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建控電
野蠻其體魄、文明其精神!
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樓主  發(fā)表于: 2015-04-27 11:31
最上面是兩個(gè)PLC主從站422通訊,中間是三個(gè)PLC主從站422通訊,最下面是三個(gè)PLC主從站485通訊,請大神們看一下有沒(méi)有問(wèn)題?

3個(gè)PLC主從站通訊時(shí),中間兩個(gè)PLC的通訊擴展口,任選其中的一個(gè),短接連接嗎?

因為之前沒(méi)用過(guò)三個(gè)PLC通訊,請求確認一下!謝謝!
ldbboy
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1樓  發(fā)表于: 2015-05-02 11:42
我也想采有四線(xiàn)制!和二線(xiàn)制!不知道哪個(gè)好一點(diǎn)!

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