what is dcs system

Colleagues who work in industrial control often hear about the DCS system, so what kind of system is this DCS system?

Let's first look at the literal meaning of this DCS system. Distributed Control System is referred to as DCS, Distributed distributed, so the Chinese meaning of DCS system is "distributed control system", also called distributed control system. DCS system is a system that meets the requirements of large-scale industrial production and increasingly complex process control. From the perspective of comprehensive automation, it integrates process control and process monitoring, and combines 4C technology, computer (Computer), communication (Communication), and display (CRT). ) and control (Control), a new type of control system developed.

The design concept of the DCS system is: decentralized control, centralized management, hierarchical management, flexible configuration, and convenient configuration.

Characteristics of DCS system:

● Reliability The design of DCS system will basically adopt redundant design. The meaning of redundancy is to combine the important functions of the system. The equipment, CPU and various modules are designed in a one-use and one-standby format. When a certain CPU or module fails, the backup equipment will start working immediately, or you can choose both to work at the same time, thus reducing the number of critical equipment System failure caused by a malfunction.

● The open system adopts an open platform, which is systematic, modular and standardized. Each interconnected computer system can achieve centralized interconnection and mutual access through communication methods such as Ethernet. When there is a need to increase or decrease the system, , you can directly add or delete system modules, which is more convenient for system design and maintenance.

● The modular DCS system has developed to the present and is more inclined to modular design. All core equipment has become modular design, such as CPU, power supply, I/O module, communication module, AI /AO modules, these devices are designed as independent modules. To assemble a cabinet, you only need to install the base of the module and install the corresponding module on the base to complete the hardware installation. Each module integrates its own CPU with processing functions, and the processing speed is faster. At the same time, the modules do not interfere with each other. If a problem occurs in one module, it will not affect other modules, and it supports hot swapping when powered on.

● Powerful functions

The control functions of the DCS system are already very rich, such as continuous control, cascade control, PID control, etc. The system’s powerful calculations can satisfy The above-mentioned complex control process can achieve optimal control accuracy for the production processes of various industries.

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