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Logix5000 Controllers General Instructions - SLAC Confluence

Logix5000 Controllers General Instructions - SLAC Confluence

Logix5000 Controllers General Instructions - SLAC Confluence

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208 Compare <strong>Instructions</strong> (CMP, EQU, GEQ, GRT, LEQ, LES, LIM, MEQ, NEQ)Execution:Conditionprescanrung-condition-in is falserung-condition-in is trueRelay Ladder ActionThe rung-condition-out is set to false.The rung-condition-out is set to false.evaluate expressionexpression is truerung-condition-out is setto trueexpression is falserung-condition-out is setto falseendpostscanThe rung-condition-out is set to false.Examples:If the CMP instruction finds the expression true, therung-condition-out is set to true.If you enter an expression without a comparison operator, such asvalue_1 + value_2, or value_1, the instruction evaluates theexpression as:If The Expressionnon zerozeroThe Rung-condition-out Is Set TotruefalsePublication 1756-RM003I-EN-P - January 2007

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