Cm598CanMsgRec (FB)

FUNCTION_BLOCK PUBLIC FINAL Cm598CanMsgRec EXTENDS Cm598Base

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 asyncronously (non blocking) from the receive buffer.

InOut:

Scope	Name	Type	Initial	Comment	Inherited from
Input	Device	IDeviceCM598Can	0	Instance of CM598Can device	Cm598Base
Output	ErrorID	ERROR_ID	ERROR_ID.NO_ERROR	Error code that describes the occured error	Cm598Base
Input	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	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