说明：  基于PLC的变频器应用实训系统的设计pdf。设计了基于PLC与人机界面（ＨＭＩ）的变频器应用实训系统，系统包含计算机及组态软件、PLC、变频器、接触器、传感器等典型的工业控制系统配置
(Based on PLC inverter application training system design pdf. Based on PLC and human machine interface (HMI), the application training system of frequency converter is designed. The system includes computer and configuration software, PLC, frequency converter, contactor, sensor and other typical industrial control system configuration)