毕业设计说明书
全自动洗衣机控制系统的设计
学生姓名： 学号： 学 院：
专 业： 指导教师：
2014年6月
中北大学2014届毕业设计说明书
全自动洗衣机PLC控制系统的设计
摘 要
可编程控制器（PLC）是以计算机技术为核心的通用自动化控制装置，它的功能性强，可靠性高，编程简单，使用方便，体积小巧，近年来在工业生产中得到广泛的应用，被誉为当代工业自动化主要支柱之一。
本课题探讨了如何利用德国西门子PLC S7-200进行全自动洗衣机控制，并对硬件和软件部分进行了分析和设计，并给出了系统硬件接线图、PLC控制I/O端口分配表以及系统程序流程图等等，实现了系统的灵活性、可靠性和运行稳定性。
关键词：PLC，西门子S7-200，可靠性，全自动洗衣机
中北大学2014届毕业设计说明书
According to the full-automatic washing machine in PLC controls the
design of the system
Abstract
PLC is takes core to control devised the calculator technique as the in general use automation control equip to computer skills. Its function is strong, the reliability is high, the plait distance is simple, the usage is convenient, the physical volume is cleverly made, in these years, PLC is the extensive application, and drive for contemporary the industrial automation mainly pays one of the pillars.
The paper introduces how to use SIEMENS PLC S7-200 to control the full-automatic washing machine, and it analyzes and designs the hardware and software of the system, and presents the hardware wiring diagram, the I/O port distribution chart and the procedure flow chart etc. And it realizes the system’s flexibility, reliability and operation stability.
Keywords: PLC，Siemens S7-200，high reliability，full-automatic washing machine
中北大学2014届毕业设计说明书
目 录
1 引言 ...................................................................................................................................... 1 2 全自动洗衣机介绍 .............................................................................................................. 2 2.1 全自动洗衣机的类型 ....................................................................................................... 2 2.2 全自动洗衣机的基本结构 ............................................................................................... 2 2.2.1 洗涤脱水系统 ................................................................................................................ 3 2.2.2 进水排水系统 ................................................................................................................ 4 2.2.3 电动机及传动系统 ........................................................................................................ 5 2.2.4 电气控制系统 ................................................................................................................ 6 2.2.5 支承机构 ........................................................................................................................ 7 3 全自动洗衣机控制系统的控制方案设计 .......................................................................... 8 3.1 全自动洗衣机控制系统介绍 ........................................................................................... 8 3.2 具体控制内容设计 ........................................................................................................... 8 3.3 全自动洗衣机控制系统方案的选择 ............................................................................... 8 3.3.1 继电器控制方案 ............................................................................................................ 8 3.3.2 单片机控制方案 ............................................................................................................ 9 3.3.3 PLC控制方案 ................................................................................................................ 9 3.3.4 结论 ................................................................................................................................ 9 3.4 PLC介绍 ........................................................................................................................... 9 3.4.1 PLC的硬件结构 ............................................................................................................ 9 3.4.2 PLC的软件结构 .......................................................................................................... 10 3.4.3 PLC的设计步骤 .......................................................................................................... 10 4 控制系统的硬件设计 ........................................................................................................ 11 4.1 全自动洗衣机控制面板的布置设计 ............................................................................. 11 4.2 主电路的设计 ................................................................................................................. 11 4.2.1 电动机的选择 .............................................................................................................. 11 4.2.2 主电路图的设计 .......................................................................................................... 11
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中北大学2014届毕业设计说明书
4.3 PLC型号的选定 ............................................................................................................. 12 4.4 PLC的I/O口分配 ......................................................................................................... 12 4.5 PLC的定时/计数器说明 ................................................................................................ 13 4.6 PLC的外部接线图设计 ................................................................................................. 13 5 控制系统的软件设计 ........................................................................................................ 14 5.1 控制系统的流程图设计 ................................................................................................. 14 5.2 控制系统的顺序功能图设计 ......................................................................................... 15 5.3 控制系统的梯形图设计 ................................................................................................. 15 6 结束语 ................................................................................................................................ 21 参考文献 .................................................................................................................................. 22 致谢 .......................................................................................................................................... 23
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全自动洗衣机控制系统的设计
