 | Activate indicated airspeed |
| | | mode / flight level change |
+-----------+---------------+------------------------------+
| PRF | %x08 | Activate angle of attack / |
| | | performance mode |
+-----------+---------------+------------------------------+
| ALT | %x10 | Arm Altitude mode |
+-----------+---------------+------------------------------+
| VNAV | %x20 | Arm vertical nav mode |
+-----------+---------------+------------------------------+
| GP | %x40 | Arm approach mode vertical |
| | | portion |
+-----------+---------------+------------------------------+
| FLARE | %x80 | Arm flare mode |
+-----------+---------------+------------------------------+
| ROLL | %x01.00 | Activate wing leveler mode |
+-----------+---------------+------------------------------+
| HDG | %x02.00 | Activate heading mode |
+-----------+---------------+------------------------------+
| NAV | %x04.00 | Arm navigation mode |
+-----------+---------------+------------------------------+
| APPR | %x08.00 | Arm approach mode |
+-----------+---------------+------------------------------+
| YD | %x01.00.00.00 | Fixed Yaw Damper |
+-----------+---------------+------------------------------+
| SLIP | %x02.00.00.00 | Activate slip mode |
| | | (adjustable YD) |
+-----------+---------------+------------------------------+
| SLIPAPPR | %x04.00.00.00 | Activate approach slip mode |
| | | (adjustable YD) |
+-----------+---------------+------------------------------+
Table 38: afcs-fd-mode Dictionary
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3.5.156. FDMODEARM - Armed Flight Director Modes (XFS_AFCS_FD_MODE_*
Parameter ID: %x00.00.9a
Unit Usage: FD Number (0 for setting values)
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using afcs_fd_mode dictionary (See Table 38.)
3.5.157. ALTHOLDBUG - Altitude used by FD for altitude hold
Parameter ID: %x00.00.9b
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: FT multiplied by 10.
3.5.158. APMODE - Autopilot Modes
Parameter ID: %x00.00.9c
Unit Usage: AP Number (0 for setting value)
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using afcs_ap_mode dictionary (See Table 39.)
Table 39, below, shows the values defined in the afcs-ap-mode
Dictionary. These options represent the Vertical, lateral and yaw
modes of autopilot and throttle.
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+============+===============+================================+
| Name | Value | Definition |
+============+===============+================================+
| VERT-MASK | %xff | Vertical modes mask |
+------------+---------------+--------------------------------+
| LAT-MASK | %xff.00 | Lateral modes mask |
+------------+---------------+--------------------------------+
| THROT-MASK | %xff.00.00 | Throttle modes mask |
+------------+---------------+--------------------------------+
| YAW-MASK | %xff.00.00.00 | Yaw modes mask |
+------------+---------------+--------------------------------+
| PITCH | %x01 | Pitch mode |
+------------+---------------+--------------------------------+
| EPPITCH | %x02 | Pitch mode only for envelope |
| | | protection |
+------------+---------------+--------------------------------+
| ROLL | %x01.00 | Roll mode |
+------------+---------------+--------------------------------+
| EPROLL | %x02.00 | Roll mode only for envelope |
| | | protection |
+------------+---------------+--------------------------------+
| SPD | %x01.00.00 | Activate autothrottle speed |
| | | tracking |
+------------+---------------+--------------------------------+
| EPSPD | %x02.00.00 | Autothrottle only for envelope |
| | | protection (SPD mode) |
+------------+---------------+--------------------------------+
| AOA | %x04.00.00 | Activate autothrottle AoA |
| | | tracking |
+------------+---------------+--------------------------------+
| EPAOA | %x08.00.00 | Autothrottle only for envelope |
| | | protection (AOA mode) |
+------------+---------------+--------------------------------+
| TOGA | %x10.00.00 | Activate takeoff / go-around |
| | | throttle |
+------------+---------------+--------------------------------+
| EPTOGA | %x20.00.00 | Autothrottle only for envelope |
| | | protection (TOGA mode) |
+------------+---------------+--------------------------------+
| YAW | %x01.00.00.00 | Yaw mode |
+------------+---------------+--------------------------------+
| EPYAW | %x02.00.00.00 | Yaw envelope protection |
+------------+---------------+--------------------------------+
Table 39: afcs-ap-mode Dictionary
3.5.159. ICSSQL - Intercom Squelch (0-100)
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Parameter ID: %x00.00.9d
Unit Usage: Audio Panel Unit
SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: PERCENT (See Section 3.4.2.4.)
Units: PCENT.
3.5.160. PITCHBUG - Target pitch
Parameter ID: %x00.00.9e
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: PITCH (See Section 3.4.2.3.)
Units: DEG multiplied by 100.
3.5.161. PTSPEED - Power Turbine Speed (commonly N1)
Parameter ID: %x00.00.9f
Unit Usage: Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: PCENT multiplied by 1000.
3.5.162. GTSPEED - Gas Turbine Speed (commonly N2 or Ng)
Parameter ID: %x00.00.a0
Unit Usage: Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: PCENT multiplied by 1000.
3.5.163. TIT - Turbine Inlet Temperature
Parameter ID: %x00.00.a1
Unit Usage: Engine
SubUnit Usage: Turbo/0=Max
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: C multiplied by 100.
3.5.164. ITT - Inter-Turbine Temperature
Parameter ID: %x00.00.a2
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Unit Usage: Engine
SubUnit Usage: Sensor /0=Average
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: C multiplied by 100.
3.5.165. POWER - Power under current engine and environmental
conditions relative to engine design maximum
Parameter ID: %x00.00.a3
Unit Usage: Motor/Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Default Range: SERVO (See Section 3.4.2.1.)
Units: PCENT multiplied by 1000.
3.5.166. ENGSTATUS - Engine specific set of flags or values
Parameter ID: %x00.00.a4
Unit Usage: Motor/Engine
SubUnit Usage: Engine Specific
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.167. CABINALT - Cabin Equivalent Altitude
Parameter ID: %x00.00.a5
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: FT multiplied by 10.
3.5.168. CABINALTREQ - Cabin Equivalent Altitude
Parameter ID: %x00.00.a6
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: FT multiplied by 10.
