南通职业大学毕业设计（论文） 基于 PLC 的自动售货机系统设计
目录
1 前言 ..............................................................1
1.1 论文研究的目的和意义 ........................................1
1.2 本文的设计目标 ..............................................1
1.3 技术路线 ....................................................1
2 系统整体方案设计..................................................2
2.1 系统结构设计 ................................................2
2.2 控制器选型 ..................................................3
(1)规模要适合................................................3
(2)功能要相当，结构要合理....................................3
(3)使用环境条件..............................................4
2.3 软件工具.....................................................5
(5) 兼容 GX Developer 软件。..................................6
3 硬件设计..........................................................6
3.2 PLC 接线图...................................................7
4 软件设计..........................................................8
4.1 软件流程设计 ................................................8
4.2 钱币累加程序模块 ............................................9
4.3 钱币比较与商品指示灯模块 ....................................9
4.4 出货模块 ...................................................10
4.5 找零及计算模块 .............................................11
4.6 售出成功后复位模块..........................................12
5 调试与仿真 .......................................................12
5.1 钱数为 13...................................................12
5.2 钱数为 18 ...................................................13
6 总结 .............................................................14
参考文献...........................................................15
致 谢..............................................................16
