Distributed control system referred to as DCS, or known as "decentralized control system" or "distributed computer control system". It adopts the basic design idea of decentralized control, centralized operation and management, and adopts the structure form of multi-level classification and cooperative autonomy. Its main characteristics are its centralized management and decentralized control. DCS in power, metallurgy, petrochemical and other industries have been extremely widely used.
DCS with the continuous improvement of modern large-scale industrial production automation, the production process of the system requirements gradually complex. At this time, the need for a parallel centralized control of the industrial system to sum up the overall situation, so DCS it can combine the communication network and automatic control system, improve the efficiency of industrial production. The classic DCS control system is generally composed of centralized management system, decentralized control device and communication network connection module.