目 录
1 绪论 .........................................................2
1.1 PLC 的基本概念 ............................................................................................5
1.2 PLC 的诞生 ....................................................................................................5
1.3 PLC 的特点 ....................................................................................................6
2 PLC 的介绍 ....................................................................................................7
2.1 PLC 的流派 ....................................................................................................7
2.2 PLC 的结构和工作原理 ........................................8
3 PLC 的应用领域 .............................................................................................11
3.1 开关量的逻辑控制.......................................................................................11
3.2 模拟量控制...................................................................................................11
.3.3 运动控制......................................................................................................12
3.4 过程控制.......................................................................................................12
3.5 数据控制.......................................................................................................12
4 PLC 的基本结构 .............................................12
4.1 中央处理单元...............................................................................................13
4.2 存储器..........................................................................................................13
4.3 I/O 模块..........................................................................................................14
4.4 电源..............................................................................................................15
4.5 底板或机架..................................................................................................16
4.6 PLC 系统的基本设备 ..................................................................................16
5 PLC 的基本工作原理 .....................................................................................16
