PID controller and data collecting method
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United States of America Patent
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Feb 20, 2018
Grant Date -
Jan 7, 2016
app pub date -
Jun 30, 2015
filing date -
Jul 1, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A PID controller includes: a manipulated variable calculating portion that calculates a manipulated variable MV based on a set point SP and a process variable PV through a PID control calculation; a manipulated variable outputting portion that outputs a manipulated variable MV to outside of the controller; an alarm notifying portion that generates an alarm when a problem has been detected; a data recording portion that temporarily records time series data for the process variable PV; and a data storing portion that reads out and storing data recorded by the data recording portion 15 before and after the alarm event.
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