ISO 11783-7:2015

INTERNATIONAL ISO
STANDARD 11783-7
Third edition
2015-03-15
Tractors and machinery for
agriculture and forestry — Serial
control and communications data
network —
Part 7:
Implement messages application layer
Tracteurs et matériels agricoles et forestiers — Réseaux de
commande et de communication de données en série —
Partie 7: Couche d’application de base
Reference number
ISO 11783-7:2015(E)
©
ISO 2015

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ISO 11783-7:2015(E)

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© ISO 2015
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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Published in Switzerland
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ISO 11783-7:2015(E)

Contents Page
Foreword .iv
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 General requirements and recommendations . 2
3.1 General . 2
3.2 Signal characterization . 2
3.3 Message format . 2
3.4 Implement configuration offsets . 5
Annex A (normative) Parameter definitions . 6
Annex B (normative) Parameter groups .121
Annex C (informative) Tractor control messages — Examples .175
Annex D (informative) Implement control of tractor facilities — Control implementation .184
Bibliography .185
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ISO 11783-7:2015(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 23, Tractors and machinery for agriculture and
forestry, Subcommittee SC 19, Agricultural electronics.
This third edition cancels and replaces the second edition (ISO 11783-7:2009) which has been technically
revised.
ISO 11783 consists of the following parts, under the general title Tractors and machinery for agriculture
and forestry — Serial control and communications data network:
— Part 1: General standard for mobile data communication
— Part 2: Physical layer
— Part 3: Data link layer
— Part 4: Network layer
— Part 5: Network management
— Part 6: Virtual terminal
— Part 7: Implement messages application layer
— Part 8: Power train messages
— Part 9: Tractor ECU
— Part 10: Task controller and management information system data interchange
— Part 11: Mobile data element dictionary
— Part 12: Diagnostics services
— Part 13: File server
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ISO 11783-7:2015(E)

— Part 14: Sequence control
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ISO 11783-7:2015(E)

