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Stan Shebs (talk | contribs) heads and links |
Remove blatant advertisement and not-really-related wiki links. There are dozens of PLS manufacturers, and AB is not even the best one, so yank it. (it is the most common in the US, but not in Europe) |
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A simple system may use buttons and lights to interact with the user. Text displays are available as well as graphical touch screens. Some PLCs may only communicate over a network to some other system, such as a computer running a web browser.
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