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yuxilu
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樓主  發(fā)表于: 2019-10-11 17:08
現有客戶(hù)使用的國產(chǎn)智能電量?jì)x表4塊，使用的MODBUS與組態(tài)王通訊，每次只要發(fā)生斷電情況，4塊電量?jì)x表就會(huì )有1、2個(gè)燒損，輕的通訊無(wú)輸出，嚴重情況整個(gè)儀表?yè)p壞無(wú)顯示。同樣的儀表在別的電氣盤(pán)里沒(méi)有接通訊就沒(méi)事，燒的經(jīng)常是接了通訊輸出的，不知道是什么情況，
sjbandmm
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1樓  發(fā)表于: 2019-10-11 22:31
485通訊線(xiàn)是不是沒(méi)屏蔽，或屏蔽接地不良。如果還不行可以考慮增加通訊隔離器。

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