Introduction
[1]
ISO 11783 specifies a communications system for agricultural equipment based on the ISO 11898-1
[2]
protocol. SAE J1939 documents, on which parts of ISO 11783 are based, were developed jointly for use
in truck and bus applications and for construction and agriculture applications. Joint documents were
completed to allow electronic units that meet the truck and bus SAE J1939 specifications to be used by
agricultural and forestry equipment with minimal changes.
General information on ISO 11783 is to be found in ISO 11783-1. The purpose of ISO 11783 is to provide
an open, interconnected system for on-board electronic systems. It is intended to enable electronic
control units (ECUs) to communicate with each other, providing a standardized system.
The International Organization for Standardization (ISO) draws attention to the fact that it is claimed
that compliance with this part of ISO 11783 may involve the use of a patent concerning the controller
area network (CAN) protocol referred to throughout the document.
ISO takes no position concerning the evidence, validity and scope of this patent.
The holder of this patent has ensured ISO that he is willing to negotiate licences under reasonable and
non-discriminatory terms and conditions with applicants throughout the world. In this respect, the
statement of the holder of this patent right is registered with ISO. Information may be obtained from:
Robert Bosch GmbH
Wernerstrasse 51
Postfach 30 02 20
D-70442 Stuttgart-Feuerbach
Germany
Attention is drawn to the possibility that some of the elements of this part of ISO 11783 may be the subject
of patent rights other than those identified above. ISO shall not be held responsible for identifying any
or all such patent rights.
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INTERNATIONAL STANDARD ISO 11783-7:2015(E)
Tractors and machinery for agriculture and forestry —
Serial control and communications data network —
Part 7:
Implement messages application layer
SAFETY PRECAUTIONS — Caution is to be taken with any automatic control of implements carried
out using a message defined in this part of ISO 11783. See ISO 11783-9 for safe-mode operations.
1 Scope
ISO 11783 as a whole specifies a serial data network for control and communications on forestry or
agricultural tractors and mounted, semi-mounted, towed or self-propelled implements. Its purpose is
to standardize the method and format of transfer of data between sensors, actuators, control elements
and information storage and display units, whether mounted on, or part of, the tractor or implement.
This part of ISO 11783 describes the implement messages application layer of the network, specifying
the message set and defining the messages used for communication with and between tractors and
connected implements.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 639 (all parts), Codes for the representation of names of languages
ISO 11783-1:2007, Tractors and machinery for agriculture and forestry — Serial control and communications
data network — Part 1: General standard for mobile data communication
ISO 11783-3, Tractors and machinery for agriculture and forestry — Serial control and communications
data network — Part 3: Data link layer
ISO 11783-5, Tractors and machinery for agriculture and forestry — Serial control and communications
data network — Part 5: Network management
ISO 11783-6, Tractors and machinery for agriculture and forestry — Serial control and communications
data network — Part 6: Virtual terminal
ISO 11783-9, Tractors and machinery for agriculture and forestry — Serial control and communications
data network — Part 9: Tractor ECU
ISO 11783-10, Tractors and machinery for agriculture and forestry — Serial control and communications
data network — Part 10: Task controller and management information system data interchange
ISO 11783-12, Tractors and machinery for agriculture and forestry — Serial control and communications
data network — Part 12: Diagnostics services
IEC 61162-3, Maritime navigation and radio communication equipment and systems — Digital interfaces —
Part 3: Serial data instrument network
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3 General requirements and recommendations
3.1 General
The message set specified by this part of ISO 11783 is designed to support the basic needs of an implement
for information from a tractor, as well as limited controls enabling coordination between implement and
tractor. The message set supports messages containing information on
— time,
— ground speed,
— distance,
— navigation,
— PTO (power take-off) parameters,
— three-point hitch,
— general process data, and
— lighting function parameters.
Some of the messages are regularly repeated at fixed intervals and others are transmitted upon request
only. The specific transmission requirements for each message are defined in Annex B.
The message parameters are defined in Annex A; the parameter groups are specified in Annex B.
See Annex C for examples of tractor control messages.
3.2 Signal characterization
The ISO 11783 network has been designed with the intent of providing current data from a control
function (CF) that is located in an electronic control unit (ECU) to, and for use by, other CFs that are
located in the same or in other ECUs on the network. ISO 11783-1 lists the definitions of the CF and ECU
terms.
It is recommended that the time between physical data acquisition of a signal and the transmission of
the data not exceed twice the repetition rate defined for the data.
3.3 Message format
3.3.1 General
The ISO 11783 network message format uses the parameter group number as the label for a group of
parameters. Each parameter within the group can be expressed as characters, as scaled data defined by
the ranges given in 3.3.3, or as function states consisting of one or more bits. Characters are transmitted
with the left-most character first.
Numerical parameters consisting of two or more data bytes shall be transmitted least significant byte
first. When a parameter is placed in more than one byte because of its location in the data field, the least
significant bits (Lsb) of the parameter are placed in the least significant byte with the remaining most
significant bits (Msb) placed in the next higher byte starting at the first bit. See Figure 1.
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Data
b5 b4 b3 b2 b1
MsbLsb
Placement MsbByte 8Lsb MsbByte 7Lsb
(Big Endian)
8 765432 187654 321
b5 b4 b3 b2 b1
MsbLsb
a) Data parameter of less than one byte crossing a byte boundary
Data
b10 b9 b8 b7 b6 b5 b4 b3 b2 b1
MsbLsb
Placement MsbByte 2Lsb MsbByte 1Lsb
(Big Endian)
87 6543 21 87 65432 1
b10 b9 b8 b7 b6 b5 b4 b3 b2 b1
MsbLsb
b) Data parameter larger than one byte ending on a byte boundary
Data
b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1
MsbLsb
Placement MsbByte 8Lsb MsbByte 7Lsb
(Big Endian)
87 6543 21 87654 321
b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1
MsbLsb
c) Data parameter larger than one byte starting on a byte boundary
Figure 1 — Placement of data parameters in more than one byte
3.3.2 Data types
Each parameter is identified as being of either the command or measured data type.
— Command
Command data specifies the desired state of a multistate parameter, function or numerical value of
a set point as requested by a transmitting CF. Specific confirmation of a command is not necessarily
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ISO 11783-7:2015(E)

