基于PLC的自动售货机控制系统设计

摘要在现如今社会的工业生产过程中，可编程逻辑控制器(PLC)是工业自动化生产的重要技术。本论文简要介绍了可编程逻辑控制器的一些基本知识和基础的用处，并介绍了PLC的技术特点，重点介绍了它的硬件、软件和组态软件的构成，以及它们在工业自动化中的典型应用，也粗略的介绍了PLC未来的一些情况。自动售货机在我国有非常大的发展空间。本文介绍了自动售货机的历史进程和现在的情况。在这个毕业设计项目中，我查阅了大量的信息，并设计了基于PLC原理的自动售货机系统。根据自动售货机的工作模式，把具体的售卖过程分成了几个模块：初始过程，过投币操作，价格比较过程，选择货物的过程，以及提取硬币的过程和最后的报警系统。并且我使用了梯形图案来完成各种过程的编程。关键词：自动售货机；PLC;系统设计ABSTRACTIn today's social industrial production process,programmable logic controller (PLC)is an important technology for industrial automation production.This paper brieflyintroduces some basic knowledge and basic uses of PLC,and introduces the technicalcharacteristics of PLC,focusing on its hardware,software and configuration software,as well as their typical applications in industrial automation.It also briefly introducessome future situations of PLC.Vending machines have great room for development in our country.This articleintroduces the history and current situation of vending machines.In this graduationproject,I consulted a lot of information and designed a vending machine system basedon PLC principle.According to the working mode of the vending machine,thespecific selling process is divided into several modules:the initial process,thecoin-passing operation,the price comparison process,the process of selecting goods,the process of extracting coins and the final alarm system.And I used trapezoidalpattern to complete the programming of various processes.Keywords:Vending machines;PLC;system design2