【毕业设计】m7120型平面磨床plc改造

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1、目录摘要...............................................................IAbstract...........................................................II前言...............................................................11M7120平面磨床简介................................................41.1M7120平面磨床的结构与性能......

2、..............................41.2M7120型平面磨床的结构及功能..................................51.3M7120平面磨床控制原理图......................................71.3.1M7120平面磨床原理图....................................71.3.2M7120平面磨床的工作概况及电路概述......................71.4M7120平面磨床的电气控制系统分析.........................

3、.....71.4.1M7120平面磨床电气控制特点与故障分析....................81.4.2M7120型平面磨床电气控制特点............................92PLC介绍........................................................112.1PLC的产生....................................................112.2PLC的特点..................................................

4、..112.3PLC的分类及原理..............................................122.4PLC工作原理..................................................122.5PLC的发展过程................................................122.6日本三菱PLC的介绍............................................122.6.1日本三菱（Mitsubish）PLC选择.................

5、..........122.6.2日本三菱PLC的介绍......................................133硬件设计........................................................143.1PLC的物理结构................................................143.2PLC型号的选择................................................153.2.1PLC型号及功能.......................

6、...................153.2.2功能简介...............................................173.2.3输入/输出点功能分配....................................18113.3PLC电气控制系统I/O设备的选择................................183.4PLC的外部接线图.............................................194软件设计....................................

7、.....................214.1功能介绍.....................................................214.2PLC控制程序分析..............................................244.2.1主轴电动机的控制.......................................244.2.2快速移动电动机的控制...................................254.2.3冷却泵电动机的控制.......