ensured. For example, the command may request that a solenoid be activated, yet no measurement
be taken to ensure the solenoid has accomplished its function.
The tractor is not expected to automatically execute any given command. Commands for control
affect the change or introduction of motion or power into the system, and may be issued in parallel
with other commands from within various tractor systems. Each command must be considered
with other tractor controls and operating conditions, and only executed if the tractor control system
considers it to be appropriate.
EXAMPLE 1 Engage PTO, extend auxiliary valve state, activate headlight high-beam, move rear hitch.
— Measured
Measured data conveys the current value of a parameter, as measured or observed by the
transmitting CF, determining the condition of the defined parameter.
EXAMPLE 2 Ground-based speed, hitch position, PTO engagement, implement in-work state.
3.3.3 Parameter ranges
Table 1 defines the ranges used to determine the validity of a transmitted signal, Table 2 those ranges
used to denote the state of a discrete parameter, and Table 3 those used to denote the state of a control
mode command. The values in the range “error indicator” provide the means for a CF to immediately
indicate that valid parametric data are not currently available due to some type of error in the sensor,
subsystem or CF.
If a CF failure prevents transmission of valid data for a parameter, the appropriate error indicator given
in Tables 1 or 2 shall be used in place of that parameter’s data. However, if the measured or calculated
data has yielded a value that is valid, yet which exceeds the defined parameter range, the error indicator
shall not be used. The data shall be transmitted using the appropriate minimum or maximum parameter
value. If the sensor cannot determine if the measured or calculated data are valid, it shall send the error
indicator.
3.3.4 Adding to parameter groups
Several of the parameter groups contain bytes that are undefined and which may be replaced with new
parameters defined at a future date. If existing parameter group definitions do not permit the inclusion
of new parameters, then a new parameter group may be defined.
See ISO 11783-1 for additional definitions and the abbreviations of instructions for requesting that
parameters be added to parameter groups and new parameter group numbers be created.
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Table 1 — Transmitted signal ranges
Range name 1 byte 2 bytes 4 bytes ASCII
0 to 250 0 to 64 255 0 to 4 211 081 215 1 to 254
Valid signal
00 to FA 0000 to FAFF 00000000 to FAFFFFFF 01 to FE
16 16 16 16 16 16 16 16
4 211 081 216 to 4 227 858
Parameter-spe- 251 64 256 to 64 511
431 None
cific indicator FB FBxx
16 16
FBxxxxxx
16
Reserved range 4 227 858 432 to 4 261 412
252 to 253 64 512 to 65 023
for future indica- 863 None
FC to FD FC00 to FDFF
16 16 16 16
tor bits FC000000 to FDFFFFFF
16 16
4 261 412 864 to 4 278 190
254 65 024 to 65 279 0
Error indicator 079
FE FExx 00
16 16 16
FExxxxxx
16
Not available,
not installed,
4 278 190 080 to 4 294 967
not requested or 255 65 280 to 65 535 255
294
take no action FF FFxx FF
16 16 16
FFxxxxxx
16
(leave function
as is)
Table 2 — Transmitted values for discrete parameters (measured)
Range name Transmitted value
Disabled (Off, passive, etc.) 00
Enabled (On, active, etc.) 01
Error indicator 10
Not available or not installed 11
Table 3 — Transmitted values for control commands
Range name Transmitted value
Command to disable function (turn Off, etc.) 00
Command to enable function (turn On, etc.) 01
Reserved 10
Don’t care/take no action (leave function as is) 11
For future compatibility, except where noted in the particular message definition, reserved bits within
a message are to be set to “all 1’s” to indicate “Not Available”.
Unique to Part 7 are several messages which utilize single-bit parameters such as availability of
individual features. Portions of these messages may be reserved and additional single-bit indicators.
It is important to note the expected value of these reserved parameters in the message definitions as
they may differ from the rules defined above. In some cases, the default value is zero (“0”) for forward
compatibility. The value of zero indicates “not supported” in these messages.
3.4 Implement configuration offsets
The configuration of a tractor/implement connection and the offset to and from the tractor and
implement reference points are used in the navigational parameters and in the implement configuration
of process data messages. See ISO 11783-10.
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ISO 11783-7:2015(E)

Annex A
(normative)

