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Safety Logic Solver Validation on Logic Updates

Posted in Safety on Tuesday, October 18th, 2016. No comments yet
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The global safety standard IEC 61511 Functional safety – Safety instrumented systems for the process industry sector describes the validation process. The objective of the requirements of this clause is to validate, through inspection and testing, that the installed and commissioned safety instrumented system and its associated safety instrumented functions achieve the requirements as stated […]

Safety Instrumented System Diagnostics to Prevent, Not Initiate Safety Trips

Posted in Abnormal Situation Prevention, Safety on Thursday, May 24th, 2012. One comment so far
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Emerson’s Mike Boudreaux pointed me to a great blog post by exida’s Principal Partner, Dr. William Goble. The post, I Don’t Want No D*** Diagnostics! describes how automatic diagnostics in a safety-rated transmitter led to a false trip, much to the displeasure of the impacted control engineer and plant staff. Dr. Goble describes the incident: […]

Technology Trends in Process Safety

Posted in Safety, Technologies on Friday, June 25th, 2010. No comments yet
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Emerson’s Mike Boudreaux shared a Control Engineering Asia article written by the renowned process safety expert, Paul Gruhn. The article, Providing Process Safety, analyzes some of the latest trends in safety instrumented systems (SIS) designs for the process industries. Mike manages the DeltaV SIS brand and highlighted many of the areas in the article where […]

Methods for Testing Safety Critical Loops

Posted in Safety on Thursday, July 23rd, 2009. No comments yet
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A big thanks to Emerson’s Mike Boudreaux for his guest post while I’m out this week. Jim is on vacation this week. He knows that I always have something to say about process safety and functional safety, and so he’s agreed to let me to fill in for him as a guest author for the […]

Views on Safety System and Control System Separation

Posted in Safety on Monday, June 1st, 2009. 2 comments so far
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Charles Fialkowski’s blog post last week, To Integrate or not to integrate Safety and Control describes some of the continued discussions going on concerning separation of the safety instrumented systems (SIS) and basic process control systems (BPCS). He wrote: Today, I still see a lot of confusion over this issue on what’s right and what […]