目录第1章引言........................................................11.1设计概述..........................................................11.2设计目标与意义....................................................11.3章节安排..........................................................2第2章方案论证与选型..................................................32.1设计任务分析......................................................32.2方案论证与选择....................................................32.2.1方案一........................................................32.2.2方案二........................................................32.3方案确定..........................................................3第3章硬件设备的介绍及硬件电路设计....................................43.1恒温水箱系统的基本组成............................................43.1.1控制系统......................................................43.1.2信息采集元件..................................................53.1.3加热元件与继电器..............................................63.2可编程控制器基本知识..............................................63.2.1可编程控制器的特点............................................73.2.2PLC的结构与原理..............................................73.2.3PLC输入/输出类型.............................................83.2.4转换原理......................................................93.3PLCI/O分配表....................................................93.4PLC外部接线图...................................................103.5恒温水箱系统整体外部硬件接线图...................................103.6变频器的介绍.....................................................113.6.1基本组成.....................................................113.6.2功能作用.....................................................113.7MCGS组态的介绍..................................................123.7.1MCGS组态的主要功能..........................................123.7.2MCGS的主要特点..............................................14第4章软件设计与设计分析.............................................164.1编程设计与分析...................................................164.2恒温水箱系统程序组件简单介绍..............