6/25/2008 4:38 PM | |
Joined: 9/27/2006 Last visit: 9/25/2024 Posts: 12283 Rating: (2685) |
Hello asecawy; Tuning the loop (finding the parameters that give you the control response you need in your process) is the most discussed item in control circles. There are mathematical solutions (see controlguru.com,I am addicted to ther site), try-and-test empirical techniques, just-let-the-next-guy-worry-about-it techniques.... If you would like to see some very good, technical, but non-mathematical explanations of the exact impact each gain parameter has on your process response, I suggest you look at the following training pages by a gentleman named Ron Beaufort: http://www.ronbeaufort.com/sample_lessons.htm Luckily for you, FB58 has an auto-tune that will help you determine whatvalues of your P,I and D gains will give you the responseyou need. 3 Controller Tuning in FB 58 "TCONT_CP"3.1 IntroductionThe controller optimization is to be used exclusively for heating or cooling processes.With controller tuning in FB 58 "TCONT_CP", the PI/PID controller parameters are set automatically. There are two ways of tuning: -Tuning by approaching the operating point with a setpoint step change -Tuning at the operating point by setting a start bitIn both cases, the process is excited by a selectable manipulated variable step change. After detecting a point of inflection, the PI/PID controller parameters are available and the controller switches to automatic mode and continues to control with these parameters. You can also tune your controller using the wizard in the parameter assignmentuser interface. Read more in the manual "PID temperature control": http://support.automation.siemens.com/WW/view/en/18652438 |
Last edited by: dchartier at: 6/25/2008 4:40 PM |
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7/29/2008 7:09 AM | |
Posts: 12 Rating: (0) |
Dear wizard, I have tried FC 106. and it works properly . thank you very much asecawy |
5/18/2015 9:24 PM | |
Posts: 1 Rating: (0) |
can anyone fix the problem of LMN out always zero instead of value other than zero???
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