But if the power supply burns, the motherboard may not burn. It will burn in 30 minutes. The high probability is the quality of power supply. On the basis of introducing the basic structure of elevator, the working principle of elevator is deeply analyzed, the advantages and characteristics of PLC are expounded, the hardware design and software design of elevator are emphatically analyzed, and the realization scheme of elevator control system design based on PLC is studied and put forward. Finally, the research content of this paper is summarized and prospected.

In view of the present situation of elevator industry in China, this design applies programmable logic controller (PLC) to the five-story elevator for logic control. Through reasonable selection and design, not only the reliability, maintainability and flexibility of the elevator are improved, but also the service life is prolonged, the development cycle of the elevator is shortened, the control level of the elevator is improved, the comfort of the elevator operation is improved, and the elevator achieves the ideal control effect. Compared with the traditional elevator, the elevator designed in this paper has good running comfort, saving electricity in life, achieving good economic and social benefits and achieving the ideal purpose. Elevator control system has the functions of floor pointing, hall calling, floor selection and direction selection, manual and automatic, and has the characteristics of centralized control.