SA0053: Too big bitwise shift

Detects whether or not the data type width of the operand has been exceeded in the case of a bitwise shift (bit shift) of operands

Justification: If a shift operation exceeds the data type width, then a constant 0 is generated.

If a rotation shift exceeds the data type width, then it is difficult to read. Therefore, the rotation value should be shortened.

Importance: High

PROGRAM PLC_PRG
VAR
    byTemp1 : BYTE;
    wTemp2 : WORD;
    dwTemp3 : DWORD;
    lwTemp4 : LWORD;
END_VAR

byTemp1 := SHR(byTemp1, BYTE#25);
wTemp2 := SHL(wTemp2, BYTE#45);
dwTemp3 := ROR(dwTemp3, BYTE#78);
lwTemp4 := ROL(lwTemp4, BYTE#111);