Logix5000 Controllers General Instructions - SLAC Confluence

Trigonometric Instructions (SIN, COS, TAN, ASN, ASIN, ACS, ACOS, ATN, ATAN) 537FBD_MATH_ADVANCED StructureInput Parameter Data Type Description:EnableIn BOOL Enable input. If cleared, the instruction does not execute and outputs are not updated.Default is set.Source REAL Input to the math instruction.Valid = any floatOutput Parameter Data Type DescriptionEnableOut BOOL The instruction produced a valid result.Dest REAL Result of the math instruction. Arithmetic status flags are set for this output.Description:Arithmetic Status Flags:Fault Conditions:The Source must be greater than or equal to -1 and less than or equalto 1. The resulting value in the Destination is always greater than orequal to 0 or less than or equal to π (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 calculates the arc cosine of the Source and places the result inthe Destination.The rung-condition-out is set to true.The rung-condition-out is set to false.Function BlockCondition:prescaninstruction first scaninstruction first runActionNo action taken.No action taken.No action taken.Publication 1756-RM003I-EN-P - January 2007