Archive of SCADA - MAVERICK Ideas

Plug-And-Play Doesn’t Happen By Luck

Posted by Mike Robb on March 12, 2013 @ 10:10 am

Have you ever worked on a project where several pieces of equipment from different manufacturers were purchased with the expectation that the equipment would just plug together and work? On small-scale items, that might be real possibility, but on a larger scale, such as an entire plant or a retrofit of a plant, assuming that everything will simply work can create serious problems. Success must be engineered. Once the mechanical issues are ironed out, there are multiple things to consider from a controls perspective, such as system integration for the different systems, control philosophy, and communication protocols, among other items. For communication, most new platforms support multiple protocols so this is not as much of a problem. However, on the older platforms typically involved in retrofits, communication options are more limited, and either a universal communication protocol...

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MOC for Plant Control Systems

Posted by Jason Montroy on May 30, 2012 @ 7:52 am

Management of change (MOC) can apply to nearly anything from organizations to projects to IT infrastructure. But does it apply to plant control systems? Considering that control systems need to change over time - process optimization drives changes in control logic and software updates occur on at least a monthly basis – the answer is: MOC is essential for plant control systems. You will make at least a handful of changes to your control systems on a monthly basis. It pays to approach these changes in a consistent manner. After all, if your SCADA system fails, your operators find themselves flying blind, without a means to control the system. If your PLC or DCS fails, plant production will come to a screeching halt. Most plants have some form of MOC process. But not every plant’s process is well-reasoned and documented – or effective. Processes range from simply “asking Joe...

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