Plant monitoring and control system

Abstract

A plant monitoring and control system is specialized in a plant such as a reactor power plant, which is provided with plural process systems functionally divided, and is communicable between the process systems with broadcast communication. Detection signals corresponding to process variables of the process systems, detected by the detectors, are supplied into the transmission line by the remote process input-output unit. Command signals can be also supplied into the line via an input unit and a console controller of a corresponding operator console. A corresponding process controller takes in the detection signals and command signals from the line, and returns calculated control signals into the line. The remote process input-output unit, controls, the corresponding process device by outputting the control signals to the process device. Each of the process controllers incorporates a control backup element against control failure of other process controllers, and eliminating the need for a multiplex construction of the process controller for a redundant system. The console controller controls images on a display unit in the corresponding operator console. A display backup element can also be incorporated in the console controllers respectively, in order to simplify the console construction.