三菱PLC控制的四层电梯毕业设计论文 本文介绍一种电梯 PLC 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、发光指示器组成为一体的控制系统。(Four storey elevator graduation design paper controlled by MITSUBISHI PLC A kind of elevator PLC control system is introduced in this paper. Elevator is a vertical transportation equipment, and it is an indispensable transportation equipment in high-rise buildings. It relies on electricity to drag a car that can carry people or things, and does a vertical lift in the guideway of the building's well. It plays an important role in people's life. And the PLC system that controls the operation of elevators also requires higher and higher requirements, so as to achieve the goal of "stable, accurate and fast" operation of elevators. The system is mainly composed of PLC and logic control circuit. It includes AC asynchronous motor, relay, contactor, stroke switch, button and luminous indicator.)