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[ pdf ] Tuning PID Loops

Tuning PID Loops Download
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Topic under  Control Mode
Source: watlow.com 
File size: 23.05 KB
File type: pdf
Last download on: Mon Dec 18, 2017 07:32:53 PM
Short Desciption:
Proportional, Integral and Derivative (PID) Control The three-mode PID control is used primarily when overshoot of the PV cannot be tolerated as in the Quarter Wave Decay response of ...

Summary:
This manual method that has been used on thousands of processes and hundreds of different controllers with a very good success rate. This procedure has been developed from many years of experience and has proven to be useful for processes where autotuning and adaptive tuning may have failed or is not available.
To avoid upsetting the process when changing PID values, place the control in manual. While in manual, the PID values may be changed without upsetting the output. After changing PID values, place the loop back into auto. If a small upset of the output is not important, PID constants may be tuned while in auto.
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