Modbus通讯协议在DCS与PLC通讯中的应用

The Application of Modbus Communication Protocol in the Communication of DCS and PLC

Modbus协议具有侦错能力强、数据传输量大、实时性好等特点,因而成为目前自控领域使用非常广泛的通讯语言。介绍了Honeywell TPS系统与Siemens PLC通过Modbus协议进行实时通讯的设计和开发,介绍了Modbus协议的特点和应用过程,对两系统硬件设置、软件组态以及调试方面作了较为详细的介绍。该系统已投入运行,稳定可靠,具有良好的应用和推广价值。

MODBUS protocol has powerful data transmutability,delectability and real time processing capability,so it had become a communication language that application widely in auto- control field at present. This article introduces the design and development of the real-time communication through MODBUS protocol between HONEYWELL TPS system and SIEMENS PLC, recommend the characteristic of MODBUS protocol and use course,it makes to be comparatively detailed introduction to hardware of two systems,software configuration and debug. This system has been run steadily and reliably,it offers valuable reference for the using and popularize.