Ladder Logic Comparison Instructions

 This give the definition of comparison instructions and the way they are used. In general comparison instruction are used to test a pair of values to energize or de-energize a rung.

• EQU - Equal


• NEQ - Not Equal


• LES - Less Than


• LEQ - Less Than or Equal


• GRT - Greater Than


• GEQ - Greater or Equal


• MEQ - Masked Comparison for Equal


• LIM - Limit Test