摘 要
PLC（可编程控制器）作为一种工业控制微型计算机，它以其编程方便、操作简单尤其是它的高可靠性等优点，在工业生产过程中得到了广泛的应用。变频技术的发展推动了PLC的应用。它应用大规模集成电路，微型机技术和通讯技术的发展成果，逐步形成了具有多种优点和微型，中型，大型，超大型等各种规格的系列产品，应用于从继电器控制系统到监控计算机之间的许多控制领域。
随着社会的不断发展，楼房越来越高，而电梯成为了高层楼房的必须设备。电梯从手柄开关操纵电梯、按钮控制电梯发展到了现在的群控电梯，为高层运输做出了不可磨灭的贡献。
PLC在电梯控制上的应用主要体现在它的逻辑开关控制功能。由于PLC具有逻辑运算，计数和定时以及数据输入输出的功能。在电梯控制过程中，各种逻辑开关控制与PLC很好的结合，很好的实现了对电梯的控制。
本文主要讨论研究利用三菱公司的可编程控制器对五层电梯的控制，形成电梯控制系统。
关键词： 电梯；PLC；五层 变频器；
ABSTRACT
PLC (Programmable Logical Controller) took one kind most important, the application situation most industries control microcomputer, it is convenient, operation simple in particular by its programming merit and so on redundant reliability, obtained the widespread application in the industrial production process. It applies the large scale integrated circuit, the miniature machine technology and the communication technology development achievement, gradually formed had the many kinds of merits.
Along with society's unceasing development, the building is more and more high, but the elevator became the high level building to have the equipment. After humanity's more than centuries unremitting endeavors, the elevator already from the handle switch operation elevator, the push-button control elevator develops to the present group control elevator, has made the indelible contribution .
PLC in the control in the elevator the application mainly to manifest in its logical switch control function. This function enable PLC to have the logic operation, counts with fixed time as well as the data feeds output function. Rises and falls in the process in the elevator, each logical switch control and PLC very good union. This article main discussion studies using MITSUBISHI Corporation's PLC molding machine carries on the control to the 5-floor elevator fluctuation, forms the elevator control system
Key words: 5-floor , elevator; PLC;
目 录
摘要...................................................................Ⅰ
ABSTRACT..............................................................Ⅱ
1 绪论.................................................................1
1.1 国内外电梯的研究现状...............................................1
1.2 本次设计的目的和意义..............................................12
2 系统的方案分析与论证................................................13
2.1 电梯的控制要求....................................................13
2.2 系统的方案分析....................................................13
2.3 设计的步骤........................................................15
2.4 电梯控制系统的组成................................................16
2.5电梯的工作状态.....................................................17
3 变频器的设计.........................................................19
3.1 变频器的选择......................................................19
3.2 变频调速电梯的主电路..............................................20
4 七段数码显示电路的设计...............................................22
5主电路的设计..........................................................24
5.1主电路设备的选择...................................................24
5.2拖动电机主电路的设计...............................................25
5.3 门电机主电路的设计................................................26
6 可编程控制器的设计..................................................32
6.1 PLC的选型.........................................................32
6.2 可编程控制器的硬件设计............................................33
6.3 可编程控制器的软件设计............................................37
7 保护功能设置........................................................44
7.1 超速保护装置......................................................44
7.２轿厢超越上下极限位置，电梯制动装置................................45
7.３撞底缓冲装置......................................................46
7.4强迫换速装置.......................................................46
7.5无反馈保护.........................................................47
7.6超差保护...........................................................47
结束语.................................................................48
参考文献...............................................................49
致谢...................................................................50
附录...................................................................51
