外文翻译PLC控制下的电梯系统

Elevator System Based on PLCAbstractPeng D.The Application of PLC in Elevator Control System[J].Journal of Nanchang Institute of AeronauticalTechnology,2000.With the development of China's economy,PLC applications are constantly popular,while driving the traditional control of the update,its application is extremely extensive.Theelevator as a modern high-rise building a means of transport,and people's lives areinseparable,with the improvement of people's living standards,the elevator running safety,efficiency,comfort and other requirements also rose,making the elevator got Rapiddevelopment,the current way of controlling the elevator commonly used in two ways,one iscomposed of traditional relay control system;the second control method is to replace the PLCwith programmable logic controller control system.The purpose of this design is to comparethe advantages and disadvantages of the control system composed of the traditional relay andthe control system of the PLC.The advantages of the PLC are reflected,and the S7-200 PLCis used to control the elevator,and the programming language is used to realize the Elevatorautomatic operation of the control function,which greatly improve the reliability of theelevator.Programmable controller (PLC)because of its simple structure,high reliability and easymaintenance,etc.,can be very good for elevator control.Through the use of programmablecontroller S7-200 PLC control four-story elevator work,intuitive description of the four-storyelevator PLC control system design method.Details of the four-story elevator through thePLC design requirements,the specific list of the input and output points,and gives the systemladder design.Key words:Programmable control devices:S7-200:PLC;Four-story elevatorComposed by the order of relay control system is a realization of the first elevatorcontrol method.However,to enter the nineties,with the development of science andtechnology and the widespread application of computer technology,the safety of elevators,reliability of the increasingly high demand on the relay control weaknesses are becomingevident.Elevator control system relays the failure rate high,greatly reduces the reliability andsafety of elevators,and escalators stopped often to take with the staff about the inconvenience2