COM.Write (FB; Prefix comw)

By use of this function block of the ⇘ CAA_SerialCom.library data can be written on the COM port identified by its handle. The memory content, the pointer pBuffer refers to, should not be changed while writing. Neither the size of the memory structure containing the bytes to be sent nor the number of bytes to be sent will be checked!

If the stability of the pointer on the data structures and their contents cannot be ensured during an online change, the online change has to be prohibited by the function block with the help of functions which are part of the CAA.Application library.

Input:

xExecute	BOOL	see: ⇘ “CAA 指南”
xAbort	BOOL	see: ⇘ “CAA 指南”
udiTimeOut	UDINT	see: ⇘ “CAA 指南”
hCom	CAA.HANDLE	Handle of COM port
pBuffer	CAA.PVOID	Address, the data to be sent can be retrieved; this address can be determined employing the operator
szSize	CAA.SIZE	Number of bytes to be written; can be determined by employing the operator

Output:

xDone	BOOL	see: ⇘ “CAA 指南”
xBusy	BOOL	see: ⇘ “CAA 指南”
xError	BOOL	see: ⇘ “CAA 指南”
eError	COM.ERROR	Error ID