Make interlocking with Hali Systems DCS 1.1
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A mass flow meter combined with a pneumatic control valve – this setup ensures that the valve closes in the event of a power loss. I would be very grateful if someone could provide the underlying schematic or explain the configuration process. Thank you very much! ! !
Please describe in detail: flow meter + control valve = ? FIC control loop? How to achieve shutdown of the valve in case of power loss? Power outage?
【Power-off valve closure】: Does it refer to the valve shutting down due to a power loss, or is it an electrical signal that informs you that a certain area has lost power? ①If the power to the valve is cut off and it is required that the control valve close, then when selecting the valve, it should be chosen as FC. ②If an electrical signal is used to inform the DCS that a certain area has lost power and the valve needs to be closed. Configuration is required. The idea is simple: when the conditions are met, set the control valve’s PID to manual mode, switch it to programmed control, and then set the opening degree to zero. Additionally, if the control valve is equipped with a solenoid valve for rapid shut-off, that valve can be activated, the PID setting of the control valve can be set to manual mode, programmed, and then the opening degree can be set to zero
Please find the image and the true version, thank you so much