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Download 2080-UM005A-EN-E Micro820 Programmable Controllers User
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Appendix D IPID Function Block This function block diagram shows the arguments in the IPIDCONTROLLER function block. IPIDCONTROLLER ENO EN Process Output SetPoint AbsoluteError FeedBack ATWarning OutGains Auto Initialize Gains AutoTune ATParameters The following table explains the arguments used in this function block. IPIDCONTROLLER Arguments Parameter Parameter Type Data Type Description EN Input BOOL Function block enable When EN = TRUE, execute function. When EN = FALSE, do not execute function. Only applicable to LD, EN is not required in FBD programming. Process Input REAL Process value, measured from the output of controlled process. SetPoint Input REAL Set point value for desired process Feedback Input REAL Feedback signal, measured from control input to a process. Auto Input BOOL Operating modes of PID controller: • TRUE —controller runs in normal mode • FALSE — controller out value equals to feedback value Initialize Input BOOL A change in value (True to False or FALSE to TRUE) causes the controller to eliminate any proportional gain during that cycle. It Also initializes AutoTune sequences. Gains Input GAIN_PID Gains for IPIDCONTROLLER See GAIN_PID Data type Rockwell Automation Publication 2080-UM005A-EN-E - December 2013 135
