The Four Layers Elevator Control System Design Based on S7-200 PLC

This paper analyzes the use of PLC technology in the design of the elevator system.Using the programmable controller to control the elevator, with simple wiring, programming, intuitive, easy extension, etc.When the building floor increases, the hardware wiring on the floor only need to increase the corresponding input signal; the original wiring does not need to change, only in the process of writing software to increase the function of the corresponding floor, so to change the place is relatively small .Use ladder diagram program can be very intuitive see operation process.The simulation results show that the elevator in adaptability, accuracy and reliability, reach the design requirements, shows that this design scheme is feasible.