3.5.169. DIFFPRES - Differential Pressure
Parameter ID: %x00.00.a7
Unit Usage: None
SubUnit Usage: None
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Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: PSI multiplied by 100.
3.5.170. DIFFPRESREQ - Requested Differential Pressure
Parameter ID: %x00.00.a8
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: PSI multiplied by 100.
3.5.171. FUELTEMP - Arbitrary Temperature in a location
Parameter ID: %x00.00.a9
Unit Usage: Engine/Fuel Tank
SubUnit Usage: SubLocation /0=Average, 1=Sump
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: C multiplied by 100.
3.5.172. ENGSTATE - Engine operating state
Parameter ID: %x00.00.aa
Unit Usage: Motor/Engine
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using engstate dictionary (See Table 40.)
Table 40, below, shows the values defined in the engstate Dictionary.
These options represent the States of engines.
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+=================+============+=============================+
| Name | Value | Definition |
+=================+============+=============================+
| UNKNOWN | %x00 | Engine Status Unknown |
+-----------------+------------+-----------------------------+
| OFF | %x01 | Engine is Off |
+-----------------+------------+-----------------------------+
| DRYMOTOR | %x02 | Engine Starting |
+-----------------+------------+-----------------------------+
| STARTING | %x03 | Engine Starting |
+-----------------+------------+-----------------------------+
| RUNNING | %x04 | Engine Running Normally |
+-----------------+------------+-----------------------------+
| FLAMEOUT | %x05 | Engine Flamed Out / Failure |
+-----------------+------------+-----------------------------+
| SHUTDOWN | %x06 | Engine Shutting Down |
+-----------------+------------+-----------------------------+
| SHUTOFF | %x07 | Engine Shut Off |
+-----------------+------------+-----------------------------+
| MODE-MASK | %xff | Mask for Engine State |
+-----------------+------------+-----------------------------+
| FLAG-IGNITION | %x01.00 | Ignition On |
+-----------------+------------+-----------------------------+
| FLAG-FUEL | %x02.00 | Fuel Shutoff Open |
+-----------------+------------+-----------------------------+
| FLAG-STARTER | %x04.00 | Starter On |
+-----------------+------------+-----------------------------+
| FLAG-GENERATOR | %x08.00 | Generator On |
+-----------------+------------+-----------------------------+
| FLAG-BLEED | %x10.00 | Bleed Air On |
+-----------------+------------+-----------------------------+
| FLAG-FIRE | %x01.00.00 | Fire Present |
+-----------------+------------+-----------------------------+
| FLAG-EXTINGUISH | %x02.00.00 | Extinguisher Dispensed |
+-----------------+------------+-----------------------------+
Table 40: engstate Dictionary
3.5.173. ENGSTATEREQ - Requested Engine operating state
Parameter ID: %x00.00.ab
Unit Usage: Motor/Engine
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using engstate dictionary (See Table 40.)
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3.5.174. BLEEDAIR - Bleed Air Level (Percent of Max)
Parameter ID: %x00.00.ac
Unit Usage: Motor/Engine
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Units: PCENT multiplied by 100.
3.5.175. BLEEDAIRREQ - Requested Bleed Air Level
Parameter ID: %x00.00.ad
Unit Usage: Motor/Engine
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Units: PCENT multiplied by 100.
3.5.176. LIGHTING - Lighting Color/Level
Parameter ID: %x00.00.ae
Unit Usage: System
SubUnit Usage: Specific
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Units: RGBA.
3.5.177. LIGHTINGREQ - Requested Lighting Color/Level
Parameter ID: %x00.00.af
Unit Usage: System
SubUnit Usage: Specific
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Units: RGBA.
3.5.178. ICING - Deicing State
Parameter ID: %x00.00.b0
Unit Usage: System/0=Aircraft
SubUnit Usage: Specific
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using icing_flag dictionary (See Table 41.)
Table 41, below, shows the values defined in the icing-flag
Dictionary. These options represent the Status of ice detection,
anti-ice and deicing systems.
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+=================+===============+================================+
| Name | Value | Definition |
+=================+===============+================================+
| ENGINE | %x01 | Engine Deicing/Anticing On |
+-----------------+---------------+--------------------------------+
| AIRFRAME | %x02 | Airframe Deicing/Anticing On |
+-----------------+---------------+--------------------------------+
| INSEP | %x04 | Inertial Separator Activated |
+-----------------+---------------+--------------------------------+
| PITOT | %x08 | Pitot/Static Heat Activated |
+-----------------+---------------+--------------------------------+
| PROPHEAT | %x10 | Propeller Heat Activated |
+-----------------+---------------+--------------------------------+
| WINDHEAT | %x20 | Windshield Heat Activated |
+-----------------+---------------+--------------------------------+
| CARBHEAT | %x40 | Carb Heat Activated |
+-----------------+---------------+--------------------------------+
| CARBICEDET | %x40.00 | Carb Icing Detected |
+-----------------+---------------+--------------------------------+
| ICEDET | %x80.00 | Icing Detected |
+-----------------+---------------+--------------------------------+
| ENGINE-FAIL | %x01.00.00 | Engine Deicing/Anticing Failed |
+-----------------+---------------+--------------------------------+
| AIRFRAME-FAIL | %x02.00.00 | Airframe Deicing/Anticing |
| | | Failed |
+-----------------+---------------+--------------------------------+
| INSEP-FAIL | %x04.00.00 | Inertial Separator Failed |
+-----------------+---------------+--------------------------------+
| PITOT-FAIL | %x08.00.00 | Pitot/Static Heat Failed |
+-----------------+---------------+--------------------------------+
| PROPHEAT-FAIL | %x10.00.00 | Propeller Heat Failed |
+-----------------+---------------+--------------------------------+
| WINDHEAT-FAIL | %x20.00.00 | Windshield Heat Failed |
+-----------------+---------------+--------------------------------+
| CARBHEAT-FAIL | %x40.00.00 | Carb Heat Failed |
+-----------------+---------------+--------------------------------+
| CARBICEDET-FAIL | %x40.00.00.00 | Carb Icing Detection Failed |
+-----------------+---------------+--------------------------------+
| ICEDET-FAIL | %x80.00.00.00 | Icing Detection Failed |
+-----------------+---------------+--------------------------------+
Table 41: icing-flag Dictionary
3.5.179. ICINGREQ - Requested Deicing State
Parameter ID: %x00.00.b1
Unit Usage: System/0=Aircraft
SubUnit Usage: Specific
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Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using icing_flag dictionary (See Table 41.)
