Version 2.0.3 Preliminary Documentation – May be Subject to Change 24-36
Use
Axiomatic
Proprietary B
True or False
True
If the Command PGN is not Proprietary B, this setpoint
is only used by the Feedback. This setpoint determines
if the Proprietary B scheme describe in
section 2
applies. If it does, Byte[0] of the received message must
be a $0C and Byte[1] must be $01 for the controller to
respond to the command.
Minimum
Command
-100000.0
to
Breakpoint Command
0.0
If and only if the output Control Input is "J1939
Command" will this setpoint be used, in which case it
acts as the "Minimum" input in Figure
1
. Otherwise it is
ignored.
Breakpoint
Command
Minimum Command
to
Maximum Command
50.0
If and only if the output Control Input is "J1939
Command" will this setpoint be used, in which case it
acts as the "Breakpoint" input in Figure
1
. Otherwise it
is ignored.
Maximum
Command
Breakpoint Command
to
100000.0
100.0
If and only if the output Control Input is "J1939
Command" will this setpoint be used, in which case it
acts as the "Maximum" input in Figure
1
. Otherwise it is
ignored.
J1939 Command Data Options
Name Range
Default
Notes
Data Size
1, 2 or 4
2=WORD
This setpoint determines how the data will be
interpreted in the message. When set to 1 Byte (BYTE)
the data is read as an unsigned char. When set to 2
Bytes (WORD) the data is read as an unsigned int (16
bit). When set to 4 Bytes (DWORD) the data is read as
an unsigned long (32 bit). WORDs and DWORDs are
read LSB first.
Data Index in
8-BYTE
Array (LSB)
0 to (8-Data Size)
2
This setpoint determines which location the LSB of the
data will be read from the 8-Byte data array. For
BYTEs, this can be set from 0 to 7. For WORDs, this
can be set from 0 to 6. For DWORDS, this can be set
from 0 to 4.
Resolution
-100000.0 to 100000
1.0
This setpoint determines the scaling done on the
measured data after it is read from the bus.
Offset
-10000 to 10000
0.0
This setpoint determines the value that is
added
to the
data
after
it is scaled.
4.7.
J1939 Feedback Message (Output) Setpoints
There are three setpoints per channel that are associated with the J1939 feedback message that
can be sent by the ECU to the network bus.
Name Range
Default
Notes
Feedback
PGN
65280 to 65535
Command
PGN
Feedback messages are always sent using a
Proprietary B PGN
Feedback
Data Index
0 to 6
2
When "Use Axiomatic Proprietary B" is TRUE, the
Feedback is sent using the Axiomatic Proprietary B
scheme described in
section 2
.
Repetition
Rate
0ms to 60000ms
0ms
This setpoint determines how often the message is sent
to the bus. When set to zero, the feedback is only
available upon request.
It is the user’s responsibility to select a repetition
rate that will not violate the J1939 standard.
