With the continuous development of

With the continuous development of society, the building is higher and higher, and the elevator has become the necessary equipment of high-rise buildings. Elevator has developed from handle switch operated elevator and button controlled elevator to group controlled elevator, which has made indelible contribution to high-rise transportation.In order to let passengers use more comfortable, safer and more environmentally friendly elevator, it is necessary to analyze the elevator. There are the basic structure of PLC control system, the advantages and disadvantages of PLC application and elevator. PLC control overcomes many shortcomings of relay control elevator. It has the advantages of simple programming, improved operation safety, easy maintenance, good flexibility and expansion performance, and enhanced anti-interference ability. It is applied to the setting of elevator control system.The PLC control system mainly uses the logic switch control function of PLC to control the elevator door opening and closing, floor display, calling registration inside and outside the car hall, overload alarm, orientation, start acceleration, brake parking and other modules. These are to determine the input and output ports by analyzing the performance requirements of the elevator, then select the appropriate PLC model, and then allocate the I / 0 port