采用Modbus通讯协议完成PLC和变频器的变频控制系统设计,可实现对变频器运行控制、工作状态的远程监控以及参数设置和调整.基于通讯方式设计的变频控制系统,不仅提高了变频器的抗干扰性和工作可靠性,同时减少系统的接线,便于实现联网和集中控制,降低生产成本,提高产品竞争力,在实现系统集成化和远程设置方面具有重要意义.%The Modbus communication protocol is used to design the PLC and frequency conversion control system of the inverter which can be used to realize the inverter running control,parameter setting and tuning and remote monitoring of the working state.The frequency conversion control system based on communication mode design is not only used to improve its anti-interference and the work reliability,but also reduce the wiring system,thus easily realizing the networking and centralized control,reducing the production cost and improving the product competitiveness.It is of great significance in the realization of the system integration and the remote settings.
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