Unsafe_SDG_Receiver (FB)¶

FUNCTION_BLOCK Unsafe_SDG_Receiver

J1939-76 Safety SDG receiver.

Unsafe_SDG_Receiver does receive J1939-76 SDG messages (SHM and SDM) for a configured SDG produced by a J1939SafetySafe.Safe_SDG_Producer and send by a Unsafe_SDG_Sender via CAN driver.

Basics and data flow¶

For an overview of general data flow see the J1939SafetySafe library main documentation and the J1939 Safety example.project function block J1939_example_CFC.

Sequence of operation on update of SHM¶

SHM_RecvCnt is incremented signaling the SHM data are updated and valid
SHM data are updated

Sequence of operation on update of SDM¶

SDM_RecvCnt is incremented signaling the SDM data are updated and valid
SDM data are updated

InOut:

Scope	Name	Type	Initial	Comment
Input	`xEnable`	`BOOL`	TRUE	Enable the receiver.
	`dwPGN`	`DWORD`		Parameter Group Number (PGN).
	`usiSrcAddr`	`USINT`	0	Source Address.
	`itfCL2Driver`	`ICL2Driver`		CAN driver to use.
Output	`xBusy`	`BOOL`	FALSE	In operation.
	`xError`	`BOOL`	FALSE	Error occured.
	`eErrorID`	ERROR	ERROR.NO_ERROR	Error status
	`SDGU`	`J1939SafetyItf.SAFETY_DATA_GROUP_UNSAFE`