概述随着生产发展的需要和微机技术的迅猛发展,计算机被越来越多地应用于过程控制中。过去的一个微处理机一般要控制几个甚至几十个回路,这样的控制系统危险集中,可靠性差。新一代计算机控制系统则采用分散型控制系统。分散是指控制功能来说的,即通过功能的分散来达到分散危险性、提高可靠性的目 Overview With the development of production needs and the rapid development of microcomputer technology, computers are more and more used in process control. The past, a microprocessor generally control several or even dozens of loops, such a control system is dangerous and poor reliability. A new generation of computer control system uses a decentralized control system. Dispersion refers to the control function, that is, through the dispersion of functions to achieve the risk of dispersion, improve the reliability of the head