Distributed control system (DCS) for interlocking control valves

Distributed control system of the present invention provides for interlocking control valve includes a controller (1), the controller (1) for interlocking with a plurality of control valves (3) are connected to the controller (1) can work in a conventional mode and the emergency mode, the valve opening when operating in the normal mode, the controller (1) starts from an initial value of the opening control valve opening to the interlock predetermined value or input from the control valve (3) when the work in the emergency mode, the controller (1) stops the control valve opening interlocking control valve (3), and the value of valve opening return to the initial value of the opening degree of the normal mode. The present invention provides a simple process for the distributed control system interlock control valve interlock after reset, the control valve will not interlock valve opening scene where a sudden jump to the valve opening degree before the accident, the control can effectively prevent the occurrence of secondary interlock, greatly reducing the risk of production safety device.