基于PLC的自动扶梯控制
系统设计
摘要
自动扶梯是现代商场、超市不可缺少的运输工具，用于倾斜输送乘客、货物。传统的自动扶梯控制系统主要采用继电器--接触器进行控制，其缺点是触点多，故障率高、可靠性差、维修工作量大等，而采用 PLC组成的控制系统可以很好地解决上述问题。
本文通过讨论自动扶梯控制系统的组成，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，提出了自动扶梯的PLC控制系统总体设计方案、设计过程及最后的仿真结果，列出了具体的主要硬件电路、电梯的控制梯形图，并给出了系统组成框图和程序流程图。在分析、处理故障信号逻辑关系的基础上，提出了PLC的编程方法，设计了一套完整的自动扶梯控制系统方案。并进行了程序的调试，最终使用MCGS软件将整个控制界面用动画的方式展示了出来。
关键词：自动扶梯 PLC 梯形图 MCGS 控制系统
I
Control system design based on PLC
of escalator
Abstract
As an indispensable transportation tool for modern stores supermarkets, Escalator is used for carrying passengers, goods, the traditional escalator control system mainly adopts relays-contact device control, its shortcoming is contacts, high failure rate, poor reliability, maintenance workload big, etc, and use of PLC control system can well solve the problems.
This paper discussed the composition of the escalator control system, expounded the programmable controller (PLC) in the elevator control application, adopted the mode of programming which is used Siemens PLC program control , put forward the escalator PLC control system overall design scheme, design process and the final simulation results, list the major hardware circuit, the elevator control ladder diagram, and gave the system composition diagram and program flow chart. put forward PLC programming method based on the analysis and deal with the re fault signal , designed a set of complete escalator control system
II
scheme. And the adjustment of the program, and eventually used MCGS show the entire control interface out by animation.
Key words: Escalator PLC ladder diagram MCGS control system
III
目录
摘要 ............................................................................................................. I Abstract ...................................................................................................... II 第一章 引言............................................................................................... 1
1.1自动扶梯的发展和研究现状 ....................................................... 1
1.1.1自动扶梯的发展历史 .......................................................... 1 1.1.2国内自动扶梯的实例介绍 .................................................. 2 1.2自动扶梯的概述 ............................................................................ 4
1.2.1 自动扶梯的定义 ................................................................. 4 1.2.2 自动扶梯的基本结构 ......................................................... 4 1.2.3 自动扶梯的分类 ................................................................. 6 1.2.4 自动扶梯的主要参数 ......................................................... 7
第二章 S7—200系列PLC的概述 .......................................................... 8
2.1 PLC的定义 ................................................................................... 8 2.2 PLC的基本组成 ........................................................................... 8 2.3 可编程控制器的特点、分类和技术指标 ................................ 11
2.3.1可编程控制器的特点 ........................................................ 11 2.3.2可编程控制器的分类 ........................................................ 13 2.3.3 可编程控制器的技术指标 ............................................... 16 2.4 PLC的工作原理 ......................................................................... 17
2.4.1PLC的工作模式 ................................................................ 18 2.4.2 PLC工作过程 ................................................................... 19
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