目 录
第 1 章 引言 ........................................................................................................................................................1
1.1 设计要求.............................................................................................................................................1
1.2 控制要求...........................................................................................................................................2
1.3 流程图 ..................................................................................................................................................4
第 2 章 系统总体方案设计.............................................................................................................................5
2.1 整体结构.............................................................................................................................................5
2.2 机械结构.............................................................................................................................................5
2.3 控制元器件选型 ...............................................................................................................................6
2.3.1 接触器的选用 .....................................................................................................................6
2.3.2 时间继电器的选用 ............................................................................................................6
2.3.3 热继电器的选用.................................................................................................................6
2.3.4 中间继电器的选用 ............................................................................................................7
2.3.5 熔断器的选用.............................................................................................................................7
2.3.6 断路器的选用 .....................................................................................................................7
2.3.7 变压器的选用 .....................................................................................................................7
第 3 章 PLC 控制系统设计..............................................................................................................................9
3.1 主电路设计 ........................................................................................................................................9
3.2 交流控制电路设计 ........................................................................................................................10
3.3 主要参数计算 .................................................................................................................................10
3.4 接线....................................................................................................................................................10
3.5 I/0 点分配与编号.......................................................................................................................11
3.6 主电路图 ..........................................................................................................................................12
3.7 绘制硬件接线图及元件布置图 .................................................................................................13
