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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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500 Special <strong>Instructions</strong> (FBC, DDT, DTR, PID)Operand Type Format DescriptionSetpointProcessvariableOutput %displays current value of the setpointdisplays current value of the scaled Process Variabledisplays current output percentage valuePID(PID,ProcessVariable,Tieback,ControlVariable,PIDMasterLoop,InholdBit,InHoldValue);Structured TextThe operands are the same as those for the relay ladderPID instruction. However, you specify the Setpoint, Process Variable,and Output % by accessing the .SP, .PV.and .OUT members of the PIDstructure, rather than by including values in the operand list.Publication 1756-RM003I-EN-P - January 2007

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