## PLC的多层电梯控制设计+梯形图

The multi-layered elevator control design of Siemens                      PLC
Abstract:Elevator is a kind of important equipments which realizes transportation,as well as large industrial products which combines machine and electricity complexly.It has perfect machine structure for special use and complexly electrical control components.The elevator(model) automatic control system,which is controlled by PLC,is a classical example for industrial process and building automation control and an ideal study target about the practical teaching for the courses such as PLC and electrical control.

According to the PC-JX elevator model of five floors in Automation Laboratory,PLC control system of elevator model is developed in order to make sure its reliable and effective run.This paper systematically analyzes the combination and function of PLC control system.And then signals synthesis,directional control, stopping at certain storey,door control are accomplished by using the ladder diagram.All functions combines closely each other to make its working stable, coordinate,orderly and reliable.The experiment result dedicates the design and implementation for PLC control system of five-floor elevator model in the paper is correct and practical.
Though a lot of research work have been done in this paper,there are still lots of problems to be studied and improved, for example,the improvement of control strategy and implement of computer-monitored etc.
Key words: PLC ;five-floor elevator model; control system;Ladder diagram

1绪论       1
1.1 课题的研究背景及意义     1
1.2 国内外发展状况     2
1.3 课题研究的内容    3
2电梯的综述       4
2.1 电梯的组成及功能    4
2.2 电梯的历史与发展     5
2.3 电梯的分类    7
2.3.1 按用途分类    7
2.3.2 按驱动方式分类    7
2.3.3 按速度分类    8
2.3.4 按电梯有无司机分类    8
2.3.5 按操纵控制方式分类    8
2.3.6 特殊电梯    8
3可编程控制器（PLC）简介    9
3.1 PLC的定义和特点    9
3.1.1 PLC的定义    9
3.1.2 PLC的特点    9

3.2 PLC的结构及工作原理     10
3.2.1 PLC结构     10
3.2.2 工作原理     11
3.3 PLC的应用领域    11 PLC的多层电梯控制设计+梯形图:http://www.lwfree.cn/zidonghua/20180416/13438.html
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