Schematic representation of solenoid valve control in PID
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In the PID diagram, the pump starts up, the solenoid valve also starts up; after 10 minutes the valve remains open, after which the solenoid valve shuts off. The pump runs continuously. 10 minutes before shutting down the system, the solenoid valve opens; 10 minutes later, the pump shuts off and the solenoid valve closes. May I ask: how to represent it graphically? Thank you very much! ! ! !
We discuss delay switches only during DCS configuration; there may be no specific requirements or instructions in the design, and they are ultimately specified in the operating procedures.