目 录
第1章 绪论 ....................................................................................................................1
1.1课题研究背景......................................................................................................1
1.2自动售货机设计目的和意义..............................................................................2
1.3自动售货机功能分析..........................................................................................2
1.3自动售货机发展趋势..........................................................................................3
第2章 自动售货机硬件结构设计 ..........................................................................4
2.1PLC的硬件组成 ....................................................................................................4
2.2电机的选择 ..........................................................................................................4
2.3货币处理装置 ......................................................................................................7
2.4送出机构 ..............................................................................................................7
2.5按钮装置 ............................................................................................................10
2.6 显示装置 ..........................................................................................................10
2.7 本章小结 ..........................................................................................................11
第3章 总体设计方案................................................................................................12
3.1自动售货机系统 ................................................................................................12
3.1.1硬件系统的组成部分及工作流程.........................................................12
3.1.2控制子系统简述.....................................................................................13
3.1.3PLC的选择..............................................................................................13
3.2 PLC控制系统设计编程要求及基本原则........................................................14
3.2.1编程要求.................................................................................................14
3.2.2基本原则.................................................................................................15
3.3 系统硬件结构框图 ..........................................................................................16
第4章 自动售货机控制系统设计 ........................................................................18
4.1自动售货机控制方案设计................................................................................18
4.2 PLC选型 .............................................................................................................18
4.2.1PLC概述..................................................................................................18
4.2.2PLC的主要功能.....................................................................................19
4.2.3 I/O点估算和PLC选型...........................................................................20
4.3 I/O地址设计......................................................................................................21
4.4 流程设计 ..........................................................................................................22
4.5PLC与现场器件的连接 ....................................................................................24
4.6 程序设计..........................................................................................................25
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