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Some years ago the name MMI (Man Machine Interface) was in common use. That was changed to HMI (Human Machine Interface) when the females of our species were also using it. Scada (Supervisory Control And Data Acquisition) is an advanced HMI or combination of HMI’s. Storage of data, statistical process control and many other things can be done with the big amount of Scada software available. |
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In my opinion the name DCS (Distributed Control System) is not always used correctly. Main control rooms have often a combination of HMI’s and Scada systems, which are hooked up to all the processes. If the control systems are distributed, then we can say DCS. The abbreviation DCS finds its origin at IBM, and meant Digital Control System in the early days.
If you move the letters IBM one position to the left in the alphabet, then you get HAL. Who wants to control the process with a HAL9000 computer? |
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I have been working with several Scada systems. The UNIX based systems are a lot more reliable then Scada software running on a Microsoft operating system. Setting up a Scada system has became a lot easier trough the years. From the Scada systems running under Microsoft I say: If you know one, you know them all. For building screens on a TDC3000, I still need the manuals, which I received during training. During the last 10 years I have been working with: Cimplicity Interactive Unix, Fix Intellution, Citect, Wonderware Intouch and some specific software for Xycom Terminals like Softscreen. |
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