The IEC operator is used for modulo division.

The result of the function is the non-negative, integer remainder of division.

Permitted data types: ‎BYTE‎, ‎WORD‎, ‎DWORD‎, ‎LWORD‎, ‎SINT‎, ‎USINT‎, ‎INT‎, ‎UINT‎, ‎DINT‎, ‎UDINT‎, ‎LINT‎, ‎ULINT‎

NOTICE

Division by zero may have different results depending on the target system.

Examples

Result in Var1: 1

ST

var1 := 9 MOD 2;

FBD