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liujianbo818
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樓主  發(fā)表于: 2009-03-07 21:50
臺達PLC做通訊，型號是DVP-32ES和歐瑞F-1000G變頻器通訊，支持MODBUS協(xié)議，我用MODWR指令寫(xiě)入變頻器地址H2000讓變頻器啟動(dòng)，PLC通訊上變頻器了，變頻器能夠運行，我用手動(dòng)操作變頻器面板讓變頻器停車(chē)，這時(shí)我把PLC上的B接線(xiàn)拆了，變頻器啟動(dòng)了。這是怎么回事？

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