基于VC的Modbus协议通信测试软件的实现——Modbus串口通信与Modbus/TCP通信

Implementation of Modbus Mode Communication Test Software Based on VC——Modbus Serial and Modbus/TCP Communication

实现不同种自动化设备之间的通信是系统集成的关键。Modbus是一种全开放、免费提供,非常容易理解和实施的协议,目前基于Modbus协议的串口通信是较常用的方式之一。同时,由于结合TCP/IP协议形成的Modbus/TCP协议具有侦错能力强、数据传输量大、实时性好、开放性好等特点,亦得到了广泛应用。利用MSComm控件开发了一个Modbus串口协议通信测试软件。利用Microsoft的Win-sock方法开发了一个Modbus/TCP协议通信测试软件。

How to realize communication between different kinds of automation devices is the key to system integration. Modbus protocol is a good choice since it＇s an open protocol, meaning the specification is available, free of charge for download, and it＇s simple for understanding and implementation. Nowadays, serial communication based on Modbus protocol is a common way to realize it. Modbus/TCP protocol combining TCP/IP protocol with Modbus protocol has powerful data transmittability, detectability, real time processing capability and characteristic of openness, so it has been widely used. A Modbus serial communication test software is developed based on MSComm control and a Modbus/ TCP communication test software is developed based on winsock of Microsoft.