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What is the SCAN time of a DCS/PLC? What is the typical
value for scan time of DCS and PLC?
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Answer Posted / sivabalan
PLC/DCS
Scan time is scan input and update input table, then perform logic and update logic table and finally update physical output devices. Taking time to execute above process is called.
Process
Scan input, Perform logic, Update output and finally perform house keeping task such as update the display.
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