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介绍了基于Modbus—RTU的变频器组网技术,详述了网络通信参数设置与通信程序的设计,并以可编程序控制器和变频器的通信为例,开发了适用于工业现场的对多变频器进行状态控制和运行参数测试的监控软件,实现了由PLC和组态软件对变频器进行实时在线监控功能。经实践证明,软件运行稳定,效果良好。
This paper introduces the networking technology of inverter based on Modbus-RTU, details the design of network communication parameters and communication program, and takes the communication between programmable controller and frequency converter as an example, The frequency changer carries on the condition control and the movement parameter test the monitoring software, has realized by the PLC and the configuration software to carry on the real-time on-line monitoring function to the frequency changer. Proved by practice, the software is stable and works well.