基于PLC与变频器的电梯控制系统设计

摘要

为了提高电梯的运行性能改造我国老式电梯，在四层电梯控制系统中运用三菱PLC与变频器，设计了PLC控制系统的硬件电路及控制程序，通过PLC控制变频器实现了四层电梯的上升与下降、开关门及楼层显示等控制，给出了变频器具体的参数设置。实际运行表明，该控制系统运行平稳、安全可靠，节约电能。%In order to improve the performance of the elevator and transform the old-fashioned ones in our country, the four layers of elevator control system adopts Mitsubishi PLC and frequency converter. The hardware circuit and control program of PLC control system is designed. Through the PLC control frequency converter, the four levels' rising and falling of the elevators, opening and closing of the doors and floor display control are achieved and the setting of converters' frequency parameters is given. Actual operation shows that the control system saves power and operates smoothly, safely and reliably.