3.5.180. LDGGEAR - Landing Gear State
Parameter ID: %x00.00.b2
Unit Usage: Wheel/0=Aircraft
SubUnit Usage: Specific
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using ldggear dictionary (See Table 42.)
Table 42, below, shows the values defined in the ldggear Dictionary.
These options represent the Status of retractable landing gear.
+=============+============+===============================+
| Name | Value | Definition |
+=============+============+===============================+
| UNKNOWN | %x00.00 | Gear Status Unknown |
+-------------+------------+-------------------------------+
| DOWN | %x00.01 | Landing Gear Down |
+-------------+------------+-------------------------------+
| UP | %x80.00 | Landing Gear Up |
+-------------+------------+-------------------------------+
| FLAG-FAILED | %x01.00.00 | Landing Gear System is Failed |
+-------------+------------+-------------------------------+
Table 42: ldggear Dictionary
3.5.181. LDGGEARREQ - Landing Gear State
Parameter ID: %x00.00.b3
Unit Usage: Wheel/0=Aircraft
SubUnit Usage: Specific
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using ldggear dictionary (See Table 42.)
3.5.182. CABINTEMP - Cabin Temperature in a zone
Parameter ID: %x00.00.b4
Unit Usage: Zone
SubUnit Usage: Sensor Number /0=Average
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: C multiplied by 100.
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3.5.183. CABINTEMPREQ - Requested Cabin Temperature in a zone
Parameter ID: %x00.00.b5
Unit Usage: Zone
SubUnit Usage: Sensor Number /0=Average
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: C multiplied by 100.
3.5.184. CHKLIST - Checklist Item
Parameter ID: %x00.00.b6
Unit Usage: Checklist Number
SubUnit Usage: Item Number /0=Title
Format: CASMSG (See Table 14.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.185. WBRANGE - Weight and envelope per configuration
Parameter ID: %x00.00.b7
Unit Usage: None
SubUnit Usage: None
Format: WBRANGE (See Table 26.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.186. WBSTARM - Arm for given station
Parameter ID: %x00.00.b8
Unit Usage: Configuration
SubUnit Usage: Station /0=total /1=total no fuel
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: IN multiplied by 1000.
3.5.187. WBSTMAXWEIGHT - Maximum weight at given station
Parameter ID: %x00.00.b9
Unit Usage: Configuration
SubUnit Usage: Station /0=total /1=total no fuel
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: LB multiplied by 10.
3.5.188. WBSTFLAGS - Flags about given station
Parameter ID: %x00.00.ba
Unit Usage: Configuration
SubUnit Usage: Station /0=total /1=total no fuel
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Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using station_flag dictionary (See Table 43.)
Table 43, below, shows the values defined in the station-flag
Dictionary. These options represent the Weight and balance station
types.
+===========+=======+======================================+
| Name | Value | Definition |
+===========+=======+======================================+
| FUEL | %x01 | This station is a fuel tank. Its |
| | | weight will be in XFS_PARAM_FUELLEVL |
+-----------+-------+--------------------------------------+
| HULL | %x02 | This station corresponds to the |
| | | basic empty aircraft |
+-----------+-------+--------------------------------------+
| FIXED | %x04 | This station's weight is not |
| | | adjustable |
+-----------+-------+--------------------------------------+
| PASSENGER | %x08 | This station corresponds to a |
| | | passenger location |
+-----------+-------+--------------------------------------+
| BAGGAGE | %x10 | This station corresponds to a |
| | | baggage location |
+-----------+-------+--------------------------------------+
Table 43: station-flag Dictionary
3.5.189. WBSTWEIGHT - Actual weight at given station
Parameter ID: %x00.00.bb
Unit Usage: Configuration
SubUnit Usage: Station /0=total /1=total no fuel
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: LB multiplied by 10.
3.5.190. TASEFF - Fuel Economy Relative to True Airspeed
Parameter ID: %x00.00.bc
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: NMPLB multiplied by 100000.
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3.5.191. GSEFF - Fuel Economy Relative to Groundspeed
Parameter ID: %x00.00.bd
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: NMPLB multiplied by 100000.
3.5.192. TIMETOEMPTY - Time to Empty
Parameter ID: %x00.00.be
Unit Usage: Engine /0=Aircraft
SubUnit Usage: 0 - smoothed, without reserve, 1 - smoothed, with
reserve, 2 - without reserve, 3 - with reserve
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: S multiplied by 10.
3.5.193. DISTTOEMPTY - Distance to Empty
Parameter ID: %x00.00.bf
Unit Usage: Engine /0=Aircraft
SubUnit Usage: 0 - smoothed, without reserve, 1 - smoothed, with
reserve, 2 - without reserve, 3 - with reserve
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: NM multiplied by 100.
3.5.194. FLIGHTSTATE - State of Flight
Parameter ID: %x00.00.c0
Unit Usage: None
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using flight_state dictionary (See Table 44.)
Table 44, below, shows the values defined in the flight-state
Dictionary. These options represent the Status of aircraft within
flight profile.
