三层电梯的PLC控制系统 毕业论文.doc

摘 要 本论文通过讨论电梯控制系统的选择与介绍，阐述可编程控制器（PLC）在电梯控制中的应用，采用西门子PLC编程的程序控制方式，提出了三层电梯的PLC控制系统总体设计方案、设计过程、组成， 列出了具体的主要硬件电路、电梯的控制梯形图及指令表。并给出了系统组成框图和程序流程图，在分析、处理随机信号逻辑关系的基础上，提出了PLC的编程方法，设计了一套完整的电梯控制系统方案。采用本方案实现电梯控制，能够解决继电器——接触器触点多，故障率高、可靠性差、安装调试周期长、维修工作量大、接线复杂等缺点。使电梯运行更加安全、方便、舒适。 触摸屏在很多方面都有应用，本文简单介绍了触摸屏的知识，并用EB8000软件画出了电梯的监视画面，使电梯的运行更加的清晰安全。 PLC、自动控制 Abstract The present paper through the discussion elevator control system choice and the introduction, elaborated programmable controller (PLC) in the elevator control application, uses Simens the PLC programming the procedure control mode, proposed three elevator PLC control system overall project designs, the design process, the composition, have listed the concrete main hardware electric circuit, the elevator control trapezoidal chart and the instruction list.And has given the system composition diagram and the program flow diagram, in the analysis, in the processing random signal logic relations foundation, proposed the PLC programming method, has designed a set of complete elevator control system plan.Uses this plan realization elevator control, can solve the relay - - contact device electronic contact to be many, the failure rate high, the reliability bad, installs the debugging cycle long, the service work load big, the wiring complex and so on the shortcomings.Causes the elevator movement to be safer, to be convenient, is comfortable. The touching screen all had the application in very many aspects, this article introduced simply the touching screen knowledge, and has drawn the elevator surveillance picture with the EB8000 software, caused the elevator the movement even more clear security. Key word: Three elevators, touching screen, PLC, automatic control 第一章 绪论 1.1 课题的研究背景及意义 电梯是高层宾馆、商店、住宅、多层厂房和仓库等高层建筑不可缺少的垂直方向的交通工具。随着社会的发展，建筑物规模越来越大，楼层越来越多，对电梯的调速精度、调速范围等静态和动态特性提出了更高的要求。 电梯是集机电一体的复杂系统，不仅涉及机械传动、电气控制和土建等工程领域，还要考虑可靠性、舒适感和美学等问题。而对现代电梯而言，应具有高度的安全性。事实上，在电梯上已经采用了多项安全保护措施。在设计电梯的时候，对机械零部件和电器元件都采取了很大的安全系数和保险系数。然而只有电梯的制造，安装调试、售后服