毕业论文（设计）
加热反应炉PLC控制系统的设计
学 生 姓 名： 郭 凯
指 导 教 师： 高艳萍(副教授)
专 业 名 称： 自 动 化
所 在 学 院： 信息工程学院
2011年 6 月
目 录
摘要 ················································································································ I Abstract ·········································································································· II 第一章 引言 ································································································ 1
1.1研究的目的和意义 ·································································································· 1 1.2国内外研究现状 ······································································································ 1 1.3研究的内容 ·············································································································· 1
第二章 控制系统设备简介 ········································································ 2
2.1 PLC的定义 ·············································································································· 2 2.2 PLC的特点 ·············································································································· 2 2.3 PLC的通信联网 ······································································································ 3 2.4 PLC的应用领域 ······································································································ 3 2.5 MCGS组态软件简介 ······························································································ 4 2.6 加热反应炉简介 ····································································································· 7
第三章 控制画面的创建 ············································································ 9
3.1工程的建立 ·············································································································· 9 3.2变量的定义 ·············································································································· 9 3.3控制画面的设计与制作 ························································································ 10 3.4动画连接 ················································································································ 11 3.5控制程序的编写 ···································································································· 11 3.6 数据显示画面的设计与制作 ··············································································· 12
第四章 控制系统的设计 ·········································································· 17
4.1加热反应炉对电气控制系统的要求 ···································································· 17 4.2系统设计方案 ········································································································ 17 4.3 对象和范围的确定 ······························································································· 19 4.4 电路设计 ··············································································································· 20
4.5系统硬件图设计 ···································································································· 20 4.6控制系统的软件设计 ···························································································· 23
第五章 系统抗干扰措施 ·········································································· 27
5.1 电磁干扰的类型及其影响 ··················································································· 27 5.2 电磁干扰主要来源 ······························································································· 27 5.3 加热反应炉控制系统的抗干扰措施 ··································································· 28
第六章 结论 ······························································································· 30 致谢 ············································································································· 31 参考文献 ····································································································· 32
大连海洋大学本科毕业论文（设计） 摘要 摘要
加热反应炉是工业生产中的重要设备，为了安全生产避免事故的发生，应用PLC 对它进行实时监控是非常必要的。本设计实现PLC对加热反应炉的可视化控制，该控制技术可以对真空炉的温度、真空度和水开关状态等参数进行检测，并根据操作前的设定值，进行升温和保温控制，实现加热反应炉内水位变化实时曲线和历史曲线的显示输出，当设备状态异常或各参数越限时立即报警。这不仅能进行安全生产，还可以提高经济效益减少不必要的人力物力的投入。该控制系统以可编程控制器为核心，通过专用数据线和上位机通信，利用组态软件对整个系统进行实时监控，模拟实验调试结果表明，PLC和MCGS的结合有利于PLC 控制系统的设计、检测，具有良好的应用价值。
关键词：加热反应炉，PLC，MCGS，监控，报警
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