学号：（宋体五号粗体）常州大学毕业设计（论文）外文翻译Elevator System Based on PLC外文题目Elevator System Based on PLC译文题目(宋体四号粗体)外文出处(四号粗体)学生(宋体四号粗体)学院（宋体四号粗体）专业班级（宋体四号粗体）校内指导教师（宋体四号粗体）专业技术职务（宋体四号粗体）校外指导老师（宋体四号粗体）专业技术职务（宋体四号粗体）二018年4月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 inconvenience2and fear.And the event rather than taking the lift or squat at the end of the lift will not onlycause damage to mechanical components,but also personal accident may occur.Programmable Logic Controller (PLC)is the first order logic control in accordance withthe needs of developed specifically for industrial environment applications to operate theelectronic digital computing device.The PLC biggest characteristics lie in:The electricalengineering teacher already no longer electric hardware up too many calculations of cost,aslong as order the importation that the button switch or the importation of the sensors order tolink the PLC up can solve problem,pass to output to order the conjunction contact machine orcontrol the start equipments of the big power after the electric appliances,but the exportationequipments direct conjunction of the small power can.PLC internal containment have the CPU of the CPU,and take to have an I/O for expandof exterior to connect a people's address and saving machine three big pieces to constitute,CPU core is from an or many is tired to add the machine to constitute,mathematics that theyhave the logic operation ability,and can read the procedure save the contents of the machineto drive the homologous saving machine and I/Os to connect after pass the calculation;The I/O add inner part is tired the input and output system of the machine and exterior link,anddeposit the related data into the procedure saving machine or data saving machine;The savingmachine can deposit the data that the I/O input in the saving machine,and in work adjustingto become tired to add the machine and I/O to connect,saving machine separately savingmachine RAM of the procedure saving machine ROM and dates,the ROM can do deposit ofthe data permanence in the saving machine,but RAM only for the CPU computes thetemporary calculation usage of hour of buffer space.The PLC anti-interference is very and excellent,our root need not concern its servicelife and the work situation bad,these all problems have already no longer become the topicthat we fail,but stay to our is a concern to come to internal resources of make use of the PLCto strengthen the control ability of the equipments for us,make our equipments more gentle.PLC language is not we imagine of edit collected materials the language or language ofCs to carry on weaving the distance,but the trapezoid diagram that the adoption is originalafter the electric appliances to control,make the electrical engineering teacher while weavingto write the procedure very easy comprehended the PLC language,and a lot of non-electricityprofessional also very quickly know and go deep into to the PLC.3