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dkxj213
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樓主  發(fā)表于: 2012-06-26 09:17
    PLC 數字量可以從輸入點(diǎn)的燈很容易知道,是否有輸入。但是模擬量應該怎么檢測呢? 誰(shuí)有簡(jiǎn)直觀(guān)的方法介紹下?
   昨天有個(gè)溫度沒(méi)顯示,檢查半天也沒(méi)搞明白怎么回事,在檢測點(diǎn)量了有21V左右的電壓。封線(xiàn)顯示變星說(shuō)明線(xiàn)路應該是好的吧,換了個(gè)油顯示的測溫頭到這里還是沒(méi)顯示。直接接到配電柜還是沒(méi)顯示。感覺(jué)到處都是好的就是沒(méi)溫度顯示。迷糊了。
    順便說(shuō)說(shuō) 輸出的該怎么檢查!
萬(wàn)分感謝了。
絕世精靈
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1樓  發(fā)表于: 2012-06-26 09:22
不理解你說(shuō)的這個(gè)沒(méi)顯示是哪里沒(méi)顯示,是溫控器沒(méi)顯示,還是觸摸屏沒(méi)顯示

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