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论文编号:ZD950 论文字数:13944,页数:32
摘 要
随着工业自动化的迅猛发展，DCS、PLC等控制系统在工业领域的广泛应用，安装有DCS、PLC、安全栅柜、端子柜、操作站、上位机等关键控制设备的中央控制室在工厂或企业的核心地位得到充分的肯定[1]，中央控制室作为工厂控制系统的一部分，其功能要求（如防电磁干扰、防辐射、防爆、防水、防静电、防鼠，合理的温度、湿度等）在设计上已经逐步规范、完善；中央控制室根据布局划分，基本包括：操作室、上位机室、机柜室、配电室、走廊、辅助人员工作室，一般设有专用中央空调集中负责温度、湿度控制。但是我们发现在夏季经常因为中控室空调主机发生故障，机柜室超温报警，而DCS等电子卡件在高温环境下运行容易发生故障，为了应急许多用户只好钻穿中央控制室的防爆墙，在控制室临时安装几台柜式空调机；而机柜室温度正常时，操作人员却要经常穿着棉衣工作的奇怪现象。
关键词：中央空调系统 组态软件 监控
Abstract
With the rapid development of industrial automation, DCS, PLC and other control systems in a wide range of industry applications, the installation of DCS, PLC, safety barrier, terminal cabinets, operator station, host computer control equipment and other key central control room in a factory or the core of enterprises are fully sure that, the central control room as part of the factory control system, its functional requirements (such as anti-electromagnetic interference, radiation, explosion-proof, waterproof, anti-static, anti-rat, a reasonable temperature, humidity etc.) in the design have been gradually standardized, improved; central control room in accordance with the layout of division, the basic include: operating room, PC room, cabinet room, power distribution room, corridors, studio support personnel, the general has a special focus on the central air-conditioning responsible for temperature and humidity control. However, we found that often in the summer air-conditioning control room in the system breakdown, over-temperature alarm cabinet room, and the DCS, such as e-cards to run in high-temperature environment prone to failure, many users had no choice but to emergency drilling blast walls of the central control room in the control room a few temporary tank installed air-conditioning units; and cabinet room temperature normal, operators often have to work wearing a strange coat.
Keywords：Central air-conditioning system Configuration Software Monitoring
目 录
中文摘要……………………………………………………………………………. . .………..I
英文摘要……………………………………………………………………………. . .………..II
目录……………………………………………………………………………. . .………………III
1 前言……………………………………………………………………………………………1
2 中央空调系统的总体设计思路和原理………………………………………………. .2
2.1 总体控制方案…………………………………………………………………….……2
2.2 设计观点…………………………………………………………………………….... 2
2.2.1 采用不同空调机组，相互独立的温度设定控制……………………………3
2.2.2 自由化设计……………………………………………………………………3
2.2.3 系统采用冗余化设计…………………………………………………………3
2.2.4 温度实时监控设计……………………………………………………………3
2.3 主要功能实现方法……………………………………………………………. . .……3
2.4 中央空调新风系统的原理…………………………………………………………. . .4
2.5 中央空调的监控设计……………………………………………………………. . .…4
2.5.1 新风机组的监测控制…………………………………………………………5
2.5.2 全空气空调机系统的监控设计………………………………………………5
2.5.3 风机盘管系统的监控设计……………………………………………………7
2.5.4 中央空调的制冷系统的监控设计……………………………………………7
3 硬件组态…………………………………………………………. …………. …………. ..9
3.1 西门子PLC的你S7-300的简介……………………………………………………..9
3.2 由PLC组成的中央空调系统…………………………………………………………11
3.2.1 PLC输入信号的构成…………………………………………………………..11
4 软件组态…………………………………………………………………………. . .………14
4.1 力控组态软件的简介 ………………………………………………………………..14
4.2 上位机对新风系统的监控……………………………………………………………14
4.2.1 绘制新风系统的组态界面…………………………………………………..15
4.2.2 创建监控点和PLC连接……………………………………………………...17
4.2.3 脚本程序……………………………………………………………………..19
4.2.4 报表和实时曲线……………………………………………………………..21
4.2.5 与关系数据库的连接……………………………………………………….23
5 系统的调试………………………………………………………………………………....25
5.1 组态界面的调试………………………………………………………………………25
5.2 与数据库的连接………………………………………………………………………25
5.3 上位机与下位机的通讯………………………………………………………………25
6 总结…………………………………………………………………………………………..26
致谢………………………………………………………………………………………….........27
参考文献…………………………………………………………………………………………28
