SysPortIn (FUN)

FUNCTION SysPortIn : BYTE

<description>This function reads the current BYTE-value at the given port address.</description> <result><p>RESULT: Input port value that was read.</p></result>

InOut:

Scope	Name	Type	Comment
Return	SysPortIn	BYTE
Input	ulAddress	UDINT	<param name=”ulAddress” type=”IN”>Port address</param>
	pResult	POINTER TO RTS_IEC_RESULT	<param name=”pResult” type=”OUT”>Pointer to runtime system error code (see CmpErrors.library)</param>