[信息与通信]基于plc四层客运电梯的毕业设计.doc

摘 要 PLC（可编程控制器）作为一种工业控制微型计算机，以其编程方便、操作简单尤其是它的高可控性等优点，在工业生产过程中得到了广泛的应用。：PLCAbstract PLC (programmable controller) as a kind of industrial control micro computer, with its programming convenient operation simple especially its advantages, such as high control, industrial production process in a wide range of applications. Introduced the four layers guest use elevator PLC control system of the overall design scheme design of process, for a list of the main hardware circuit I/O distribution table to elevator control ladder diagram. On the analysis of the random signal processing based on logic relationship, and points out that the PLC programming method, and has designed a set of complete the elevator control system scheme adopts the FX 2 N-48 MR mitsubishi elevator control system as PLC, more in-depth knowledge of elevator work. The elevator components: the elevator control system is mainly including electric drive system and the elevator control logic system. Electric drive control part mainly includes the elevator vertical direction drag circuit and the car the switch circuit, the performance of the stability of the elevator running has important influence. The elevator control logic is part of a large sensor with the call button control relay indicator and the control part of the core device (PLC) and other components, safe and reliable operation of the elevator is the key, is the elevator control automatic degree of important symbol. Key words: PLC 、programmable controller、 frequency converter、 electric control。 摘 要 1 Abstract 2 第一章 绪 论 4 1.1、PLC简介 4 1.2、PLC的特点 4 1.3、PLC的构成 6 1.4设计内容 6 1.5设计的目的和意义 7 第二章.电梯控制系统的分析 8 2.1电梯的组成 8 2.2电梯的工作原理 9 2.3电梯控制方法的分析 10 2.4 变频系统 11 2.5 变频器的选型 12 2.6电梯运行电机的选择 12 2.7 总体设计方案 13 第三章 控制系统硬件设计 15 3.1输入输出（I/O）分配 15 3.2硬件外部接线图 16 3.3梯形图 18 第四章 电梯运行与维护 31 第四章 电梯运行与维护 32 4.1电梯常见事故和排除方 32 结论 36 参考文献 37 致谢 38 第一章 绪 论 随着城市建设的不断发展，高层建筑不断增多，电梯在国民经济和生活中有着广泛的应用。电梯作为高层建筑中垂直运行的交通工具已与人们的日常生活密不可分。实际上电梯是根据外部呼叫信号以及自身控制规律等运行的，而呼叫是随机的，电梯实际上是一个人