Read (FB)

FUNCTION_BLOCK Read EXTENDS CBM.ETrigToA

Function block to read data from the serial port

InOut:

Scope	Name	Type	Comment	Inherited from
Input	xExecute	BOOL	Rising edge: Action starts Falling edge: Resets outputs If a falling edge occurs before the function block has completed its action, the outputs operate in the usual manner and are only reset if either the action is completed or in the event of an error. In this case, the corresponding output values (xDone, xError) are present at the outputs for exactly one cycle.	ETrigToA
	xAbort	BOOL	TRUE: Action is stopped immediately and all outputs are reset to their initial values.	ETrigToA
	udiTimeOut	UDINT	Defines the time (µs) after which an FB (e.g. requiring an external acknowledgement) aborts operation due to a timeout with error message.	ETrigToA
Output	xDone	BOOL	TRUE: Action successfully completed	ETrigToA
	xBusy	BOOL	TRUE: Function block active	ETrigToA
	xError	BOOL	TRUE: Error occurred, function block aborts action FALSE: No error	ETrigToA
	xAborted	BOOL	TRUE : Action aborted by user	ETrigToA
Input	hCom	CAA.HANDLE	Handle to the open COM port. Ist returned by the COM.Open function block.
	pBuffer	CAA.PVOID	Pointer to a buffer to get the received data from the COM port
	szBuffer	CAA.SIZE	Maximum size of the pBuffer parameter in bytes
Output	eError	ERROR	Local library error ID (0: no error; 5001: time out)
	szSize	CAA.SIZE	Returns the number of received data bytes in pBuffer