基于PLC的电梯控制系统设计

Design of Elevator Control system based on PLCAbstract:With the rapid development of China's national economy,increasing thedegree of modernization,many high-rise buildings,elevators also will be increased,elevator products in people's material and cultural life of the position has beenenhanced to become one of the important transportation equipment.Domestic onesthe elevator control is a relay,contactor composition.He was not only the existence ofpoor reliability,high cost,high failure rate and other shortcomings,and buildinglayers increases,changes to the manufacturing and installation of wiringinconvenience.If using PLC control to solve the above deficiencies.First,respectively expounds elevator relay control and PLC control features,outstanding tells relays of elevator control system exposed shortcomings and PLC ofelevator control system has the advantages,secondly,in the domestic and foreignrelevant document read many of the basis of materials,the elevator technology andthe development of elevator equipment are reviewed.Then introduces PLC selectionprinciples and PLC control system design train of thought;On this basis,according tothe elevator system itself working condition requirements,elevator systems PLCsoftware development,through the software development of characteristic,combiningPLC itself,the design gives the control law can realize a certain function PLCelevator control system.The design of the PLC as a tool for the elevator on the ginger to control the variousoperations.The first part of the hardware to do three of the elevator and see what kindof switches,signals and so on.Then,the control panel to draw his map,according to I/O points to determine the PLC model,and finally the original design,draw flowchart,write the ladder,followed by computer simulation.KEY WORDS PLC elevator control system