基于PLC的四层电梯控制系统毕业论文.docVIP

PAGE X X 大 学 X X 校 区 毕 业 设 计（论文） 题 目：基于PLC的四层电梯控制系统设计 系 别：信息工程系 专 业：电气自动化 班 级： 学 生： 学 号： 指导教师： 职称： 摘 要 国民经济的飞速发展，现代化程度日益提高，高层建筑越来越多，电梯也随之增多，电梯产品在人们物资文化生活中的地位得到了提高，成为重要的运输设备之一。国内传统的电梯控制系统是由继电器、接触器构成。它不仅存在着可靠性差、成本高、故障率高等缺点，而且在层数增加时，配线变化给制造及安装带来诸多不便。若用可编程控制器（PLC）控制就解决了以上的不足。 本设计就以可编程控制器（PLC）作为工具对升降电梯的各种操作进行控制。先对四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，然后再设计软件，写出流程图，梯形图，写出语句。 最后是进行调试，看看此程序是否可行。 关键词：四层电梯；控制系统；可编程控制器 ABSTRACT The rapid development of the national economy, the increasing degree of modernization, more and more high-rise buildings, elevators also will be increased, Elevator products in people′s material and cultural life of the status has been enhanced to become one of the important transport equipment. Traditional domestic elevator control from the first relay , a contactor .Traditional domestic elevator control from the first relay, a contactor . It is not only poor in the reliability ,high cost, high failure rate shortcomings, but also in layers increases, changes to the wiring and installation of manufacturing has brought many unchanged, If the control by PLC to address the above shortcomings. The design of the PLC as a tool to the elevators for various operating control. Elevator on the first four parts of the hardware analysis, the need to see what kind of switches, motors, lights, etc...Then, the control panel draw maps, plans, under the control panel is estimated to I/O points, so certain selected models, and then software design. Write flowchart. Ladder diagram. Write statements. Finally, debugging and look at the feasibility of this procedure. Key words: elevator control PLC 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc374032783 第1章 绪论 PAGEREF _Toc374032783 \h 1 HYPERLINK \l _Toc374032784 1.1 课题的研究背景及意义 PAGEREF _Toc374032784 \h 1 HYPERLINK \l _Toc374032785 1.2 电梯的简介 PAGEREF _Toc374032785 \h 2 HYPERLINK \l _Toc374032786 1.2.1 电梯的起源 PAGEREF _Toc374032786