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计算机工程 ›› 2010, Vol. 36 ›› Issue (16): 226-228. doi: 10.3969/j.issn.1000-3428.2010.16.081

• 工程应用技术与实现 • 上一篇    下一篇

基于Modbus协议的工控节点设计与实现

李 伟   

  1. (重庆交通大学信息科学与工程学院,重庆 400074)
  • 出版日期:2010-08-20 发布日期:2010-08-17
  • 作者简介:李 伟(1976-),男,副教授,主研方向:智能控制,知识工程
  • 基金资助:

    重庆交通大学科研启动和骨干教师基金资助项目

Design and Implementation of Industry Control Node Based on Modbus Protocol

LI Wei   

  1. (College of Information Science & Engineering, Chongqing Jiaotong University, Chongqing 400074)
  • Online:2010-08-20 Published:2010-08-17

摘要:

针对分布式工业控制系统提高运行可靠性、减小故障率的需要,开发一种基于Modbus通信协议的嵌入式控制节点,以AT89C51作为主控制器。介绍Modbus通信、监控、显示等功能模块的硬件设计和工作机制,给出Modbus通信协议和通信流程,使监控站能够有效地通过Modbus通信接口监控设备节点的工作状态。

关键词: Modbus协议, 嵌入式, 现场总线

Abstract:

For satisfying the urgent need of enhancing the operation reliability and cutting down the malfunction rate by broadly applying lots of embedded control nodes based on the field-bus standard in the distributed control system, a kind of embedded control node according with the Modbus communication protocol is developed. In this industry node, an AT89C51 is selected to work as the main controller, the hardware design and work mechanism about some function modules are discussed, such as Modbus communication module, monitor and control module, display module etc., and the Modbus communication protocol and communication flow are given out, so that a supervisory control station can effectively monitor and control the work state of all nodes through this Modbus communication interface.

Key words: Modbus protocol, embedded, field-bus

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