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valentine_xu
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樓主  發(fā)表于: 2018-12-06 21:13
我用三菱3u plc左邊帶一個(gè)3u-cnv-bd和fx3u485adp-mb.用通道一和三菱d700變頻器通訊，無(wú)法連接，用通道2也不行，rd和sd指示燈不亮。我把3u-cnv bd換成3u 485 bd和485adp mb，用通道2，正常。為什么，所有模塊都是新的，是不是fx3u plc用485adp mb必須用通道2，求解
source08
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1樓  發(fā)表于: 2018-12-10 17:22
RS485-BD模塊是需要用無(wú)協(xié)議通信方式才可以，不支持RTU通信方式。
source08
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2樓  發(fā)表于: 2018-12-10 17:27
你需要用FX3U-485ADP
樓主留言：
我用了485 adp mb用通道一通訊不上，加了一個(gè)485 bd 才用通道2通訊上，還是用mb模塊，485 bd沒(méi)接線(xiàn)

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