自动售货机的PLC系统设计.doc

自动售货机的PLC系统设计.doc自动售货机的PLC系统设计
【摘要】
本文介绍了自动售货机的基本原理以及工作流程,然后以一次交易过程为例,把交易过程分为几个程序块,然后分别对程序块进行编程。具体说明了可编程序控制器在自动售货机中的作用。程序涉及到了自动售货机工作的绝大部分过程。利用PLC控制的自动售货机提高了系统的稳定性,保证自动售货机能够长期稳定运行。
关键词: 自动售货机;可编程序控制器;梯形图
Abstract:This paper introduces the basic principles of vending machines, as well as workflow, and then to a transaction process as an example, the transaction process is divided into several block, and then the block were programmed. Specify the PLC in the role of vending machines. Procedures related to the work of the vast majority of vending machine process. PLC control of the use of vending machines enhance the stability of the system to ensure that vending machines capable of long-term stable operation.
Key words:Vending machines; PLC; Ladder Diagram
目录
1 自动售货机功能分析........................................................................................3
自动售货机的基本功能..................................................................................3
PLC的选型原则............................................................................................3
PLC的概述 ......................................................................................................4
PLC的产生.................................................................................................4
PLC的定义.................................................................................................5
PLC的发展趋势.........................................................................................5
PLC的特点.................................................................................................5
PLC的主要功能.........................................................................................5
PLC的基本结构及原理.................................................................................6
PLC的系统结构.... ..................................................................................6
PLC各部分的作用....................................................