1、本科毕业设计说明书（论文） I 摘摘 要要 本文介绍的是基于 PLC 的四层楼电梯控制系统。电梯是垂直方向的运 输设备，是高层建筑中不可缺少的交通运输设备。它靠电力，拖动一个 可以载人或物的轿厢，在建筑的井道内导轨上做垂直升降运动，在人们 生活中起着举足轻重的作用。而控制电梯运行的 PLC 系统也要求越来越 高，要求达到电梯运行的“稳、准、快” 的运行目的。该系统主要由PLC、 逻辑控制电路组成。其中包括交流异步电动机、继电器、接触器、行程 开关、按钮、发光指示器和变频器组成为一体的控制系统。本机控制单 元采用以西门子的可编程控制器 PLC 对机器进行全过程控制。而要想电 梯能稳定可靠的运行，
2、就需要一套精准的控制系统。电梯的控制系统有 很多种类，常见的有微机控制和 PLC 控制。研究目的是实现 PLC 对实际 机械系统的控制，拖动系统采用通用变频器实现对双速三相异步电动机 的控制。然后通过 V4.0 STEP 7 MicroWIN SP3 软件对 PLC 进行编程，最 后通过 SIMATIC S7-200 型 PLC 仿真来调试程序，从而验证了基于 PLC 的 四层楼电梯控制。 整个系统通过 PLC、逻辑控制电路对电梯的升降；加、减速；平层； 起动、制动控制。其结构简单、运行效率高、平层精度高、易于理解与 掌握。 关键词关键词：电梯；控制系统；PLC；变频器。 本科毕业设计说明书（
3、论文） II AbstractAbstract This article is about based on PLC four floors of elevator control system. The elevator is perpendicular directional of the conveyance equipments be indispensable in the high building of transportation equipments. It depends electric power, dragging along to move a car that c
4、an carry person or thing and lead a track in the building of the well way up do perpendicularity to ascend and descend sport, there is prominent function in the peoples life. And the control elevator circulate of the PLC system also has more and more high request, request to attain the movement purp
5、ose of “steady, quasi-, quick“ of elevator movement. That system mainly from PLC, logic control the electric circuit constitute. Include an exchanges difference to tread electric motor among them, after the electric appliances, get in touch with a machine, route of travel switch and press button, gi
6、ve out light the indicator constitute and transducer for the control system of integral whole. The this machine control unit adoption carries on whole process a control to the machine by the programmable controller PLC of Siemens company. But if you want let the elevator run stable and reliable,a precise control system is necessary.There are many kinds of the elevator control system,pc control system and plc control system are in common.Purpose of the study is realization of PLC control of
