Cm598CanMsgRecDirect (FB)

FUNCTION_BLOCK PUBLIC FINAL Cm598CanMsgRecDirect EXTENDS AC500_StateMachine.AbbETrig3

Function Block which is used to read CAN messages of the specified CAN Identifier that where received by the CAN interface specified with input Device. In order to receive any CAN message, the CAN protocol and a receive buffer for the desired CAN ID have to be configured in the PLC Application. The function block behavior is implemented according to the ETrig Function Block. It reads the messages directly (blocking) from the receive buffer.

InOut:

Scope	Name	Type	Initial	Comment	Inherited from
Input	Execute	BOOL	FALSE	A rising edge starts the operation, the output Busy goes to TRUE. In the first cycle all other inputs are read and stored, afterwards they are ignored. A falling edge does not stop the operation. After Done = TRUE or Error = TRUE and Execute = FALSE all outputs will be reset.	AbbETrig3
Output	Done	BOOL	FALSE	Operation is completed without error (while outputs Busy and Error are FALSE). This output is TRUE for at least one cycle or until Execute is set to FALSE	AbbETrig3
	Busy	BOOL	FALSE	Operation is running (while outputs Done and Error are FALSE)	AbbETrig3
	Error	BOOL	FALSE	Operation is stopped with error (while outputs Busy and Done are FALSE). This output is TRUE for at least one cycle or until Execute is set to FALSE. The output ErrorID gives more details about the error.	AbbETrig3
Input	Device	IDeviceCM598Can	0	Instance of CM598Can device
	CanId	UDINT	0	CAN Identifier, “base frame format” (11bit, CAN 2.0A) or “extended frame format” (29bit, CAN 2.0B) can be used
	IdExt	BOOL	FALSE	if FALSE CanId is in “base frame format”, if TRUE CanId is in “extended frame format”
	Data	POINTER TO Cm598CanMessageType	0	Pointer to variable where the read CAN message is copied to
Output	ErrorID	ERROR_ID	ERROR_ID.NO_ERROR	Error code that describes the occured error
	Num	UINT	0	Number of CAN messages currently stored in the receive buffer
	NumRec	UDINT	0	Total number of received CAN messages with the specified identifier
	NumRej	UDINT	0	Total number of rejected CAN messages with the specified identifier
	NumOwr	UDINT	0	Total number of overwritten CAN messages with the specified identifier