摘要
课题所研究的内容主要是用可编程控制器（PLC）来设计电梯自动控制系统。由于大部分老式电梯的电控系统可靠性欠佳，用户寻求对电梯的电控系统进行改造，以节约资金。因此，对电梯控制技术进行研究，找出一条适合国产老式电梯的改造之路，并进而提高国产电梯的技术水平和质量，具有十分重要的意义。针对老式电梯采用的继电器逻辑控制方式存在功能弱、故障多、可靠性差和工作寿命短等缺陷，提出采用功能强、故障率低、可靠性高的可编程控制器（PLC）来控制电梯。本设计就以PLC作为工具对升降电梯的各种操作进行控制。先对六层电梯的硬件部分作分析，看需要什么样的开关，电机，信号灯等。然后，画出它的控制面板图，再根据控制面板图估计一下I/O点数，这样可以确定所选机型，然后在软件设计，写出流程图，梯形图，写出语句。
关键词：电梯轿厢；升降运动；控制系统；PLC
Abstract
The main content of the study is to use programmable logic controller (PLC) to design the elevator automatic control system. As most of the old elevator electric control system reliability is poor, the user seeking to upgrade the elevator's electronic control system to save money. Therefore, the elevator control technology to find a suitable for the transformation of the old-fashioned elevator road, and thus improve the technical level of domestic elevator and quality, is of great significance. The relay control logic used in the old elevator has the advantages of weak function, many faults, poor reliability and short working life. It is proposed to use a programmable controller (PLC) with strong function, low failure rate and high reliability to control the elevator. The design of the PLC as a tool to lift the elevator to control a variety of operations. First on the six-story elevator hardware part of the analysis to see what kind of switch, motor, lights and so on. Then, draw its control panel diagram, and then according to the control panel diagram to estimate the I / O points, so you can determine the selected model, and then in the software design, write out the flow chart, ladder, write the statement.
Key words: elevator car; lifting movement; control system; PLC
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