OPT FOR SECURITY AND PERFORMANCE
Improve the security and performance of your plant with alarm management, performance supervision, asset supervision, web-based data visualisation, optimisation, advanced control, and tuning with the new TaiJi tool.
Rethink your working methods and obtain immediate results thanks to our services, trainings, and consulting expertise. Manage changes intelligently with our proven solutions.
certified service providerNovember 2005
In this issue
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Classes and seminars |
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About us |
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Trick of the month |
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To contact us |
See our previous issues :
http://www.topcontrol.com/techinfo/news.php
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Classes & seminars
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Detailed Loop Analysis with ExperTune
November 30 - December 2, 2005 - Clearwater Beach FL |
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About us
See our new calendar for 2006
See at : http://www.topcontrol.com/training/tcalendar.php
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We offer a new 1-day class LT-110-1 PID Loop Tuning and
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Article
« Using Performance Monitoring and Optimization Tools for a Paper Machine Start-Up » by Jean-Guy Lagacé (Kruger Wayagamack) , Serge Naud (Top Control) and Michel Ruel (Top Control) will be published in « Pulp and Paper Canada » December 2005 issue.
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Trick of the month : Variable speed drive? (2 of 2)
When a variable speed drive is used as a final control element, it is essential to verify its configuration (see October 2005 Top News). Configuring properly the parameters in the variable speed drive is important, however, tuning the loop will require some precaution. The response could be non linear, for example at low speed the process gain is higher hence, at low speed, the flow increases more when the speed is increased. Also, the response for a small change and a large change is different (for a large change acceleration/deceleration limit is reached). Finally, the response when increasing speed and when decreasing speed could be different.
To analyze this loop, it is essential to test:
- at low and high flow,
- when increasing and decreasing controller output,
- with small and large changes.
If we use PIDTuner from ExperTune, these tests can be done in automatic or manual mode; also, tuning parameters ensuring stability in all cases will be determined by the program. If linearization or special programming is necessary, right choices will be done using PIDTuner special tools.
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To contact us
Comments, suggestions and requests are welcomed. Please e-mail us at: info@topcontrol.com
You are welcomed to visit our web site :http://www.topcontrol.com
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49 Bel-Air Street, Lévis, QC
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1020 James Drive, Suite A
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