八层电梯的plc控制毕设毕业论文.doc

generational industry controller. In this thesis, I expound some concepts of PLC, the

design course of PLC control elevator and the protective methodology of elevator

hardware with PLC. In the design I explain the design course of hardware and

software about PLC control elevator, and the specific main hardware circuit. It also

analyzes the use of main input point and output point. In the PLC control system,

the using functions are achieved by control software. To have a better

correspondence relationship between control software and the action of elevator and

easy to debug and assert, I use pattern edit program. And explain three working