基于西门子s7200的自动售货机设计业设计论文.docx

毕业设计（论文）专用纸 第 第 PAGE \* MERGEFORMAT III页 摘要 本文阐述了自动售货机的设计概论、研究意义以及它的发展历史，对自动售货机的方案进行了论证。本设计采用西门子s7-200系列PLC作为控制系统，介绍了PLC的基本组成、发展以及特点。文中详尽地介绍了自动售货机的原理以及各硬件组成，PLC外部接线图，并与按钮指示灯相结合进行人机交互，以完成交易。本设计编程部分采用了西门子专用编译软件进PLC梯形图的编写。基于西门子s7-200系列PLC控制的自动售货机具有很高的稳定性，保证自动售货机能够长期运行。 关键词：PLC，自动售货机，梯形图  Abstract This paper expounds the introduction to the design of the vending machine, the research significance and the development history of it, and demonstrates the scheme of it. This design scheme adopts the Siemens s7-200 series PLC as the control system, and introduces the basic structure, development and characteristics of the PLC. This paper introduces the principle of the vending machine and the hardware composition and PLC external wiring diagram, and combined with buttons and indicator lights for human interaction in order to complete the transaction. This design programming part adopts Siemens compiler software into the writing of the PLC ladder diagram. The Siemens PLC control-based vending machine has high stability to ensure the vending machine can run for a long time. Keywords: PLC, vending machine, ladder diagram  TOC \o 1-3 \h \z \u 目录 HYPERLINK \l _Toc32172 1 绪论 PAGEREF _Toc32172 1 HYPERLINK \l _Toc3107 1.1课题研究背景、目的以及意义 PAGEREF _Toc3107 1 HYPERLINK \l _Toc717 1.2自动售货机的历史沿革与发展前景 PAGEREF _Toc717 1 HYPERLINK \l _Toc17489 1.3本设计的基本要求 PAGEREF _Toc17489 3 HYPERLINK \l _Toc11309 1.4 自动售货机设计的基本思路 PAGEREF _Toc11309 3 HYPERLINK \l _Toc22670 2 PLC概述 PAGEREF _Toc22670 5 HYPERLINK \l _Toc11256 2.1 PLC的产生以及定义 PAGEREF _Toc11256 5 HYPERLINK \l _Toc23236 2.2 PLC发展趋势 PAGEREF _Toc23236 6 HYPERLINK \l _Toc31541 2.3 PLC的硬件组成与工作原理 PAGEREF _Toc31541 8 HYPERLINK \l _Toc23445 2.4 PLC的编程语言 PAGEREF _Toc23445 9 HYPERLINK \l _Toc23757 3 自动售货机的整体设计 PAGEREF _Toc23757 10 HYPERLINK \l _Toc31696 3.1自动售货机控制面板图 PAGEREF _Toc31696 10 HYPERLINK \l _Toc22963 3.2电机的选择 PAGEREF _Toc22963 11 HYPERLINK \l _Toc26229 3.4钱币识别器 PAGEREF _Toc26229 12 HYPERLINK \l _Toc13038 3.5电磁阀的选择 P