目 录
摘要....................................................................................................................I
Abstract............................................................................................................II
第一章 引 言.................................................................................................1
1.1 自动售货机的意义...................................................................................................1
1.2 自动售货机的研究现状...........................................................................................1
1.3 本次设计的研究内容...............................................................................................1
第二章 控制系统的选定.................................................................................2
2.1 控制系统的选择......................................................................................................2
2.2 PLC 的特点 ..............................................................................................................3
2.3 PLC 的主要功能 ......................................................................................................4
2.4 PLC 的基本结构及原理 ..........................................................................................4
第三章 自动售货机的功能分析.....................................................................8
3.1 自动售货机的简介...................................................................................................8
3.2 自动售货机功能分析...............................................................................................8
第四章 PLC 自动售货机的硬件设计...........................................................11
4.1 自动售货机面板设计.............................................................................................11
4.2 自动售货机外部电路接线图.................................................................................11
4.3 硬件设计原则.........................................................................................................12
4.4 硬件设计的基本内容.............................................................................................13
4.5 硬件设计要求.........................................................................................................13
4.6 PLC 模块选型，I/O 分配表 ..................................................................................14
第五章 PLC 自动售货机的软件设计...........................................................17
5.1 软件设计过程.........................................................................................................17
5.2 分布程序设计.........................................................................................................19
5.3 梯形图和指令表.....................................................................................................24
总 结.........................................................................................................25
致 谢.........................................................................................................26
参考文献.........................................................................................................27
附 录.........................................................................................................28
附录 A 梯形图..............................................................................................................28
附录 B 指令表 .............................................................................................................34
