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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
金海洋
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發(fā)帖數量: 330 個(gè)
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1樓  發(fā)表于: 2022-11-07 11:04
485中繼器是不是不能用于smart200的modbus  rtu通訊的擴展,要用1200才行
金海洋
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發(fā)帖數量: 330 個(gè)
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2樓  發(fā)表于: 2022-11-10 07:29
西門(mén)子官方客服答復:用PLC帶的通訊口和SB COM板,各帶31個(gè)點(diǎn),數量用增加中繼器解決,距離五十米,實(shí)際上100米是沒(méi)有問(wèn)題的,距離也可以用中繼器解決,3000米內沒(méi)有問(wèn)題,使用第三方設備

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