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樓主  發(fā)表于: 2009-07-01 21:46
SC-9編程線(xiàn)兩邊的借口是什么樣的？它屬于RS485還是RS422?
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1樓  發(fā)表于: 2009-07-01 22:02
9針的是rs232，源頭是rs485
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2樓  發(fā)表于: 2009-07-04 22:56
等待，上次搞忘記了，plc街頭的是rs422

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