+===============+=======+=========================================+
| Name | Value | Definition |
+===============+=======+=========================================+
| UNKNOWN | %d0 | The state of the aircraft is not known |
+---------------+-------+-----------------------------------------+
| OFF | %d1 | The aircraft is completely powered down |
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+---------------+-------+-----------------------------------------+
| HIBERNATE | %d2 | Minimal aircraft systems online not |
| | | visible to the pilot |
+---------------+-------+-----------------------------------------+
| PREFLIGHT | %d3 | Minimal aircraft systems for pilot |
| | | interaction online |
+---------------+-------+-----------------------------------------+
| ENGINE-START | %d4 | Engine(s) are preparing to start or are |
| | | starting |
+---------------+-------+-----------------------------------------+
| PRETAXI | %d5 | Engine(s) are started, awaiting pre- |
| | | taxi items |
+---------------+-------+-----------------------------------------+
| TAXI | %d6 | Aircraft is ready or in process of |
| | | taxiing |
+---------------+-------+-----------------------------------------+
| RUNUP | %d7 | Aircraft is ready for, or in process of |
| | | performing runup |
+---------------+-------+-----------------------------------------+
| READY | %d8 | Aircraft is ready for and positioned |
| | | just short of takeoff |
+---------------+-------+-----------------------------------------+
| TAKEOFF | %d9 | Aircraft is in process of performing |
| | | takeoff |
+---------------+-------+-----------------------------------------+
| AFTER-TAKEOFF | %d10 | Aircraft is airborne immediately but |
| | | not yet configured for normal climb |
+---------------+-------+-----------------------------------------+
| DEPARTURE | %d11 | Aircraft is on a standard instrument |
| | | departure |
+---------------+-------+-----------------------------------------+
| CLIMB | %d12 | Aircraft is climbing but not on an |
| | | instrument departure |
+---------------+-------+-----------------------------------------+
| CRUISE | %d13 | Aircraft is at final cruise |
+---------------+-------+-----------------------------------------+
| DESCENT | %d14 | Aircraft is descending not on a |
| | | standard arrival |
+---------------+-------+-----------------------------------------+
| ARRIVAL | %d15 | Aircraft is on a standard arrival |
+---------------+-------+-----------------------------------------+
| APPROACH | %d16 | Aircraft is on an instrument approach |
| | | procedure |
+---------------+-------+-----------------------------------------+
| VISUAL | %d17 | Aircraft is flying a visual traffic |
| | | pattern |
+---------------+-------+-----------------------------------------+
| MISSED | %d18 | Aircraft is executing a missed approach |
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+---------------+-------+-----------------------------------------+
| SHUTDOWN | %d19 | Aircraft engines are shutting down or |
| | | have shut down |
+---------------+-------+-----------------------------------------+
| SECURE | %d20 | Aircraft systems are shutting down or |
| | | reconfiguring for preflight |
+---------------+-------+-----------------------------------------+
Table 44: flight-state Dictionary
3.5.195. UPDATESTATE - Status of any update
Parameter ID: %x00.00.c1
Unit Usage: None
SubUnit Usage: None
Format: UPDATE (See Table 27.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.196. TORQUEREQ - Requested Torque
Parameter ID: %x00.00.c2
Unit Usage: Motor/Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: LBFT multiplied by 100.
3.5.197. STKPITCHFRCE - Stick Pitch Force applied by the pilot,
positive value - push, negative value - pull
Parameter ID: %x00.00.c3
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: LB multiplied by 100.
3.5.198. STKROLLFRCE - Stick Roll Force applied by the pilot, positive
value - roll right, negative value - roll left
Parameter ID: %x00.00.c4
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: LB multiplied by 100.
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3.5.199. STKYAWFRCE - Pedal Yaw Force applied by the pilot, positive
value - right rudder, negative value - left rudder
Parameter ID: %x00.00.c5
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: LB multiplied by 100.
3.5.200. APPITCHFRCE - Auto Pilot Pitch Force exerted on control
surfaces, positive value - push, negative value - pull
Parameter ID: %x00.00.c6
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: LB multiplied by 100.
3.5.201. APROLLFRCE - Auto Pilot Roll Force exerted on control
surfaces, positive value - roll right, negative value - roll
left
Parameter ID: %x00.00.c7
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: LB multiplied by 100.
3.5.202. APYAWFRCE - Auto Pilot Yaw Force exerted on control surfaces,
positive value - right rudder, negative value - left rudder
Parameter ID: %x00.00.c8
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: LB multiplied by 100.
3.5.203. EFBPARAM - Up to 64-character, NULL terminated parameter value
Parameter ID: %x00.00.c9
Unit Usage: EFB ID
SubUnit Usage: XFS_EFB_PARAM_*
Format: STRING (See Table 13.)
Range: parameter MUST NOT be sent with a range attribute.
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3.5.204. OILPRESCOMP - Compensated Oil Pressure
Parameter ID: %x00.00.ca
Unit Usage: Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: PSI multiplied by 100.
3.5.205. MACHBUG - Target Mach
Parameter ID: %x00.00.cb
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: MACH multiplied by 10000.
3.5.206. AOART - Angle of attack rate of change
Parameter ID: %x00.00.cc
Unit Usage: Source
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: DEG multiplied by 1000.
3.5.207. TASBUG - Target true airspeed
Parameter ID: %x00.00.cd
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: KT multiplied by 100.
3.5.208. GSBUG - Target groundspeed
Parameter ID: %x00.00.ce
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: KT multiplied by 100.
3.5.209. AOABUG - Bugged AOA
Parameter ID: %x00.00.cf
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Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: DEG multiplied by 1000.
3.5.210. ECUTIME - ECU Hours
Parameter ID: %x00.00.d1
Unit Usage: Engine
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
Units: HR multiplied by 1000.
3.5.211. DBASE - Active database information
Parameter ID: %x00.00.d2
Unit Usage: CPU ID
SubUnit Usage: Process ID
Format: DBASE (See Table 31.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.212. EAS - Equivalent Airspeed
Parameter ID: %x00.00.d3
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: KT multiplied by 100.
3.5.213. EASRT - Equivalent Airspeed Rate of Change
Parameter ID: %x00.00.d4
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: KTPS multiplied by 100.
3.5.214. EASBUG - Target equivalent airspeed
Parameter ID: %x00.00.d5
Unit Usage: None
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
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Units: KT multiplied by 100.
3.5.215. POWERREQ - Requested power as percent of engine design maximum
Parameter ID: %x00.00.d6
Unit Usage: Motor/Engine
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: PCENT multiplied by 1000.
3.5.216. BRAKE - Wheel brake status
Parameter ID: %x00.00.d7
Unit Usage: Left=1,Right=2,No direction=0
SubUnit Usage: Specific
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using brake dictionary (See Table 45.)
Table 45, below, shows the values defined in the brake Dictionary.
These options represent the Status of wheel brakes.
