SA0061: Unusual operation on pointer

Function	Determines operations on variables of type POINTER TO, which are not = (equality), <> (inequality), + (addition) or ADR.
Reason	Pointer arithmetic is generally permitted in TwinCAT and can be used in a meaningful way. The addition of a pointer with an integer value is therefore classified as a common operation on pointers. This makes it possible to process an array of variable length using a pointer. All other (unusual) operations with pointers are reported with SA0061.
Importance	High
PLCopen rule	E2/E3

Samples:

PROGRAM MAIN
VAR 
    pINT  : POINTER TO INT;
    nVar  : INT;
END_VAR

pINT := ADR(nVar);               // no error
pINT := pINT * DWORD#5;          // => SA0061 
pINT := pINT / DWORD#2;          // => SA0061 
pINT := pINT MOD DWORD#3;        // => SA0061 
pINT := pINT + DWORD#1;          // no error
pINT := pINT - DWORD#1;          // => SA0061