摘要
Modbus通讯协议是Modicon公司（现为施耐德电气旗下的一个品牌）在1979年首次发布的一种数据传输协议，现已广泛应用于工业控制领域，并已成为一种通用的通讯标准。本文介绍了在西门子S7—200PLC系统中，如何应用Modbus通讯协议实现PLCCPU与变频器之间的数据通讯，并已在生产实践中验证了该通讯协议的可靠性与稳定性。
Modbus communication protocol is a data transmission protocol, which was first released in 1979 by Modicon Company （a main brand of Schneider electric at present）. Nowadays it has been widely used in industrial control field and furthermore has become a commonly used communication standard. This paper introduces that how to use Modbus communication protocol to realize the data communication between the PLC CPU and the frequency converter in Siemens S7-200 PLC system. The reliability and stability of the communication protocol has been verified in the production practice.
出处
《自动化信息》
2013年第4期53-55,68,共4页
Automation Information
