Elevator System Base d on PLC Elevator System Based on PLCAbstractWith the development of China's economy, PLC applications are constantly popular, while driving the traditional control of the update, its application is extremely extensive. The elevator as a modern high-rise building a means of transport, and people's lives are inseparable, with the improvement of people's living standards, the elevator running safety, efficiency, comfort and other requirements also rose, making the elevator got Rapid development, the current way of controlling the elevator commonly used in two ways, one is composed of traditional relay control system; the second control method is to replace the PLC with programmable logic controller control system. The purpose of this design is to compare the advantages and disadvantages of the control system composed of the traditional relay and the control system of the PLC. The advantages of the PLC are reflected, and the S7-200 PLC is used to control the elevator, and the programming language is used to realize the Elevator automatic operation of the control function, which greatly improve the reliability of the elevator.Programmable controller (PLC) because of its simple structure, high reliability and easy maintenance, etc., can be very good for elevator control. Through the use of programmable controller S7-200 PLC control four-story elevator work, intuitive description of the four-story elevator PLC control system design method. Details of the four-story elevator through the PLC design requirements, the specific list of the input and output points, and gives the system ladder design.Key words: Programmable control devices；S7-200；PLC；Four-story elevatorComposed by the order of relay c...