+=============+============+========================+
| Name | Value | Definition |
+=============+============+========================+
| UNKNOWN | %x00.00 | Brake Status Unknown |
+-------------+------------+------------------------+
| NONE | %x00.01 | Brakes not pressed |
+-------------+------------+------------------------+
| MAX | %x80.00 | Max Braking |
+-------------+------------+------------------------+
| PARK | %x01.00.00 | Parking Brake Engaged |
+-------------+------------+------------------------+
| FLAG-FAILED | %x02.00.00 | Brake System is Failed |
+-------------+------------+------------------------+
Table 45: brake Dictionary
3.5.217. BRAKEREQ - Amount of brake requested
Parameter ID: %x00.00.d8
Unit Usage: Left=1,Right=2,No direction=0
SubUnit Usage: Specific
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Values interpreted using brake dictionary (See Table 45.)
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3.5.218. NAVSQL - Communication Squelch (0-100)
Parameter ID: %x00.00.d9
Unit Usage: Radio ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
Default Range: PERCENT (See Section 3.4.2.4.)
Units: PCENT.
3.5.219. STATIONID - VOR Station ID decoded from Morse code
Parameter ID: %x00.00.da
Unit Usage: Radio ID
SubUnit Usage: None
Format: STRING (See Table 13.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.220. SVPARAM - Synthetic Vision parameters. Subunit is one of
XFS_SV_PARAM_*
Parameter ID: %x00.00.db
Unit Usage: SYNVIS ID
SubUnit Usage: XFS_SV_PARAM_*
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.221. FDCDISEL - Global selection of which CDI the flight director
should track
Parameter ID: %x00.00.dc
Unit Usage: None
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.222. BLOODOXY - Blood oxygen level of given seat occupant
Parameter ID: %x00.00.dd
Unit Usage: Seat position, 0=Lowest of all seats, 1=Pilot,
2=Copilot, etc
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
Default Range: THOUPERCENT (See Section 3.4.2.5.)
Units: PCENT multiplied by 1000.
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3.5.223. PULSE - Pulse rate of given seat occupant
Parameter ID: %x00.00.de
Unit Usage: Seat position, 0=Worst of all seats (too low or high),
1=Pilot, 2=Copilot, etc
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
Units: CPM multiplied by 1000.
3.5.224. BREATHS - Breathing rate of given seat occupant
Parameter ID: %x00.00.df
Unit Usage: Seat position, 0=Worst of all seats (too low or high),
1=Pilot, 2=Copilot, etc
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
Units: CPM multiplied by 1000.
3.5.225. CARBMONOX - Carbon Monoxide levels detected by sensor
Parameter ID: %x00.00.e0
Unit Usage: Carbon Monoxide Sensor ID
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
Units: PPM multiplied by 100.
3.5.226. FLOWRATE - Oxygen flow rate
Parameter ID: %x00.00.e1
Unit Usage: Seat position, 0=Worst of all seats (too low or high),
1=Pilot, 2=Copilot, etc
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
Units: LPM multiplied by 100.
3.5.227. TANKPRES - Oxygen tank pressure
Parameter ID: %x00.00.e2
Unit Usage: Tank number, 0=Worst of all tanks (too low or high),
1=Tank 1, 2=Tank 2, etc
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
Units: PSI multiplied by 100.
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3.5.228. RNAVVS - Vertical speed computed from RNAV
Parameter ID: %x00.00.e3
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: FPM multiplied by 1.
3.5.229. COMPRESET - Selected COM Radio Preset (0=Non-preset frequency)
Parameter ID: %x00.00.e4
Unit Usage: Radio
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
Values interpreted using preset dictionary (See Table 46.)
Table 46, below, shows the values defined in the preset Dictionary.
These options represent the XSEDE Preset Frequency.
+========+=========+===========================+
| Name | Value | Definition |
+========+=========+===========================+
| MANUAL | %d0 | Manual Tuning (no preset) |
+--------+---------+---------------------------+
| LAST | %xff.fe | Last selected frequency |
+--------+---------+---------------------------+
Table 46: preset Dictionary
3.5.230. COMNAME - Name of COM Radio or Preset Frequency
Parameter ID: %x00.00.e5
Unit Usage: Radio
SubUnit Usage: 0=Radio /1+=Presets
Format: STRING (See Table 13.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.231. NAVPRESET - Selected NAV Radio Preset (0=Non-preset frequency)
Parameter ID: %x00.00.e6
Unit Usage: Radio
SubUnit Usage: None
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
Values interpreted using preset dictionary (See Table 46.)
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3.5.232. NAVNAME - Name of NAV Radio or Preset Frequency
Parameter ID: %x00.00.e7
Unit Usage: Radio
SubUnit Usage: 0=Radio /1+=Presets
Format: STRING (See Table 13.)
Range: parameter MUST NOT be sent with a range attribute.
3.5.233. VNORTH - North component of velocity in true world coordinates
Parameter ID: %x00.00.e8
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: KT multiplied by 100.
3.5.234. VEAST - East component of velocity in true world coordinates
Parameter ID: %x00.00.e9
Unit Usage: Source ID
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: KT multiplied by 100.
3.5.235. ENGPOWER - Current Engine Power
Parameter ID: %x00.00.ea
Unit Usage: Engine
SubUnit Usage: 0=Shaft Power/1=Input Power Consumption/ 2+(even)=
Component Shaft Power, 3+(odd)= Component Power Consumption
Format: UINT (See Table 8.)
Range: parameter MAY be sent with a range attribute.
Units: KW multiplied by 1000.
3.5.236. CHARGE - Measured remaining battery charge
Parameter ID: %x00.00.eb
Unit Usage: Battery ID/0=Sum of all
SubUnit Usage: None
Format: SINT (See Table 17.)
Range: parameter MAY be sent with a range attribute.
Units: AH multiplied by 1000.
3.5.237. CHARGETOT - Computed remaining charge
Parameter ID: %x00.00.ec
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Unit Usage: Power System ID/0=Sum of all
SubUnit Usage: 0 = current total, 1 = total at end of flight
Format: SINT (See Table 17.)
Range: parameter MUST NOT be sent with a range attribute.
Units: AH multiplied by 1000.
4. Message Transport
4.1. Message Composition
Application software on a node determines when information or raw
data need to be sent onto the network. These transmissions are done
as messages with raw data and messages with parameters. If
subsequent information or raw data having the same message class, ID,
and flags occur in a timely fashion, they MAY be coalesced into a
single message.
