plc在自动售货机控制系统中的应用毕设论文.doc

PLC在自动售货机控制系统中的应用 摘 要 随着社会不断的进步，机械化程度的迅速发展，自动化控制已在人们的生活中得到了广泛的运用，给人们带来了便利。 本论文利用PLC自动控制具有功能完备、灵活性、通用性好，程序输入方法简化，操作简单等优点，设计出了PLC自动控制售货机，自动售货机是一种高智能化的产品，操作简便，可以充分补充人力资源的不足，这种自动售货机外型结构体积小，安置区域广，给人们的生活带来了具大的方便。 该论文设计介绍了自动售货机的结构组成，包括投币控制按钮、选择饮料按钮、退币按钮、输出饮料端口、找钱端口和一些对应的指示灯；根据设计需要和经济综合因素的考虑，选用FX2N-32R型PLC的控制，这样就能够满足输入与输出控制，在设计中给出了控制系统的软硬件设计，并用GX7CH软件进行对梯形图的输入、调试与仿真，能够完全符合设计需求。 关键词：自动售货机，可编程序控制器，梯形图 PLC in the vending machine control system application ABSTRACT Along with the continuous progress of society, the degree of mechanization and rapid development of the already, automation control in peoples life has been widely used, has brought people convenient. This paper using PLC automatic control has excellent function, flexibility, high universality, input method simplified, simple operation etc, designed a PLC automatic control vending machine, automatic vending machine is a kind of high intelligent product, convenient operation, can full complement the lack of human resources, the vending machine exterior structure, small size, resettlement area wide, to the life of people brought great convenience. This paper introduced the vending machine design structure, including coin control button, select drink button, and withdrew money button, output beverage port, change port and some corresponding indicator; According to the design needs and economic comprehensive factors to consider, choose FX2N - 32R type PLC control, so that you can meet the input and output control, in the design of the control system is given in the design of the software and hardware of GX7CH software, and the input, commissioning ladder diagram with simulation, able to fully comply with the design requirements. KEY WORDS: Vending machine，Programmable logic control ，Ladder -diagram目 录 前　言 1 第1章 自动售货机简介 2 1.1 自动售货机的简介 2 1.2 采用PLC控制售货机的原因 2 1.3 自动售货机的功能 3 1.4 自动售货机工作原理 5 1.5 自动售货机设计思路 5 第2章 PLC自动售货机的硬件设计 7 2.1 设计目的 7 2.2 自动售货机的设计要求 7 2.3 I/O分配表和PLC的选型 8 2.4 外部接线图 9 2.5 编程流程图 10 第3章 PLC自