Cm598CanMsgRecEvt (FB)

FUNCTION_BLOCK PUBLIC FINAL Cm598CanMsgRecEvt EXTENDS AbbLCon3

Function Block which is used to read CAN messages of the specified CAN Identifier that where received by the specified CAN interface. 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 LCon Function Block. It is intended to be used in task that are triggered by external events (CouplerEvent1_CAN - CouplerEvent6_CAN).

InOut:

Scope	Name	Type	Initial	Comment	Inherited from
Input	Enable	BOOL	FALSE	A rising edge (Enable = TRUE) starts a single operation, the output Busy goes to TRUE. All other inputs are read and considered continuously. A falling edge (Enable = FALSE) aborts the operation, if BUSY=TRUE (Note: During Aborting the Busy is still TRUE). Afterwards all outputs will be reset. For executing another operation the Enable input needs to be retriggered by another rising edge!	AbbLCon3
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 Enable is set to FALSE.	AbbLCon3
	Busy	BOOL	FALSE	Operation is running (while outputs Done and Error are FALSE)	AbbLCon3
	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 Enable is set to FALSE. The output ErrorID gives more details about the error.	AbbLCon3
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 describing error condition
	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