plc自动售货机.doc

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专科毕业设计（论文）
设计题目：自动售货机的PLC控制系统设计
系部
2017年4月
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摘要
本论文设计的是瓶装饮料的自动售货机，选用三菱公司的FX系列型号为FX2N-48MTPLC。首先，本文先介绍了自动售货机发展过程，工作原理，系统结构，讲述了自动售货机的贩卖商品的过程。根据自动售货机的功能分配需要多少输入和输出点数，选择合适的PLC型号，绘制系统硬件接线图，然后选择所需的数码管显示、电动机和接触器等。根据系统的功能来编写自动售货机的梯形图程序。本次饮料自动售货机能够做到钱币的识别和累计、饮料种类的选择、饮料出货以及钱币找零退币等等功能。
关键字自动售货机 PLC 梯形图
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Abstract
The design of the vending machine for the beverage vending machines, based on Japan's Mitsubishi FX series PLC. To FX2N-48MT model PLC as the core, set up the vending machine control system, the nature of goods sold , analyze the structure and working principle of the vending machine, understand the vending process of the vending machine, make the hardware wiring diagram through the function analysis of the vending machine, choose the PLC, the digital tube display, the motor and the contactor according to the hardware selection. Select the PLC according to the I / O allocation ladder program of the vending machine is written by writing a flow chart of the control system. The vending machine can realize the identification and accumulation of coins, the selection of beverage goods and the function of automatically ejecting the receipt and the coin. The ladder diagram is done by GX Developer. After