Parameter definitions
A.1 Time (UTC)
The following three parameters provide the current time at the Universal Time Coordinate (UTC). If the
local hour offset parameter (A.4) is equal to 125 (FA ), then the time parameter is the local time instead
16
of UTC.
Data length: 3 bytes
Resolution: Byte 1 = 0,25 s/bit, 0 s offset - SPN 959
Byte 2 = 1 min/bit, 0 min offset - SPN 960
Byte 3 = 1 h/bit, 0 h offset - SPN 961
Operating range: Byte 1 = 0 s to 59,75 s; Byte 2 = 0 min to 59 min; Byte 3 = 0 h to 23 h
Type: Measured
A.2 Date
The following three parameters provide the current date at the Universal Time Coordinate (UTC). If the
local hour offset parameter (A.4) is equal to 125 (FA ), then the date parameter is the local date instead
16
of UTC date.
Data length: 3 bytes
Resolution: Byte 1 = 1 month/bit, 0 month offset - SPN 963
Byte 2 = 0,25 d/bit, 0 day offset - SPN 962
Byte 3 = 1 y/bit, 1985 year offset - SPN 964
Operating range: Byte 1 = 1 month to 12 months
Byte 2 = 0,25 d to 31,75 d
Byte 3 = 1985 (year) to 2235 (year)
Type: Measured
NOTE A value of 0 for the month (byte 1) is null. The value 1 identifies January, 2 identifies February, etc. A
value of 0 for the day (byte 2) is null. The values 1, 2, 3 and 4 are used to identify the first day of the month; 5, 6, 7
and 8 identify the second day of the month, etc. A value of 0 for the year (byte 3) identifies the year 1985; a value
of 1 identifies 1986, etc.
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A.3 Local minute offset
Local minute offset is the number of minutes between the Universal Time Coordinate (UTC) time and
date and a local time and date. This value is added to UTC time and date to determine the local time and
date. The local offset is a positive value for times east of the Prime Meridian to the International Date
Line. The local offset is a negative value for times west of the Prime Meridian to the International Date
Line. The local minute offset is only applicable when the time and date parameters are reported as UTC
time and date.
Data length: 1 byte
Resolution: 1 min/bit, −125 min offset
Operating range: −59 min to 59 min
Type: Measured
SPN: 1601
Note: This parameter was harmonized with SAE in a technical corrigenda published 2004-10-15. Prior
to that Technical Corrigenda the parameter was defined as follows:
Local time offset in minutes from a reference time (UTC).
Data length: 1 byte
Resolution: 1 min/bit, 0 min offset
Operating range: 0 min to 59 min
Type: Measured
A.4 Local hour offset
Local hour offset is the number of hours between the Universal Time Coordinate (UTC) time and date
and a local time and date. This value is added to UTC time and date to determine the local time and date.
The local offset is a positive value for times east of the Prime Meridian to the International Date Line.
The local offset is a negative value for times west of the Prime Meridian to the International Date Line.
Data length: 1 byte
Resolution: 1 h/bit, −125 h offset
Operating range: −23 h to 23 h
Type: Measured
SPN: 1602
The time and date parameters shall be Universal Time Coordinate (UTC) time, to be used with the
local hour offset value for determining the local time. See Table A.1 for interpretations of time and date
parameters for local hour offset non-operating ranges.
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Table A.1 — Local hour offset interpretations
Local hour offset value Interpretation of received parameters
Time and date Local offsets
−125 to −24 Time standard unknown Unknown
(00 to 65 )
16 16
−23 to 23
UTC time and date Local time offsets
(66 to 94 )
16 16
24 to 123
Time standard unknown Unknown
(95 to F8 )
16 16
124
UTC time and date No offset provided
(F9 )
16
125
Local time and date No offset provided
(FA )
16
126 to 130
Time standard unknown Unknown
(FB to FF )
16 16
NOTE This parameter was harmonized with SAE in a technical corrigenda published 2004–10–15. Prior to
that Technical Corrigenda the parameter was defined as follows:
Local time offset in hours from a reference time (UTC).
Data length: 1 byte
Resolution: 1 h/bit, − 24 h offset
Operating range: − 24 h to 23 h
Type: Measured
A.5 Ground-based machine speed
Actual ground speed of a machine, measured by a sensor such as radar.
Data length: 2 bytes
Resolution: 0,001 m/s/bit, 0 m/s offset; upper byte resolution = 0,256 m/s/bit
Data range: 0 m/s to 64,255 m/s
Type: Measured
SPN: 1859
A.6 Ground-based machine distance
Actual distance travelled by a machine, based on measurements from a sensor such as radar.
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When the distance exceeds 4 211 081,215 m, the value shall be reset to zero and incremented as
additional distance accrues.
Data length: 4 bytes
Resolution: 0,001 m/bit
Data range: 0 m to 4 211 081,215 m
