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zhulou507
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樓主  發(fā)表于: 2012-10-11 17:14
本人在用三菱的RS-485在與設備通訊時(shí)遇到一個(gè)問(wèn)題，當對方設備是開(kāi)啟狀態(tài)時(shí)通訊一切正常，但是當設備停止一兩天后，通訊就終止了。需要對通訊卡進(jìn)行重啟后，才可重復通訊！請教大俠們，問(wèn)題出在哪里？
天使之心
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1樓  發(fā)表于: 2012-10-13 14:19
應該是PLC程序里面有一段一開(kāi)始對設備復位或者激活的程序，PLC收到設備的應答后才能通訊。

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