目录目录............................................................................................................................................1摘要...................................................................................................................................3第1章引言........................................................................................................................11.1设计概述.........................................................................................................................11.2设计目标与意义.............................................................................................................21.3章节安排.........................................................................................................................2第2章方案论证与选型........................................................................................................42.1设计任务分析.................................................................................................................42.2方案论证与选择.............................................................................................................42.2.1方案一.....................................................................................................................42.2.2方案二.....................................................................................................................42.3方案确定.........................................................................................................................4第3章硬件电路设计............................................................................................................53.1可编程序控制器简介.....................................................................................................53.2PLC的结构......................................................................................................................53.3PLC的主要功能..........................................................................................