Operator - Test if first input is less than second input.
IN2 : ANY Second input
Q : BOOL TRUE if IN1 < IN2
Both inputs must have the same type. In LD language, the input rung (EN) enables the operation, and the output rung is the result of the comparison. In IL language, the LT instruction performs the comparison between the current result and the operand. The current result and the operand must have the same type.
Comparisons can be used with strings. In that case, the lexical order is used for comparing the input strings. For instance, "ABC" is less than "ZX" ; "ABCD" is greater than "ABC".
Q := IN1 < IN2;
(* The comparison is executed only if EN is
Op1: LD IN1
ST Q (* Q is true if IN1 < IN2 *)
> >= <= = <> CMP