Logix5000 Controllers General Instructions - SLAC Confluence

560 Math Conversion Instructions (DEG, RAD, TOD, FRD, TRN, TRUNC)FBD_MATH_ADVANCED StructureInput Parameter Data Type DescriptionEnableIn BOOL Enable input. If cleared, the instruction does not execute and outputs are not updated.Default is set.Source REAL Input to the conversion instruction.Valid = any floatOutput Parameter Data Type DescriptionEnableOut BOOL The instruction produced a valid result.Dest REAL Result of the conversion instruction. Arithmetic status flags are set for this output.Description:Arithmetic Status Flags:Fault Conditions:The RAD instruction uses this algorithm:Source*π/180 (where π = 3.141593)Arithmetic status flags are affected.noneExecution:Relay LadderConditionprescanrung-condition-in is falserung-condition-in is truepostscanActionThe rung-condition-out is set to false.The rung-condition-out is set to false.The controller converts the Source to radians and places the result in the Destination.The rung-condition-out is set to true.The rung-condition-out is set to false.Function BlockConditionprescaninstruction first scaninstruction first runEnableIn is clearedEnableIn is setpostscanActionNo action taken.No action taken.No action taken.EnableOut is cleared.The instruction executes.EnableOut is set.No action taken.Publication 1756-RM003I-EN-P - January 2007