CallFunctionByIndex (FUN)¶

FUNCTION CallFunctionByIndex : __XWORD

This function calls a function specified by their POU index keep in mind, that the called function is subject to a number of limitations:

• its name must begin with “Callback”

• its output value must be a DWORD on 32 bit and a LWORD on 64 bit systems. This can be achieved by using __XWORD.

• it must have exactly 3 input values with a data size of 4 bytes each on 32 bit and 8 bytes each on 64 bit systems. This can be achieved by using __XWORD.

InOut:

Scope	Name	Type	Comment
Return	CallFunctionByIndex	__XWORD	Return value of the called function.
Input	pPOUFunc	CAA.PVOID	Pointer to function to call
	dwParam1	__XWORD	prameter 1
	dwParam2	__XWORD	prameter 2
	dwParam3	__XWORD	prameter 3
	peError	POINTER TO ERROR