基于.NET的上位机与PLC以太网通信的实现

Realization of Communication between PLC and Supervision Computer through Ethernet Based on.NET

监控组态软件的开发,首先需要解决和底层控制设备的通信问题,才能实现对工业现场数据的实时采集和控制。在Visual Studio2005运行环境下,运用.NET技术,实现了上位机监控组态软件与S7-300 PLC之间的以太网TCP通信。在实验室Festo水箱液位监控实验中,通过以太网通信方式,监控组态软件可以监控S7-300 PLC采集的液位和阀门数据,证明了本软件系统能够实时采集和控制工业现场设备数据。

With the development of monitoring and configuration software,the communication problem must be solved.Monitoring and configuration software can acquire and manage industrial data.Under Visual Studio2005,the network TCP communication between monitoring and configuration software and SIMATIC S7-300 PLC is realized by using NET technology.On the monitoring experiment of the Festo water tank's liquid level,monitoring and configuration software can monitor industrial data acquired through S7-300 PLC.It is proved that this software system is able to acquire and manage real-time industry field data.