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Archive for the ‘Variability Management’ Category

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 […]

Solving Pressure Control Loop Problems

Posted in Emerson Exchange, Variability Management on Monday, October 19th, 2015. 2 comments so far
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It was great having the weekend to rest and recover from a breathless pace at last week’s Emerson Exchange conference. There were so many workshops to see, but with more than 350 from which to choose, I couldn’t make them all. Over the next several weeks, I’ll recap some of the ones I missed. Let’s […]

Solving Reactor Temperature Control Challenges

Posted in Life Sciences, Process Optimization, Variability Management on Monday, September 28th, 2015. No comments yet
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Some of my favorite posts are ones that come out of a string of problem-solving email messages. And so it is with today’s post. Emerson’s Mark Coughran was recently at biopharmaceutical facility that was having temperature control issues on a reactor vessel. The temperature process variable was overshooting far past the setpoint with the control […]

Is Loop Tuning an Art or Science?

Posted in Support Services, Variability Management on Tuesday, February 17th, 2015. 2 comments so far
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This interesting question was posed in the LinkedIn Process Control group. You’ll need to join this 31,000+ member group to see it, but the exact question was: Process Control Tuning – is not just science but an art. The real talent to be process control engineer lies in the fact how deep he understands the […]