Logix5000 Controllers General Instructions - SLAC Confluence

Compare Instructions (CMP, EQU, GEQ, GRT, LEQ, LES, LIM, MEQ, NEQ) 233Function BlockOperand Type Format DescriptionLIM tag FBD_LIMIT structure LIM structureFBD_LIMIT StructureInput Parameter Data Type DescriptionEnableIn BOOL If cleared, the instruction does not execute and outputs are not updated.Default is set.LowLimit REAL Value of lower limit.Valid = any floatTest REAL Value to test against limits.If set, the instruction executes as described under Execution.Valid = any floatOutput Parameter Data Type DescriptionEnableOut BOOL The instruction produced a valid result.Dest BOOL Result of the instruction. This is equivalent to rung-condition-out for the relay ladderLIM instruction.HighLimit REAL Value of upper limit.Valid = any floatDescription:The LIM instruction tests whether the Test value is within the range ofthe Low Limit to the High Limit.If Low Limit And Test Value Is The Rung-condition-out Is≤ High Limit equal to or between limits truenot equal to or outside limits false≥ High Limit equal to or outside limits truenot equal to or inside limits falsePublication 1756-RM003I-EN-P - January 2007