本科毕业设计（论文）
题目 基于PLC的自动售货机的设计
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基于PLC的自动售货机的设计
摘 要
随着现在城市的发展规模越来越大，在很多公共场所都放置了自动售货机，方便快捷的满足了人们的需求，为人们在对简单物品采购的时候提供了一种便利。传统的一些自动售货机大多采用的是单片机控制方式，抗干扰的能力相对较差，系统硬件设计比较复杂，系统的稳定性以及可靠性很难得到保证，维修和维护困难。
本次设计一套基于PLC的自动售货机的控制系统，简单阐述了自动售货机的发展前景与背景，详细分析其主要功能和特点，提出了总的设计方案；此次设计基于WinCC和西门子S7-300PLC，主要是对自动售货机的硬件方面和软件方面进行仿真设计，采用了顺序控制的程序设计思路，设计了系统的控制程序，包括投币程序、购买程序和退币程序。
关键词：售货机 PLC 自动化 WinCC
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The design of the vending machine based on PLC
Abstract
Now with the development of the city scale is more and more big, the vending
machines were placed in many public places, convenient, satisfy people's demand for people at the time of purchase of simple items provides a convenient.Some of the traditional vending machine is mostly USES a single-chip computer control mode, anti-interference ability is relatively poor, the system hardware design is more complex, it is hard to guarantee the stability and reliability of the system, repair and maintenance difficulties.
The design of a vending machine based on PLC control system, simple expounds the development foreground and the background of the vending machine, detailed analysis of its main functions and characteristics, puts forward the total design scheme;This design based on WinCC and Siemens S7-300 PLC, mainly to the vending machine hardware and software aspects of simulation design, used the sequence control program design thinking, design the system control program, including the coin program, purchasing procedures and refund money.
Key words:Vending machine; PLC;automation;WinCC
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