Type: Measured
SPN: 1860
A.7 Ground-based machine direction
Measured signal indicating either forward or reverse as the direction of travel.
When the speed is zero, indicate the last travel direction until a different direction is detected.
NOTE Forward and reverse refer to the normal directions of travel of the tractor or implement chassis. The
direction does not change when the operator’s perspective is changed (i.e. when operator station is reversed).
EXAMPLE Operator station reversed.
Data length: 2 bits
Value Meaning
00 Reverse
01 Forward
10 Error indication
11 Not available
Type: Measured
SPN: 1861
A.8 Wheel-based machine speed
The value of the speed of a machine as calculated from the measured wheel or tail-shaft speed.
Data length: 2 bytes
Resolution: 0,001 m/s/bit, 0 m/s offset
upper byte resolution = 0,256 m/s/bit
Data range: 0 m/s to 64,255 m/s
Type: Measured
SPN: 1862
A.9 Wheel-based machine distance
Distance travelled by a machine as calculated from wheel or tail-shaft speed.
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When the distance exceeds 4 211 081,215 m, the value shall be reset to zero and incremented as
additional distance accrues.
Data length: 4 bytes
Resolution: 0,001 m/bit
Data range: 0 m to 4 211 081,215 m
Type: Measured
SPN: 1863
A.10 Wheel-based machine direction
Measured signal indicating either forward or reverse as the direction of travel.
When the speed is zero, indicate the last travel direction until a different direction is detected or selected
and engaged.
NOTE Forward and reverse refer to the normal directions of travel of the tractor or implement chassis. The
direction does not change when the operator’s perspective is changed (i.e. when operator station is reversed).
EXAMPLE Operator station reversed.
Data length: 2 bits
Value Meaning
00 Reverse
01 Forward
10 Error indication
11 Not available
Type: Measured
SPN: 1864
A.11 Key switch state
Indicates the key switch state of the tractor or power unit.
This does not indicate unforeseen power interruptions such as those caused by starting the engine.
Data length: 2 bits
Value Meaning
00 Key switch Off
01 Key switch not Off
10 Error indication
11 Not available
Type: Measured
SPN: 1865
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A.12 Maximum time of tractor power
Maximum time of remaining tractor or power-unit-supplied electrical power at the current load.
This parameter may be estimated rather than being a measured value.
Data length: 1 byte
Resolution: 1 min/bit, 0 offset
Data range: 0 to 250
Type: Measured
SPN: 1866
A.13 Maintain ECU power
Request to the Tractor ECU to maintain ECU_PWR power for the next 2 s.
Data length: 2 bits
Value Meaning
00 No further requirement for ECU_PWR
01 Requirement for 2 s more of ECU_PWR
10 Reserved
11 Don’t care
Type: Command
SPN: 1867
A.14 Maintain actuator power
Request to the Tractor ECU to maintain PWR power for the next 2 s.
Data length: 2 bits
Value Meaning
00 No further requirement for PWR
01 Requirement for 2 s more for PWR
10 Reserved
11 Don’t care
Type: Command
SPN: 1868
A.15 Implement transport state
Indicates the transport state of an implement connected to a tractor or power unit.
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Data length: 2 bits
Value Meaning
00 Implement may not be transported
01 Implement may be transported
10 Error indication
11 Not available
Type: Measured
SPN: 1869
A.16 Implement park state
Indicates the state of an implement where it may be disconnected from a tractor or power unit.
Data length: 2 bits
Value Meaning
00 Implement may not be disconnected
01 Implement may be disconnected
10 Error indication
11 Not available
Type: Measured
SPN: 1870
A.17 Implement ready-to-work state
Indicates that an implement is connected to a tractor or power unit and is ready for work.
Data length: 2 bits
Value Meaning
00 Implement is not ready for field work
01 Implement is ready for field work
10 Error indication
11 Not available
Type: Measured
SPN: 1871
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A.18 Navigation location parameters
1)
ISO 11783 networks shall use the navigation location parameters specified in IEC 61162-3 [NMEA 2000 ].
NOTE The actual location in the navigation parameters shall be reported for the Navigation Reference Point
(NRP) on the tractor/implement. The definition of the Navigation Reference Point and the tractor/implement
coordinate system are specified in ISO 11783-10. The NRP may be the antenna location in case only a GNSS
receiver is available but it may also be the location of a reference point projected on the ground surface below the
tractor/implement in case the GNSS location data are corrected for the roll and pitch of the tractor/implement.
A.19 Hitch parameters
A.19.1 Front hitch posit
...