Modbus协议在多机系统开发中的应用  

The Application of Modbus Among the Multi-systems

作　　者：邓元生[1] 李力争[1] 

机构地区：[1]中南大学信息学院,湖南长沙410083

出　　处：《微计算机信息》2009年第14期264-265,218,共3页Control & Automation

摘　　要：本文设计了电动机保护装置的通信机制,采用Modbus报文方式进行信息传递,实现了多机系统中的信息交换,解决了主CPU模块处于黑匣子状况的问题,实现了各模块间的通信;采用CRC校验,提高了通信的准确性和可靠性,并提出了CRC校验实现的几种方法;在调试过程使用Modbus调试软件,模仿主方的通信过程,整个接收、发送过程都是透明的、清晰的,模块中的问题能得到及时的发现和解决,大大增强了不同开发人员、不同CPU之间的协调性,从而提高了装置研发的效率。This paper is designed to protect electrical devices of communication mechanisms, using Modbus message form of information transmission to achieve a multi-system of information exchange,it solved the black box status of the main CPU module and realized the communication between the various modules;adopted with the CRC checkout, it improved the accuracy and reliability of communications,and achieved several ways for the CRC checkout;in the process of debugging it used Modbus debugging software to imitate the main communication process;during the entire procession all the receiving and sending process are transparent and clear, so the problems of various Modules can be discovered easily and then resolved timely, by this means greatly strengthened the coordination between different developers and different CPU, thereby improving the efficiency of the device research.

关 键 词：MODBUS协议 多机系统 CRC校验 通信 

分 类 号：TP336[自动化与计算机技术—计算机系统结构]