This function of the ⇘ CAA_Callback.Library serves to call an IEC function indirectly via its POU index. The following constraints have to be regarded:

The name of the function must have a prefix „Callback“.
The function must have a return value of a data type of 4 byte length.
The function must have exactly three parameters of a data type of 4 byte length.

Input:

pPOUFunc	CAA.PVOID	POU-Index of the function to be called
dwParam1	DWORD	first parameter of the function to be called
dwParam2	DWORD	second parameter of the function to be called
dwParam3	DWORD	third parameter of the function to be called
peError	POINTER TO CB.Error	pointer on error ID

Output:

dwValue

DWORD

Return of the called function