Short, China is commonly called distributed control system generally. It is a process control level and process control levels to communication network composed of multi-level as a link computer systems, integrated computer (Computer), communication (Communication), display (CRT) and control (Control), etc. 4C technology, The basic idea is decentralized control, centralized operations, classification management, configuration flexibility, easy configuration. DCS has the following characteristics:
(1) high reliability As DCS system control functions will be decentralized to achieve in the computer, the system uses fault-tolerant design of the structure, so a computer malfunction will not cause the system Other Loss of function. In addition, all computer systems are relatively simple tasks, can be used against the need to implement the functionality with a specific structure and special computer software so that each computer system reliability is improved.
(2) open DCS adoption of open, standardized, modular, and series design, the system the way computers communicate with local area network, to achieve the information transfer, when you need to change or expand the system functions can be easily connected to the new computer system communication network or unloaded from the network, almost does not affect the system Other Computer work.
(3) flexibility Through the configuration process of application software objects according to different software and hardware configuration, that is, measurement and control signals and determine the inter-connection of the control algorithm from the library select the appropriate control law, and from the basic graphic graphics library called the composition of the required various monitoring and alarm screen, thus easy to form the necessary control systems.
(4) easy maintenance Single function, small or micro-dedicated computer, with easy maintenance, convenient features, when a local or a computer failure can not affect the operation of the system under line replacement, rapid troubleshooting.
(5) coordination Between the various stations of various data transmission through the communication network, the whole system of information sharing, coordination, in order to complete the overall control system functions and optimization.
(6) complete control Control algorithm rich set of continuous control, sequence control and batch control in one, can be realized cascade, feed forward, decoupling, adaptive and predictive control and other advanced control, and can be easily controlled by adding the required special algorithm.
DCS on the constitution is a flexible, managed by a dedicated computer stations, operator stations, engineering stations, recording station, site controller and data acquisition stations, similarly, can be a common server, industrial computer and PLC device and forms.
At the bottom level of process control are generally distributed on-site controllers, data acquisition stations, data acquisition and control locally, through the data communications network to monitor the level of production computer. Production control level on the data from the process control level centralized operations management, such as a variety of optimization calculation, statistical reporting, fault diagnosis and alarm and so on. With the development of computer technology, DCS can follow the needs of computer equipment with higher performance network connections to achieve more advanced centralized management features, such as planning and scheduling, warehouse management, energy management. I am a professional editor from Chinese Manufacturers, and my work is to promote a free online trade platform. http://www.chinaqualitycrafts.com/ contain a great deal of information about piaa h4 bulbs , headlight strobe lights welcome to visit!
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