For each parameter to be sent, the common header (See Section 3.2)
the common data items MUST be populated. In addition, the Ident and
Parameter Data MUST be populated with the corresponding data as per
Section 3.5. The length in the common header MUST represent the
actual length of the data, however, the parameter must be padded to a
size that is a multiple of four octets.
The message header MUST be populated with the corresponding data as
per Section 3.1, the message number MUST be monotonically increasing
with an arbitrary initial value, and then the length in the common
header MUST be set equal to the sum of the padded parameter length
values. Once this assembly process is complete, the message may be
transmitted.
4.2. Message Signing
Body text
4.3. Message Transmission and Reliability
XSEDE is designed to be used with a broadcast UDP protocol however,
there is no requirement to do so. Each endpoint MUST specify a
listening address and port number with the default being 224.0.2.69
on port 20234. The actual address and port number are to be chosen
by the system designer / installer for their particular needs.
[RFC5771] specifies IPv4 Multicast Address Assignments and SHOULD be
followed.
If the XSEDE message is successfully transmitted, no further action
is required.
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4.4. Message Reception & decoding
XSEDE messages are received on the address and port that was
configured in the prior section. Upon receiving a message, the src
id and message number MUST be examined to ensure that this message is
neither out of order nor a duplicate: Since lower level network
tolopogies may affect the potential for packet delay and
retransmission, each node MUST maintain a message look-back window
size setting, default 4. Each node MUST also record of the last
message number received from a node. If a subsequent message number
is received out of order andis within the look back window, the
message MUST be discarded. Otherwise, the message is a valid
message. This arrangement accounts for both integer overflows and
node restarts. Then, if the message is considered valid, each XSEDE
node MUST examine each parameter in the XSEDE message to determine if
it requires local processing. Local processing is beyond the scope
of this document.
Since there is no assured message delivery, all parameter
interpretations MUST be idempotent to ensure multiple
interpretations, or execution results in the same outcome.
4.5. Message Signing
Since XSEDE operates on a closed network, message signing is not
currently supported but may be added in the future.
5. Example Message Flows
This section illustrates XSEDE features by example. The first
example controls the radio.
5.1. Adjust radio
This example sets the radio Set Radio frequency and squelch by
broadcasting USERSEL parameters. If a node controlling the radio
receives the request, it will respond with a result similar to the
one shown afterwards.
5.1.1. Message Header
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1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| src id | message number |
| 1001 | 20 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| msg class | message ID | flags |
| 3 = OP | FLIGHTDATA 2 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| tcid | len |
| NONE 0 | %x10 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
...
Figure 4: Message Header Format
src id:
UINT16; This value was set to 1001 decimal at installation time.
message number:
UINT16; 20 decimal for illustration purposes.
msg class:
UINT8; "OP" value 3 decimal.
message ID:
UINT8; FLIGHTDATA decimal 2
flags:
UINT16; LEVEL-A decimal 5; See Table 3.
tcid:
t-NONE; See Table 4.
len:
UINT16 ; 0x10, or decimal 16 bytes.
5.1.2. Frequency Message Header
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1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unit | SubUnit |
| 2 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Parameter Data Len | Ident |
| 4 | COMFREQKHZ %x00.00.24 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Format | Confidence | Expire | Pflags |
| UINT 2 | USERSEL 192 | %x00 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: Parameter Data :
| 122750 or 0x0001 df7e |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 5: Setting frequency to 122.750
Unit:
UINT16; decimal 2 to match the requested radio.
SubUnit:
UINT16; 0 to signify the radio itself.
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; COMFREQKHZ - Communication Frequency, value %x00.00.24
See Section 3.5.
Format:
UINT (OCTET): decimal 2. See Section 3.3.
Confidence:
decimal 192 (OCTET): USERSEL. See Table 5.
Expire:
OCTET; Time to live. %x00 to not expire. See Section 3.2.2 for
encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 3
Parameter Data:
*(OCTET) value would be 122750, 0x0001 df7e.
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5.1.3. Squelch Message Header
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unit | SubUnit |
| 2 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Parameter Data Len | Ident |
| 4 | COMSQL %x00.00.28 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Format | Confidence | Expire | Pflags |
| UINT 2 | USERSEL 192 | %x00 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: Parameter Data :
| 53 or 0x0000 0035 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 6: Setting Squelch to 53
Unit:
UINT16; decimal 2 to match the requested radio.
SubUnit:
UINT16; 0 to signify the radio itself.
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; COMSQL - Communication Squelch (0-100), value %x00.00.28
See Section 3.5.
Format:
UINT (OCTET): decimal 2. See Section 3.3.
Confidence:
decimal 192 (OCTET): USERSEL. See Table 5.
Expire:
OCTET; Time to live. %x00 to not expire. See Section 3.2.2 for
encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 3
Parameter Data:
*(OCTET) value would be 53, 0x0000 0035.
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5.1.4. Radio Status Report
After the above parameters affect a change in the radio, or as part
of the radio's regularly scheduled parameter broadcast, a message
like the following will be transmitted. It has almost all the same
values as the original message but would likely include other
parameters as well. Only the changed parameters are described.
The expire time is chosen at 2-3 times the scheduled broadcast time
to ensure a fresh message is received within the valid time period
should one be lost.
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| src id | message number |
| 1777 | 1255 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| msg class | message ID | flags |
| 3 = OP | FLIGHTDATA 2 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| tcid | len |
| NONE 0 | %x20 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unit | SubUnit |
| 2 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Parameter Data Len | Ident |
| 4 | COMFREQKHZ %x00.00.24 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Format | Confidence | Expire | Pflags |
| UINT 2 | RAW / R 10 | %xC9 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: Parameter Data :
| 122750 or 0x0001 df7e |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unit | SubUnit |
| 2 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Parameter Data Len | Ident |
| 4 | COMSQL %x00.00.28 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Format | Confidence | Expire | Pflags |
| UINT 2 | RAW / R 10 | %xC9 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: Parameter Data :
| 53 or 0x0000 0035 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Figure 7: Radio Response Message
src id:
UINT16; This value is different than the prior message because
this message is sent by the node controlling the radio. It was
set to 1777 decimal at installation time.
message number:
UINT16; decimal 1255 for illustrative purposes. Note: this value
is the current message sequence number for node 1777.
