Creative Teamwork

Aug 26, 2015 11:02:42 AM | Posted by MayAnn Stroup

In order for the whole project to be successful, each part of the project must be successful, and all the parts must work together. In that way, there really is only one team.

Last night I dreamed about St. Isidore of Seville.  In my dream he explained, “I’m here to give you a look at the afterlife.”  I replied, “I’m glad to meet you, St. Isidore. You’re a good choice of guide for someone in process automation!”  He laughed and said, “True, but I almost couldn’t make it, there’s a bad computer virus going around.” 

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Safety instrumented systems: Tips from the trenches: Part II

Aug 5, 2015 11:08:20 AM | Posted by Jay Griffin

The two-part installment introduces safety instrumented systems (SIS) and outlines specific tips on designing, developing, and verifying SIS applications.

Part one of this article outlined the purpose and application of the safety instrumentedsystem (SIS) as well as specific nuances with the safety integrity layer (SIL) calculations and general tips to consider when designing, developing and verifying a safety instrumented system. Keep in mind that the SIS is used for safety, not basic control. While the basic process control system (BPCS) is the workhorse of automation, the SIS is the last line of defense for the process and intended as a critical shutdown system. This second and final installment of the article wraps up by exploring tips for SIS hardware and the control system interface.

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Safety instrumented systems: Tips from the trenches: Part I

Jul 30, 2015 9:25:25 AM | Posted by Jay Griffin

The two-part installment introduces safety instrumented systems (SIS) and outlines specific tips on designing, developing, and verifying SIS applications.

Today’s article focuses on the purpose and application of the SIS as well as safety integrity layer (SIL) calculations. The second installment will finish up with exploring tips for SIS hardwarde and the control system interface. 

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Legacy Software Blues

Jul 21, 2015 3:57:00 PM | Posted by Tim Gentry

Is Your Customer’s Legacy Software Platform Holding Them Back? Virtualization Can Offer Them a Safe and Affordable Path Forward.

When integrators do a really good job, sometimes we give our clients a false sense of permanence. The rock solid system you set them up with performs flawlessly. So well, in fact, that they never have to think about it, much less considered upgrading. Why would they when their current system works, operators are familiar with it and, most importantly, it’s paid for?   

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Timekeeping protocols for control systems: What time is it?

Jul 9, 2015 10:20:57 AM | Posted by Robert Henderson

Do we care what time it is?

Do you have a control system that only uses buttons and lights to interact with operators?  Is it missing real-time trending, alarm historian and regulatory reporting?  There are certainly control systems that don't have a need for accurate clocks, but they are few and far between.  Let us assume you do not have one of those systems and keeping time is vital to your operations.

It is always good to have accurate time, but it is more important to have synchronized time.  If every clock in the building is 10 minutes slow, then you can still tell which of two events happened first. You're going to have a big problem on your hands if your DCS has one time, your database server has another, a PLC has a third, and they all drift independently. Sequence of Events (SOE) operations, time stamped I/O and alarming, and synchronized motion are all applications that mandate synchronized clocks.

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Do I really need this alarm?

Jun 30, 2015 4:55:59 PM | Posted by Mike Robb

A common occurrence is an alarm being driven by code that is no longer being utilized. A periodic review of alarm philosophy should be conducted by third-party or plant maintenance employees.

Have you ever reviewed the list of standing alarms in your plant?  Do you see alarms that always seem to be cycling?  Are there multiple alarms that have indicated an alarm state for an extended period of time? Have operators silenced or disabled the alarms that are constantly going off? I have found numerous power plants that have forced off or silenced alarms due to the repeated activation just so they can put more focus on the 300 other active alarms during normal plant operations.  A review of the standing alarms often leaves you wondering which alarms the operator notices when overwhelmed with so many. So how do you make sure you have the right alarms in place?

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How Information Provides Insights and Changes Behaviors

Jun 25, 2015 12:43:00 PM | Posted by John Boyd

The challenge of gathering historical and real-time data is to provide that data back to the user in a way that provides insights. This can be accomplished by providing thought-out dashboards and reports to key operational personnel and managers.

We tend to put a lot of effort into gathering historical and real-time data in the industrial process environment. The challenge is to provide that data back to the user in a way that provides useful performance data. This can be accomplished by providing thoroughly thought-out dashboards and reports to key operational personnel and managers. It is amazing what behaviors that can be changed in a processing environment if everyone is given the right information.

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To alarm or not to alarm?

Jun 17, 2015 2:21:00 AM | Posted by Jeff Wood

Alarm rationalization is a step that should be taken to avoid the generation of unnecessary alarms. Otherwise the alarm may end up of the alarm list and stay there for a while.

To alarm or not to alarm? That is the question. There are many control room alarm screens with alarms that are hours, days, and sometimes weeks old. Why did these alarms show up on the screens if they were not important enough to address at the time they occurred? Was the operator in a hurry to acknowledge the alarm to stop the horn? Are there so many alarms that come in that the operator is overwhelmed by the number of alarms that come in. Are there multiple alarms for the same signal or occurrence? Is the alarm just not that important?

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