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金海洋
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樓主  發(fā)表于: 2022-11-06 07:47
使用smartST40 PLC，共有100臺流量計，如何用485通訊方式進(jìn)行數據讀取， 用485集線(xiàn)器是否可以實(shí)現全部通訊，怎么連接最經(jīng)濟適用
wwcwwc
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1樓  發(fā)表于: 2022-11-07 10:41
根據官方說(shuō)明，一個(gè)通訊口最多允許連接31個(gè)從站，如果你添加了擴展信號板，那么，一個(gè)plc也只能是62個(gè)儀表的連接。
集線(xiàn)器只能說(shuō)是對實(shí)際硬件連接的容易性提供了一點(diǎn)幫助，對plc讀取從站信息沒(méi)有擴展作用。

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