This document provides an example of a description of the control algorithm. The document was developed for the purpose of a clear and understandable presentation of the material for both the technologist and the programmer of the middle and upper level of this system. Separately, the vertical lines show where the signals come and go, the signals associated with the upper level are graphically described. In the middle of the document, the control algorithm itself is drawn, demonstrating the basic connections and actions of the mode switches.
In this example of describing the control algorithm, two systems were combined.
Distributed process control system (DCS) and emergency protection system (ESD)
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