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七十年代以来,由于微处理机的出现,国外出现了总体分散控制系统,或称微处理机集中分散型综合控制系统(简称集-散系统)。它具有控制功能分散,显示、操作功能集中等优点。作为成套仪表,它把计算机控制、模拟仪表控制、顺序控制三者结合起来,适用于冶金、石油、化工、电站、轻工等各种工业部门,也可以用于数据处理系统,使应用扩大到科学试验自动化,城市设施现代化等方面。 本文重点介绍日本日立公司Unitrol ∑系列。 一、集-散系统的发展背景 任何一个调节回路按功能可划分为检测、调节、执行三部分,其中调节部分包括
Since the 1970s, due to the advent of microprocessors, an overall decentralized control system has emerged in foreign countries, or a microprocessor-based decentralized integrated control system (referred to as a set-discrete system). It has decentralized control functions, display, operating functions and other advantages. As a complete set of instruments, it combines computer control, analog meter control, sequential control of the three together for metallurgy, petroleum, chemical, power plants, light industry and other industrial sectors, can also be used for data processing systems, the application expanded to Scientific experiment automation, urban facilities modernization and so on. This article focuses on Japan Hitachi Unitrol Σ series. First, the set - scattered system development background Any one of the control loop can be divided into functional testing, regulation, the implementation of three parts, including the regulation part includes