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How to implement override control on a DCS

2016-10-07View Original

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Regulator A has: A automatic, M manual, C cascade. Regulator B has: A automatic, M manual, C cascade. Selector Y has: A automatic, M manual. Regulator A provides the normal output; when overshoot occurs, Regulator B takes over to provide the output. May I ask how to enable automatic mode for this override control, what is the sequence for switching to automatic mode, how are the set values for the selector determined, and what is the basis for those determinations?

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