目录
一、前言.................................................1
二、系统总体方案论证......................................2
（一）PLC工作原理.........................................3
（二）单片机的使用方案.....................................4
三、硬件电路设计..........................................5
（一）主要的控制系统应用.............................5
（二）显示电路设计.................................6
（三）功能模块设计...........................6

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.............................................................................6
（三）功能模块设计...........................................................................................................7
（四）继电器开关设计.......................................................................................................8
四、系统软件设计...............................................................................................................9
（一）主控单元设计...........................................................................................................10
（二）功能模块电路设计...................................................................................................11
（三）报警处理流程...........................................................................................................12
（四）水位监测设计...........................................................................................................13
五、硬件制作与系统调试...................................................................................................14
（一）硬件制作与组装.......................................................................................................15
（二）系统调试...................................................................................................................18
（三）系统初始化...............................................................................................................21
（四）调试中所出现的问题及解决方案...........................................................................28
结束语...................................................................................................................................29
致谢......................................................................................
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