基于RS-485总线多CPU控制系统简化网络模型及其通讯协议  

The Simplified Network Model and Communication Protocol of the Multi-CPU Control System Based on RS-485 Bus

作　　者：刘俊伟[1] 

机构地区：[1]陕西理工学院

出　　处：《可编程控制器与工厂自动化（PLC FA）》2007年第5期83-85,82,共4页Programmable controller & Factory Automation(PLC & FA)

摘　　要：基于RS 485总线的多CPU控制系统中各个CPU控制之间要协调工作,则网络模型和网络通讯协议是非常重要的。本文针对该种控制系统的特点,提出了适用于该系统的RS 485网络简化模型和通讯协议。在简化网络模型和通信协议基础之上编制的通信程序大大的提高了系统的通信速度和可靠性。Network model and communication protocol is important for each controller of multi-CPU control system based on RS- 485 Bus to work in harmony.Being aimed at this control system＇s characteristic, network model and communication protocol being applied to this control system are suggested in this paper.Communication program has been designed by this simplified model and communication protocol ,and it has greatly enhanced system＇s communication speed and reliability.

关 键 词：RS-485总线 网络模型 通讯协议 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]