With the development of science and

With the development of science and technology and the development of social economy, high-rise buildings have become the symbol of modern cities.As a vertical transport, elevators can transport large numbers of people and goods and play a vital role in buildings.The elevator is controlled by a programmable controller.Through reasonable choice and design, the control level of elevator can be improved effectively, and the control of elevator can achieve the ideal control effect.Design a ladder control system based on the Siemens s7-200plc.On the basis of introducing the elevator structure, the control requirements of the three-story elevator and how to realize the design, ladder, program debugging and experimental device in the elevator control system, the model of the elevator module QSPLC-III is analyzed.Simulation experiments were carried out in the elevator control system.