1.3
电梯的基本结构
...............................................................................................................................................3
1.4
电梯的分类
.......................................................................................................................................................5
第 2 章 可编程控制器简介 ........................................................................................................................................6
2.1
PLC 的结构及各部分的作用
............................................................................................................................6
2.2
PLC 的工作原理
................................................................................................................................................7
2.3
PLC 的编程语言
................................................................................................................................................8
2.4
PLC 基本指令
....................................................................................................................................................8
2.5
梯形图设计规则
...............................................................................................................................................11
第 3 章 三层电梯 PLC 控制系统设计 ......................................................................................................................12
3.1
电梯的控制要求
.............................................................................................................................................12
3.2
三层电梯主电路
.............................................................................................................................................12
3.3
输入输出点数分配
.........................................................................................................................................12
3.4
PLC 外围接线图
..............................................................................................................................................13
3.5
功能指令表概述
.............................................................................................................................................14
3.6
程序分析
.........................................................................................................................................................15
3.7
三层电梯梯形图程序
.....................................................................................................................................19
3.8
三层电梯助记符语句程序
.............................................................................................................................21
3.9
本系统的不足及改进
.....................................................................................................................................27
结 束 语 ......................................................................................................................................................................29
致 谢 ......................................................................................................................................................................30
参考文献 ......................................................................................................................................................................31
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