What does Dcs mean?

DCS is a "distributed control system", while PLC (programmable controller) is just a control "device", which is the difference between "system" and "device". The system can realize the function and coordination of any equipment, and the PLC equipment only realizes the function of this unit.

In terms of network, DCS network is the central nerve of the whole system. It is a safe and reliable double redundant high-speed communication network, and the system has good expansibility and openness. Because PLC basically works for individuals, when it communicates with other PLCs or upper computers, the network form adopted is basically a single network structure, and the network protocol is often inconsistent with international standards.

In terms of network security, PLC does not have good protection measures, so we adopt dual redundancy of power supply, CPU and network.

Hardware architecture

Looking at the hierarchical structure of DCS, DCS level and control management level are the two most basic links of DCS. The process control stage realizes decentralized control functions such as signal input, transformation, operation and output. In different DCS, the control equipment of process control level is different, such as process control unit, field control station and process interface unit. , but their structural forms are basically the same, and they can be collectively referred to as field control unit FCU.

Baidu Encyclopedia-Distributed Control System