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liujianbo818
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樓主  發(fā)表于: 2009-03-18 21:02
我想問(wèn)一下,S7-200 CPU224XP CN 與變頻器通信（歐瑞），變頻器支持MODBUS  ---RTU模式。問(wèn)下接線(xiàn)。PLC是485九針插口，變頻器2線(xiàn)制A和B，還是直接A接8，B接3，還是另外加個(gè)東西？
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    1樓  發(fā)表于: 2009-03-21 12:39
    樓主你懂不懂��？唉

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