Confidence:
decimal 10 (OCTET): RAW / REPORTED in both parameters since this
value is the actual reported value from the device. See Table 5.
Expire:
OCTET; Time to live. %xC9 to expire in about 15 seconds. See
Section 3.2.2 for encoding.
5.2. Deploy Landing Gear Example
Landing Gear changes are different than radio changes in that it may
take several seconds to affect a change. In this scenario, we will
see a report by the node controlling the landing gear, followed by a
parameter showing the user selecting a new value. Next, there will
be a series of parameter broadcasts that showing the gear moving into
position.
5.2.1. Initial Gear State Message
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1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| src id | message number |
| 2222 | 3400 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| msg class | message ID | flags |
| 3 = OP | FLIGHTDATA 2 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| tcid | len |
| NONE 0 | %x20 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unit | SubUnit |
| 1 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Parameter Data Len | Ident |
| 4 | LDGGEAR %x00.00.b2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Format | Confidence | Expire | Pflags |
| UINT 2 | RAW / R 10 | %x77 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: Parameter Data :
| 0x8000 - up. |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unit | SubUnit |
| 2 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Parameter Data Len | Ident |
| 4 | LDGGEAR %x00.00.b2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Format | Confidence | Expire | Pflags |
| UINT 2 | RAW / R 10 | %x77 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: Parameter Data :
| 0x8000 - up. |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 8: Initial gear state message
Above we see a periodic message indicating that each of the two
landing gear are in an up position. If these were the only two
landing gear, an alternative representation would be to send a single
parameter with a a unit of zero to indicate all gear is in an up
position. The attributes of the message are as follows:
src id:
UINT16; This value was set to 2222 decimal at installation time.
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message number:
UINT16; 3400 decimal for illustration purposes.
msg class:
UINT8; "OP" value 3 decimal.
message ID:
UINT8; FLIGHTDATA decimal 2
flags:
UINT16; LEVEL-A decimal 5; See Table 3.
tcid:
t-NONE; See Table 4.
len:
UINT16 ; 0x20 bytes.
Parameter (First):
Unit:
UINT16; Decimal 1 for landing gear unit 1
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See
Section 3.5.
Format:
UINT (OCTET): decimal 2. See Section 3.3.
Confidence:
decimal 10 (OCTET): RAW. It is the value reported by the
actuator. See Table 5.
Expire:
OCTET; Time to live. %x77 to expire in 2.9 seconds. See
Section 3.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 3
Parameter Data:
*(OCTET) value is 0x8000.
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Parameter (Second):
Unit:
UINT16; Decimal 2 for landing gear unit 2
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See
Section 3.5.
Format:
UINT (OCTET): decimal 2. See Section 3.3.
Confidence:
decimal 10 (OCTET): RAW. It is the value reported by the
actuator. See Table 5.
Expire:
OCTET; Time to live. %x77 to expire in 2.9 seconds. See
Section 3.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 3
Parameter Data:
*(OCTET) value is 0x8000.
5.2.2. Gear Position Request
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1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| src id | message number |
| 1001 | 2001 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| msg class | message ID | flags |
| 3 = OP | FLIGHTDATA 2 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| tcid | len |
| NONE 0 | %x10 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unit | SubUnit |
| 0 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Parameter Data Len | Ident |
| 4 | LDGGEARREQ %x00.00.b3 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Format | Confidence | Expire | Pflags |
| UINT 2 | RAW / R 10 | %x00 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: Parameter Data :
| 0x0001, down. |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 9: Request Gear Position Down
Below we see an example message that could have been made by a
landing gear button.
src id:
UINT16; This value was set to 1001 decimal at installation time.
message number:
UINT16; 2001 decimal for illustration purposes.
msg class:
UINT8; "OP" value 3 decimal.
message ID:
UINT8; FLIGHTDATA decimal 2
flags:
UINT16; LEVEL-A decimal 5; See Table 3.
tcid:
t-NONE; See Table 4.
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len:
UINT16 ; 0x10 or 16 decimal bytes.
Parameter (Only):
Unit:
UINT16; Decimal 0 for the plane's landing gear.
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEARREQ - Landing Gear State Request, value
%x00.00.b3 See Section 3.5.
Format:
UINT (OCTET): decimal 2. See Section 3.3.
Confidence:
decimal 192 (OCTET): USERSEL. See Table 5.
Expire:
OCTET; Time to live. %x00 to not expire. See Section 3.2.2 for
encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 3
Parameter Data:
*(OCTET) 0x0001, down.
5.2.3. First Changed Gear State Message
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1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| src id | message number |
| 2222 | 3401 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| msg class | message ID | flags |
| 3 = OP | FLIGHTDATA 2 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| tcid | len |
| NONE 0 | %x20 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unit | SubUnit |
| 1 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Parameter Data Len | Ident |
| 4 | LDGGEAR %x00.00.b2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Format | Confidence | Expire | Pflags |
| UINT 2 | RAW / R 10 | %x77 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: Parameter Data :
| 0x3901, in transit |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unit | SubUnit |
| 2 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Parameter Data Len | Ident |
| 4 | LDGGEAR %x00.00.b2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Format | Confidence | Expire | Pflags |
| UINT 2 | RAW / R 10 | %x77 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: Parameter Data :
| 0x4121, in transit |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 10: First Changed Gear State Message
The above message was sent while the landing gear was in transit. It
shows the position values for each gear to be different, but both in
transit. The expiry is set to 0x77 and about 2.9 seconds as the
sending node intends to send updates at least once per second. The
longer time period accounting for potential losses.
src id:
UINT16; This value was set to 2222 decimal at installation time.
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message number:
UINT16; 3401 decimal for illustration purposes.
msg class:
UINT8; "OP" value 3 decimal.
message ID:
UINT8; FLIGHTDATA decimal 2
flags:
UINT16; LEVEL-A decimal 5; See Table 3.
tcid:
t-NONE; See Table 4.
len:
UINT16 ; 0x20 bytes.
