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一、概述分散控制系统是以微处理机为核心的分散型直接数字控制(DDC)装置,它是在计算机、自动控制、数据通讯、图象显示等技术的基础上发展起来的一种现代过程控制调节装置。所谓分散控制系统,是把整个连续的生产装置流程分散地采用一些可外控的微处理机及微型计算机的子系统进行控制,而将全部信息通过一根同轴电缆的数据通讯母线,与上位计算机连接,实现计算机分级控制和管理,使过程控制最佳化。同时采用图象显示器(CRT)进行集中显示,并通过各种键盘进行集中操作。
I. Overview Distributed control system is microprocessor-based decentralized direct digital control (DDC) device, which is in the computer, automatic control, data communications, image display and other technologies developed on the basis of a modern process Control the adjusting device. The so-called decentralized control system, is to disperse the entire continuous production process using a number of external microprocessors and microcomputers can control the subsystem, and all the information through a coaxial cable data communication bus, and the host Computer connection, to achieve computer grading control and management, so that process control is optimized. At the same time using the image display (CRT) for centralized display, and through a variety of keyboards for centralized operation.