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