一种基于485标准总线的工业控制系统架构

摘要

在工程应用领域，由于485标准总线硬件设计简单，控制方便，成本低廉而得到广泛应用，但也存在一些不足。针对传统485标准总线结构的缺陷，提出了新的通用型系统总线结构。这种结构从控制设备来分由主控设备、分控设备、从设备组成，特别提出了双CPU ＋信息交换池技术，重点解决工程应用中普遍存在的由于任务多、设备分布广、通讯距离远等带来的各种困难，使传统485标准总线的功能得到大大增强，基本上满足相对复杂条件下的使用。%Becauseofitssimpledesignofhardware,convenientcontrolandlowcost,the485 standard bus has been widely used in engineering applications.But for solving some defects,a new general system bus architecture,composed of master control equipment,sub -control equipment and slave unit,is put forward in this paper.A technology of dual -CPU with information buffer pool is specially present to solve all kinds of difficulties in the engineering applications such as large number of tasks,wide equipment distribution,long communication distance,etc..It greatly enhances the functions of traditional 485 standard bus and meets the requirements of use in relative complex conditions.