When a DM1 function is configured, for instance SPN 91, FMI 3, it can be assigned to any
output.
DM1 Functions are active if the DM1 is active or unacknowledged in the DCU.
4.4.6 J1939 Outputs
The DCU has a variety of predefined messages available to be transmitted over J1939.
home / dcu / i/o configuration / j1939 outputs
Transmit J1939 On Idle Bus
means that the DCU will continue to transmit J1939 data even
though the DCU is not receiving any data.
Transmit DM1
means that the DCU will transmit DM1 for the configured transmit J1939
SPNs.
Event Type
FMI
Low
High
Warning
17
15
Alarm / Load Reduction
18
16
Shutdown
1
0
Out of Range
2
Receive Transmitted Signals
makes it possible for the DCU to receive SPNs transmitted by
the DCU.
4.4.6.1 J1939
The DCU is able to broadcast J1939 data by mapping any input signal to any standard
J1939 SPN as long as the quantity of the signals match.
Select the SPN which the DCU should transmit. This can be accomplished either by
manually selecting the DPN in the left side column or by using the builtin search mechanism
of the DCU.
Once a SPN is selected, the DCU will present a list of possible source signals in a drop
down combo box called “Signal to be Transmitted”.
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