基于plc的无人售货机控制系统设计.doc

摘  要

无人售货机是由劳动密集型的产业构造向技术密集型社会转变的产物。进入21世纪时，无人售货机也将进一步向节省资源和能源以及高功能化的方向发展。利用PLC控制的无人售货机提高了系统的稳定性，保证无人售货机能够长期稳定运行，且控制系统结构简单功能完善、通用性强、体积小，维护操作方便而且易于实现网络化。本文主要对无人售货机的控制系统进行了程序设计，并列出了控制系流程图以及梯形图。


关键词 ： 无人售货机; PLC; 控制系统; 设计


 


 


 


 


 


 


 


 


Design of the Dispenser Control System base on PLC

Abstract

 The digest this text has introduced the basic principle and workflow of the dispenser , then take transaction course as an example , divide the trade course into several procedure ones, then carry on programming to the procedure one separately. It has stated the role in dispenser of the controller of can programme ing that concrete. The procedure has involved most course that the dispenser worked. The dispenser utilizing PLC to control has improved systematic stability, it can be steady in a long-term to guarantee the dispenser and run.


Keywords：Dispenser;  PLC;  System being controlled;  Design

目 录


1 绪论 1

2 设计要求 1

3 系统结构 1

4 PLC的选择 2

5 PLC控制系统设计 3

5.1 售货机工作过程的分析 3

5.2 程序设计部分 4

5.2.1 程序设计说明 4

5.2.2 PLC程序设计 4

5.3 数据连接 12

5.3.1 定义I/O设备 12

5.3.2 设计 13

5.3.3 运行 18

6 结束语 19

致谢 19

参考文献 20

附录 21