基于Modbus协议的串行通信的应用

摘要

针对目前工控领域,现场数据采集分散管理的不足,该文采用了Modbus RTU通信协议和串口通信技术,设计了主从式通信的采集系统,实现对各个现场的远程集中监控,即集散控制系统.详细阐述了在C#环境下基于Modbus RTU通信协议的上住机和DAM-3504系列三相多功能电量采集模块经过GPRS网络的主从式串行通信的实现.经过现场测试验证,表明该方案运行稳定,操作简便,能够对采集的数据进行实时显示,解决了对现场的统一监控和分布式管理的问题,为工业控制现场提供了一套可行性方案.%Lacking of decentralized management of the field data collection, for industrial control field, the paper using the Modbus RTU communication protocol and serial communication technology, designed a collection system of master-slave communication,and realized remote centralized monitoring of each scene, that is distributed control system.lt Elaborated the realization of master-slave communication based on Modbus RTU communication protocol between host computer and the DAM-3504 series three-phase multifunction power collection modules in the C # environment through the GPRS network. After field testing and validation,with the stable operation of the program, easy to operate, real-time displaying of the data collected, solved the problem of unified on-site monitoring and distributed management, it provides a feasible plan for the industrial control field.