1、 毕业设计毕业设计( (论文论文) ) 题 目 自动电梯的自动电梯的 PLCPLC 控制设计控制设计 学 号 学生姓名 专业名称 机械工程及自动化 所在系（院） 电子与自动化系 指导教师 xx 2013 年 6 月 8 日 I 题目 自动电梯的自动电梯的 PLCPLC 控制设计控制设计 摘要 随着社会经济的不断发展，楼房越来越高，电梯成为了高层楼房的必须设备。国 内传统的电梯是由继电器控制。它不仅存在着可靠性差、成本高、故障率高等缺点， 而且在层数增加时，配线变化会给制造及安装带来诸多不变。PLC 控制电梯方法的出 现，很好地解决了以上的不足。 本文首先对电梯和 PLC 控制的特点进行了简要的
2、介绍。 并以四层电梯 PLC 控制系 统的设计为例，对 I/O 点数的分配与估计、PLC 的选型、电梯运动流程的规划、梯形 图的绘制等进行了详细阐述。最后通过模拟调试，成功验证了程序的可行性，实现了 电梯运行中的自动选向，开关门控制，自动达层，呼叫记忆等功能。 关键词 PLC 电梯 梯形图 控制系统 自动选向 II TitleTitle The escalator PLC control designThe escalator PLC control design Abstract With the constant development of social economy, the bui
3、ldings become higher and higher，and the elevator has already been the necessary equipment of the high-story buildings. In China, the traditional elevator is controlled by relay. It not only has the poor of reliability, high cost and high failure rate, but also inconvenient to manufacture and install
4、ation, because of the distribution changing when the layers increase. As the method of PLC control for elevators appeared, the shortcomings above have been solved perfectly. In this paper, a brief introduction of the elevator and PLC control system was given first. Then a PLC control system for a fo
5、ur-story elevator was designed as an example to describe how to estimate the number of the I/O points and distribute them, how to choose a PLC, plan the movement of the elevator, draw a ladder diagram in detail. Finally, the feasibility of the control system was verified by debugging on an OMRON PLC
6、. It was certified that the elevator with the PLC control system has all the functions expected. Such as: selecting the directions and making the door switch automatically, automatic landing, call memory etc. KeyKeywordswords PLC elevator ladder diagram control system III 目录 1.绪论 . 1 1.1 课题研究目的和意义 . 1 1.2 PLC 在电梯系统的应用现状与发展趋势 2 1.3 可编程控制器的特点 . 4 1.4 PLC 的用途 . 6 1.5 PLC 的工作原理 . 7 1.6 论文的主要研究内容 . 8 2.
