IS200SDIIH1A
IS200SDIIH1A
IS200SDIIH1A
controller, so it overcomes the defects of low accuracy of analog signal in the analog instrument control system, and improves the anti-interference ability of the system. The advantage of the centralized digital control system is that it is easy to calculate and judge the control according to the global situation, and the choice of the control mode and the control machine can be unified scheduling and arrangement. The shortage is that the controller itself is very demanding, must have enough processing power and extremely high reliability, when the system task increases, the efficiency and reliability of the controller will decline sharply.
3. Distributed control system (DCS) : Distributed control system (DCS) dominated in the 1980s and 1990s. Its core idea is centralized management, decentralized control, that is, management and control are separated, the upper computer is used for centralized monitoring management function, a number of lower computer decentralized to the site to achieve distributed control, the upper and lower computer with
control network interconnection to achieve information transfer between each other. Therefore, this distributed control system architecture can overcome the defects of centralized digital contro
