It could be a visual object on the screen that shows (or mimics, imitates, conceptually represents) something.
«Mimic» seems to be the SCADA-specific term.

Examples.
* «The operator can switch the pump off from the mimic by a mouse click or screen touch.»
* «Typical SCADA mimic shown as an animation.»
http://en.wikipedia.org/wiki/SCADA



«Mimic» as a noun appears in other software makers' documentation as well:
* «Use this window to display a mimic of the printer which shows the current status of feeder trays and stacker bins, as well as the current report cluster name(s).» (Xerox)
http://download.support.xerox.com/pub/docs/DocuPrint_180/use...

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Note added at 1 hr (2020-06-29 08:42:27 GMT)
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A definition and more examples (from «ICT Framework Solutions Teacher Support Pack Year 8, Volume 8», by Stephen Doyle).
* «What is a mimic? A mimic shows a diagram representing the system you are controlling. You can run your control program to see if it works correctly. The mimic is a simulation.»
* «How do I select a mimic»
* «A list of all the mimics available will be shown.»
https://books.google.com/books?id=TtEN1SEjsuAC&pg=PT179&lpg=...

tiesiog kaip visose programose, tik jį dažniau verčia rodinys