Design of Elevator Control System Based on PLC and Frequency Conversion Technology

As an indispensable means of transportation in modern buildings, elevators have become increasingly demanding in terms of safety, reliability, comfort, efficiency and energy saving. How to use the control method and the composition of the structure to be able to lift the elevator to provide better service and to better meet people's needs has always been the core of the field of elevator control research. This paper introduces an elevator control system based on Siemens S7-1200PLC and G120 inverter. The system takes PLC and inverter as the core control devices to realize the speed control of the tractor and the optimization control of elevator group control, and finally realizes the smooth running control function of two six-storey elevators. The simulation results show that the system can make the elevator run smoothly, safely and efficiently, and meet the design requirements.