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案例频道作者：祝征圣，曲勇（青岛城投双元水务有限公司，山东 青岛 266071）
李凤（青岛海泊河污水处理厂，山东 青岛 266071）
摘要：在污水处理厂内，各种污水处理仪表分布较分散，而在仪表信号传输过程中，因受到现场环境与其他限制条件，使用通讯电缆作为通讯介质进行传输时，受现场条件限制，存在布线困难，传输距离长，投资大，成本较高。无线电数字通信技术，特别是中短距离的传输技术及硬件产品目前已较为成熟，本文介绍在污水处理厂将部分非智能仪表信号（4~20mA）与智能仪表信号（ModbusRTU协议）通过无线电技术将信号远传至PLC并最终将仪表数据显示在工业监控画面（FactoryTalkSE）。
关键词：无线电子技术；4~20mA；RS485；PLC；FactoryTalkSE
Abstract: In the sewage treatment plant, all kinds of sewage treatment instruments are distributed widely. However, in the process of instrument signal transmission, due to the site environment and other restrictions, the use of communication cable as a communication medium for transmission is limited by the site conditions, with wiring difficulties, long transmission distance, large investment and high cost. Wireless digital communication technology, especially in short distance transmission technology and hardware products are now relatively mature. In this paper, the non-intelligent instrument signal (4-20 ma) and the intelligent instrument signal (ModbusRTU protocol) by radio technology can be transmitted to PLC, and the instrument data can eventually be displayed in industrial monitoring (FactoryTalkSE).
Key words: Wireless electronic technology; 4~20 mA; RS485; PLC;FactoryTalkSE
在线预览：无线传输技术在污水处理厂监控系统中的应用
摘自《自动化博览》2019年7月刊
北京市公安局海淀分局备案号：11010802023656号