Parameter (First):
Unit:
UINT16; Decimal 1 for landing gear unit 1
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See
Section 3.5.
Format:
UINT (OCTET): decimal 2. See Section 3.3.
Confidence:
decimal 10 (OCTET): RAW. It is the value reported by the
actuator. See Table 5.
Expire:
OCTET; Time to live. %x77 to expire in 2.9 seconds. See
Section 3.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 3
Parameter Data:
*(OCTET) value is 0x3901, in transit .
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Parameter (Second):
Unit:
UINT16; Decimal 2 for landing gear unit 2
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See
Section 3.5.
Format:
UINT (OCTET): decimal 2. See Section 3.3.
Confidence:
decimal 10 (OCTET): RAW. It is the value reported by the
actuator. See Table 5.
Expire:
OCTET; Time to live. %x77 to expire in 2.9 seconds. See
Section 3.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 3
Parameter Data:
*(OCTET) value is 0x4121, in transit.
5.2.4. Final Gear State Message
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1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| src id | message number |
| 2222 | 3402 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| msg class | message ID | flags |
| 3 = OP | FLIGHTDATA 2 | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| tcid | len |
| NONE 0 | %x20 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unit | SubUnit |
| 1 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Parameter Data Len | Ident |
| 4 | LDGGEAR %x00.00.b2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Format | Confidence | Expire | Pflags |
| UINT 2 | RAW / R 10 | %xDB | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: Parameter Data :
| 0x0001, down. |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unit | SubUnit |
| 2 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Parameter Data Len | Ident |
| 4 | LDGGEAR %x00.00.b2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Format | Confidence | Expire | Pflags |
| UINT 2 | RAW / R 10 | %xDB | LEVEL-A 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: Parameter Data :
| 0x0001, down. |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 11: Final Gear State Message
The mesage above indicates that both landing gear are down (value
0x0001) and the message expiry has increased to 0xDB, or about 59
seconds. Since the gear are now in a static position, the node only
intends to send updates every 20 seconds or so following the expire a
message at about three times the sending frequency. In practice, to
ensure delivery the long expiry should be introduced after at least
one prior notification that it reached that state.
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src id:
UINT16; This value was set to 2222 decimal at installation time.
message number:
UINT16; 3402 decimal for illustration purposes.
msg class:
UINT8; "OP" value 3 decimal.
message ID:
UINT8; FLIGHTDATA decimal 2
flags:
UINT16; LEVEL-A decimal 5; See Table 3.
tcid:
t-NONE; See Table 4.
len:
UINT16 ; 0x20 bytes.
Parameter (First):
Unit:
UINT16; Decimal 1 for landing gear unit 1
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See
Section 3.5.
Format:
UINT (OCTET): decimal 2. See Section 3.3.
Confidence:
decimal 10 (OCTET): RAW. It is the value reported by the
actuator. See Table 5.
Expire:
OCTET; Time to live. %x77 to expire in 2.9 seconds. See
Section 3.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 3
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Parameter Data:
*(OCTET) value is 0x0001, down.
Parameter (Second):
Unit:
UINT16; Decimal 2 for landing gear unit 2
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See
Section 3.5.
Format:
UINT (OCTET): decimal 2. See Section 3.3.
Confidence:
decimal 10 (OCTET): RAW. It is the value reported by the
actuator. See Table 5.
Expire:
OCTET; Time to live. %x77 to expire in 2.9 seconds. See
Section 3.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 3
Parameter Data:
*(OCTET) value is 0x0001, down.
6. IANA Considerations
This memo includes no request to IANA.
7. Security Considerations
This document should not affect the security of the Internet.
This protocol is currently designed to be deployed on an isolated
private network. As such, message encryption, authenticity, and
modification detection are not protocol priorities.
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7.1. Interception
Message Interception is not considered a significant threat for XSEDE
because there is no private data in the system.
7.2. Impersonation and MITM
Impersonation and Man in the Middle (MITM) are unlikely because
normally the network is physically isolated and not routed to other
networks. Strategies for signing messages are a future
consideration.
7.3. Denial of Service
Due to secure installation and physical isolation, Denial of Service
is not a significant concern.
8. References
8.1. Normative References
[RFC0768] Postel, J., "User Datagram Protocol", STD 6, RFC 768,
DOI 10.17487/RFC0768, August 1980,
<https://www.rfc-editor.org/info/rfc768>.
[RFC0791] Postel, J., "Internet Protocol", STD 5, RFC 791,
DOI 10.17487/RFC0791, September 1981,
<https://www.rfc-editor.org/info/rfc791>.
[RFC2640] Curtin, B., "Internationalization of the File Transfer
Protocol", RFC 2640, DOI 10.17487/RFC2640, July 1999,
<https://www.rfc-editor.org/info/rfc2640>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>.
[IEEE8023] IEEE, "IEEE Standard for Ethernet",
DOI 10.1109/ieeestd.2018.8457469, 21 September 2018,
<http://dx.doi.org/10.1109/ieeestd.2018.8457469>.
[ISO88591] International Organization for Standardization,
"Information technology -- 8-bit single-byte coded graphic
character sets -- Part 1: Latin alphabet No. 1", ISO/IEC
8859-1:1998, 1998.
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[DO-178C] RTCA - Radio Technical Commission for Aeronautics, "DO-
178C - Software Considerations in Airborne Systems and
Equipment Certification", December 2011,
<https://my.rtca.org/
productdetails?id=a1B36000001IcmrEAC>.
[GLD90] Garmin International, Inc., "GDL 90 Data Interface
Specification", June 2007,
<https://www.faa.gov/air_traffic/technology/adsb/archival/
media/GDL90_Public_ICD_RevA.PDF>.
8.2. Informative References
[RFC5771] Cotton, M., Vegoda, L., and D. Meyer, "IANA Guidelines for
IPv4 Multicast Address Assignments", BCP 51, RFC 5771,
DOI 10.17487/RFC5771, March 2010,
<https://www.rfc-editor.org/info/rfc5771>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
Authors' Addresses
Mark Spencer
Avilution
Huntsville, AL
United States of America
Email: markster@avilution.com
Edward T Guy, III (editor)
EMC Software
Jersey City, NJ
United States of America
Email: edguy@eguy.org
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