12.07.2015 Views

Logix5000 Controllers General Instructions - SLAC Confluence

Logix5000 Controllers General Instructions - SLAC Confluence

Logix5000 Controllers General Instructions - SLAC Confluence

SHOW MORE
SHOW LESS
  • No tags were found...

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

520 Special <strong>Instructions</strong> (FBC, DDT, DTR, PID)PID TheoryThe following figures show the process flow for a PID instructions.PID ProcessSPDisplayedas EUsErrorDisplayedas EUsSPAutoManualPVTNoYesSoftware A/MorA/M Station Mode+ --1Converts Binary toEngineering Units(PV-mini)(maxs-mins)maxi-mini+ minsSP-PVControlActionPV-SP(Error)Converts Unitsto %Error X 100maxs-minsPVDisplayedas EUsPIDCalculation(Out%)OutputBias %Software A/MMode+SetOutput %Converts Tieback Unitsto %tieback-mintiex 100maxtie-mintieAutoManualAutoManualA/M StationModeOutputLimitingOutput (CV)Displayed as %of EU ScaleSetOutput %Convert % to CV UnitsCV%(maxcv-mincv)100+ mincvCVPVPID Process With Master/slave LoopsMasterLoopSPSoftware A/MorA/M Station ModeAutoManualPVTNo+ --1SP-PVYesConverts Binary toEngineering Units(PV-mini)(maxs-mins)+ minsmaxi-miniControlActionPV-SP(Error)SPPVConverts Unitsto %Error X 100maxs-minsPIDCalculationSetOutput %Converts Unitsto %Error X 100maxs-mins(Out%)OutputBias %Software A/MModeAuto+AutoSoftwareA/M ModeManualManualAutoManualManualA/M StationModeOutputLimitingSetOutput %(Master.Out)Items referenced in this box areparameters, units, and modes as theypertain to the designated Slave loop.SlaveLoop(Master.Out)PVConverts % to (SP)Engineering UnitsX (maxs-mins)+ mins100+ --1PV-SPConverts Binary toEngineering Units(PV-mini)(maxs-mins)+ minsmaxi-miniPVControlActionSP-PVConverts Unitsto %Error X 100maxs-minsPIDCalculationSetOutput %Converts Tieback Unitsto %tieback-mintiex 100maxtie-mintieOutputBias %Software A/MModeAuto+AutoManualManualA/M StationModeOutputLimitingSetOutput %Convert % to CV UnitsCV%(maxcv-mincv)100+ mincvPublication 1756-RM003I-EN-P - January 2007

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!