Posts Tagged ‘loop variability’

Looking Beyond PID Tuning Parameters for Control Performance Issues

Posted in Process Optimization, Variability Management on Tuesday, September 19th, 2017. No comments yet
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When a variability problem emerges in a production process, the first suspect is often to look at the tuning of PID [proportional-integral-derivative] loops. While adjustments can be easily made in most automation systems, this is often not the source of the problem. In an ISA Intech article, Know when to look outside the PID tuning, […]

Process Control Loop Performance Guidance

Posted in Process Optimization, Variability Management on Wednesday, March 2nd, 2016. No comments yet
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Variability in a process can impact unplanned downtime frequency, product quality, energy usage and more. I received some questions about measures of control performance from a reliability specialist in a refinery. I thought that these questions and answers I received were too valuable to remain buried in email. The questions were: How many controllers or […]