TCP_Read (FB)¶

FUNCTION_BLOCK TCP_Read EXTENDS CBM.LTrig

This function block serves to read data from the previously established connection given in hConnection. As long as xEnable is TRUE the handle of the connection is valid. The pointer pData specifies the memory area to write the read data to. szSize defines the max number of bytes to read. When the data was read successfully, xReady is set to TRUE and szCount indicates the actually read number of bytes.

InOut:

Scope	Name	Type	Comment	Inherited from
Input	xEnable	BOOL	TRUE: Action starts FALSE: Action stops, outputs xDone, xBusy, xError are resetted	LTrig
Output	xDone	BOOL	TRUE: Action successfully completed	LTrig
	xBusy	BOOL	TRUE: Function block active	LTrig
	xError	BOOL	TRUE: Error occurred, function block aborts action FALSE: No error	LTrig
Input	hConnection	CAA.HANDLE
	szSize	CAA.SIZE
	pData	CAA.PVOID
Output	eError	ERROR
	xReady	BOOL
	szCount	CAA.SIZE