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作者：祝征圣，曲勇（青島城投雙元水務(wù)有限公司，山東 青島 266071）

李鳳（青島海泊河污水處理廠，山東 青島 266071）

摘要：在污水處理廠內(nèi)，各種污水處理儀表分布較分散，而在儀表信號(hào)傳輸過(guò)程中，因受到現(xiàn)場(chǎng)環(huán)境與其他限制條件，使用通訊電纜作為通訊介質(zhì)進(jìn)行傳輸時(shí)，受現(xiàn)場(chǎng)條件限制，存在布線困難，傳輸距離長(zhǎng)，投資大，成本較高。無(wú)線電數(shù)字通信技術(shù)，特別是中短距離的傳輸技術(shù)及硬件產(chǎn)品目前已較為成熟，本文介紹在污水處理廠將部分非智能儀表信號(hào)（4~20mA）與智能儀表信號(hào)（ModbusRTU協(xié)議）通過(guò)無(wú)線電技術(shù)將信號(hào)遠(yuǎn)傳至PLC并最終將儀表數(shù)據(jù)顯示在工業(yè)監(jiān)控畫(huà)面（FactoryTalkSE）。

關(guān)鍵詞：無(wú)線電子技術(shù)；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

在線預(yù)覽：無(wú)線傳輸技術(shù)在污水處理廠監(jiān)控系統(tǒng)中的應(yīng)用

摘自《自動(dòng)化博覽》2019年7月刊