三菱plc自动售货机.doc

三菱plc自动售货机.doc基于PLC控制的自动售货机
摘要
本文设计一套基于PLC的自动售货机控制系统,阐述了自动售货机的发展背景与前景,详细分析其功能和特点,提出了总体设计方案;选用型号为L293D的步进驱动电机,设计了平面式贮币、电磁阀退币的货币处理装置,双螺旋式的送出机构,为降低成本和开发周期,创造性的选用了集成键盘、显示、设置功能的控制面板;以三菱FX2N-32MR型PLC为主控制器,基于GX Developer编程软件,采用顺序控制的程序设计思路,设计了系统控制程序,包括投币程序、比较选择购买程序和退币程序。
该设计提高了自动售货机的可靠性和执行效率,且系统维护容易,维修简单,有一定的市场推广价值。
关键词:自动售货机,可编程序控制器,梯形图
ABSTRACT
In this paper, based on the design of a vending machine control system PLC, describes the development background and foreground of the vending machine, a detailed analysis of its features and characteristics, put forward the overall design scheme; selection of models for the stepping motor driver L293D is designed plane type storage credits, solenoid valves coin money handling apparatus, the double spiral feeding mechanism, to reduce costs and development cycle, creatively selected integrated keyboard, display and setting function of the control panel; Mitsubishi FX2N-32MR-type PLC as the main controller, based GX Developer programming software, the use of sequential control program design ideas, designed the system control program, including coin program, compare and select your purchase coin program.
This design improves the reliability and efficiency of the vending machine, and the system is easy to maintain, easy maintenance, there are some marketing value.
Keywords: vending machines, programmable logic controller ladder

目录
第1章绪论 1
1
2
2
3
第2章自动售货机硬件结构设计 4
4
4
7
7
10
显示装置 10
本章小结 11
第3章总体设计方案 12
12
12
13
13
PLC控制系统设计编程要求及基本原则 14
14
15
系统硬件结构框图 16
第4章自动售货机控制系统设计 18
18
PLC选型 18
18
19
I/O点估算和PLC选型 20
I/O地址设计 21
流程设计 22
24
程序设计 25
25
投币程序 26
26
27
27