COM.Open (FB; Prefix como)

By use of this function block of the ⇘ CAA_SerialCom.library a COM port can be opened and configured. The availability of ports depends on the hardware. The configuration of a serial interface is effected by the input pParameterList. The pointer pParameterList has to be assigned to an array of ⇘ COM.PARAMETER comprising all configuration parameters required by the COM interface. udiListLength indicates the number of configuration parameters.

Input:

xExecute	BOOL	see: Guidelines for CAA libs
udiListLength	UDINT	Number of parameters contained in list
pParameterList	CAA.PVOID	Pointer on list of COM parameter values (COM.PARAMETER)

Output:

xDone	BOOL	see: Guidelines for CAA libs
xBusy	BOOL	see: Guidelines for CAA libs
xError	BOOL	see: Guidelines for CAA libs
eError	COM.ERROR	Error ID
hCom	CAA.HANDLE	Handle of COM interface