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tongyefei
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樓主  發(fā)表于: 2013-06-24 12:37
請教下各位,西門(mén)子S7300的模擬量輸入模塊AI8點(diǎn)的331-7KF02-0AB0  我前6個(gè)通道是2線(xiàn)制4到20毫安,后2個(gè)通道是用4線(xiàn)制4到20毫安信號。已經(jīng)把10、11及4線(xiàn)制的2個(gè)通道的負極和20短接,但是最后兩個(gè)4顯示通道還是顯示最大值?怎么回事?輸入的信號量過(guò)說(shuō)正常的
beichen
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1樓  發(fā)表于: 2013-06-24 15:06
檢查下量程卡的設置,檢查下開(kāi)關(guān)電源的負極跟隔離器的負極有沒(méi)有短接了?
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