目录
摘 要................................................................1
第一章 概 述...........................................................2
1.1 PLC 的发展历程.....................................................................................................................................2
1.2 PLC 组成及特点.....................................................................................................................................3
1.2.1 硬件的可靠性
...............................................................................................................................3
1.2.2 编程简单，使用方便
...................................................................................................................3
1.2.3 接线简单，通用性好
...................................................................................................................4
1.2.4 可连接为控制网络系统
................................................................................................................4
1.2.5 易于安装，便于维护
...................................................................................................................4
1.3 PLC 的工作原理.....................................................................................................................................5
1.4 PLC 的编程语言.....................................................................................................................................6
1.5 PLC 在电梯上的应用.............................................................................................................................6
第二章 程控制器的机型选择...............................................8
2.1 控制电磁阀等所需的 I/O 点数 ............................................................................................................8
2.2 内存估计................................................................................................................................................8
2.2.1 内存利用率
...................................................................................................................................8
2.2.2 开关量输入输出的点数
................................................................................................................8
2.2.3 模拟量输入输出的总点数
............................................................................................................8
2.3 响应时间................................................................................................................................................9
2.4 输入输出模块的选择 ............................................................................................................................9
第三章 硬件设计........................................................10
3.1 硬件配置简介......................................................................................................................................10
3.2 电梯控制系统......................................................................................................................................10
3.3 电气控制系统框图..............................................................................................................................12
3.4 输入输出的分配..................................................................................................................................12
第四章 软件设计........................................................15
4.1 程序流程图..........................................................................................................................................15
4.2 电梯定向逻辑......................................................................................................................................18
4.3 四层电梯的梯形图设计 ......................................................................................................................19
第五章 系统调试........................................................20
5.1 硬件部分调试......................................................................................................................................20
5.2 软件部分调试......................................................................................................................................20
5.2.1 编辑、编译
.................................................................................................................................20
5.2.2 程序下载
.....................................................................................................................................21
5.2.3 程序监视、运行调试
.................................................................................................................21
总 结...............................................................22
致 谢...............................................................23
参考文献...............................................................24
