Tab: J1939-ECU – TX Signals

This dialog shows the parameter groups that are transmitted to all other ECUs (broadcast) or to a specific ECU (P2P). In this dialog, you can activate and deactivate individual groups and modify their parameters. You can also add new groups or signals to the list.

Enable	: The parameter group is transmitted. : The parameter group is not transmitted for a local device. For a remote device, the PLC does not process this group.
Type	Broadcast: The parameter group is transmitted to all ECUs. Peer-to-Peer P2P: The parameter group is transmitted to a specific ECU.
Add PG	Opens the Add Parameter Group dialog.
Add Signal	Opens the Add Signal dialog. The button is enabled only if you have selected a parameter group or a signal of a parameter group.
Data Layout Editor	Opens the Data Layout Editor dialog. The button is enabled only if you have selected a parameter group or a signal of a parameter group.

Parameter group properties

Table 26. General

PGN	The "parameter group number" is a unique number for addressing a parameter group.
Name	Name of the parameter group
Description	Description of the parameter group
Length	Length of the message data (0..1785 bytes) Due to the maximum array length of 8 bytes, messages with over 8 bytes are transmitted as multipackages.

Table 27. Transmission settings

These settings are provided only for the TX parameter groups of local devices.
Priority	Priority of the parameter group (0..7) Priority 0 is the highest and 7 is the lowest.
Target address	The target address is needed for P2P parameter groups only.
Transmission mode	Determines the time when a parameter group is transmitted (for local devices). Mode change: The PG is transmitted when the value of the signal changes. Cyclic: The PG is transmitted after a specified number of PLC cycles (see cycle time factor). On request: The PG is transmitted on request of another device. Application-controlled: The PG is transmitted when triggered by the application.
Cycle time factor	Number of PLC cycles after which the parameter group is transmitted. Only applies for cyclic transmission.

Signal parameters

Table 28. General

SPN	Suspect Parameter Number One of the numbers assigned by the SAE for a specific parameter in a parameter group.
Name	Name of the parameter
Description	Description of the parameters
Length (Bits)	Length of the signal (in bits: 1...14280)
Byte position (0..1784)	Start byte in the parameter group (0...1784)
Bit position (0..7)	Bit position of the start byte (0..7)

Table 29. Conversion

Conversion	`True`: The value is calculated with scaling and offset.
RAW Data Type	Format of the raw data: Unsigned / Signed / Float / Double
Byte Order	Little Endian or Big Endian of the raw signal
Scaling	Factor (for Conversion = `True`)
Offset	Offset (for Conversion = `True`)
Minimal Value	Expected minimum value of the converted signal (for informational purposes only)
Maximal Value	Expected maximum value of the converted signal (for informational purposes only)
Unit	Unit of the converted signal
ICE Datatype	Resulting data type of the I/O channels