Selecting A Control System

Posted by Art Howell on July 31, 2012 @ 11:25 am

As process control engineers, we are constantly faced with having to choose a type of control system that is a best fit for the application. If you’re an end user, you probably will not need to make this kind of selection as often as we do, so you might not keep up-to-date with the latest technologies. There are many types and manufacturers out there to choose from, and careful consideration must be taken when deciding what type of system to implement into an automatic control application, especially since these systems will often remain in place for many years. A bad decision could haunt you for a long time. There has been much discussion through the years on this topic; ... Continue Reading

Continue ReadingLeave a Comment
VN:F [1.9.22_1171]
Tags:

How to Define Manufacturing Traceability – Part 2

Posted by John Clemons on July 27, 2012 @ 9:18 am

In the last post, I talked about manufacturing traceability and supply chain traceability and hopefully made the case that they’re some big differences between the two.  And, even if I didn’t convince you, I hope I at least convinced you to think about it some more and think about what manufacturing traceability really means.  So, it’s time to get into it a little more. Most people that have thought about manufacturing traceability for awhile understand that one of the most fundamental aspects of manufacturing is the production and consumption of materials.  That’s really what manufacturing is all about. You take a bunch of materials and you combine them, or do whateve... Continue Reading

Continue ReadingLeave a Comment
VN:F [1.9.22_1171]
Tags:

Recap: Round-The-Clock Service Assists with Routine and Incident Related Activities

Posted by Paul Galeski on July 26, 2012 @ 9:12 am

No one else in the industry is offering anything like PlantFloor24—the world’s first full-service, platform-independent, 24/7 hardware, software and process support solution. It keeps manufacturing operations online and continuously improving for the long term.CEO/Founder Paul Galeski discusses PlantFloor24 at the grand opening on Tuesday, July 17. Gary Mintchell, Automation World editor in chief, said it best: “Technology suppliers have robust service solutions for their own products, but sometimes the finger-pointing about whose syst... Continue Reading

Continue ReadingLeave a Comment
VN:F [1.9.22_1171]
Tags:

Programming For The Future

Posted by Stephen Carson on July 25, 2012 @ 8:18 am

Have you ever gone online with a PLC and realized it contained no structure, the I/O was all over the place, and there were no comments in the logic? Fortunately, all projects are not retrofits or adding code to an existing PLC program. Sometimes you get to start from scratch. There are some good practices to follow when launching a new project that will help simplify a complicated program and make it easier to follow should someone else need to edit the code in the future. There is a difference between a program that merely works and one... Continue Reading

Continue ReadingLeave a Comment
VN:F [1.9.22_1171]
Tags:

Tricks Of The Trade: Level Control

Posted by Jim Ford on July 23, 2012 @ 2:44 pm

I often say, “Levels are devils to control.” Why? They’re integrating variables; that is, if the level in a vessel is constant, and the valve is opened or closed and then brought back to its original opening, the level will be at a different place in the vessel. Levels are non-self-regulating – they represent an imbalance between the flow of material into and out of a vessel. The tuning challenge is to find the best combination of gain (or proportional band) and integral time (or reset) that attempts to react to material flow imbalances and maintain the level reasonably close to a set... Continue Reading

Continue ReadingLeave a Comment
VN:F [1.9.22_1171]
Tags: