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樓主  發(fā)表于: 2015-05-16 11:39
我做的一個(gè)水處理遠程控制改造項目，原來(lái)需要人工采樣數據來(lái)監測，每小時(shí)一次，但夜間人員經(jīng)常睡覺(jué)，致使水質(zhì)失控。甲方要求控制系統能實(shí)現遠程監控，自動(dòng)采用數據，并能隨時(shí)查詢(xún)和打印報表。由于質(zhì)管部距現場(chǎng)450米，因此決定采用FX2NPLC做下位控制，以組態(tài)王6.53做上位監控，用三菱FX系列具有的計算機鏈接協(xié)議發(fā)送信號，在PLC一次配置FX485ADP通訊適配器，在上位機一側配置FX485PLC-IF實(shí)現232/483信號轉換。反應水質(zhì)的電導率和PH值以4-20ma的模擬量信號送入PLC。
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