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刁民休想害朕
級別: 實(shí)習會(huì )員
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樓主  發(fā)表于: 2018-03-27 10:23
算上中繼器和擴展的3個(gè)通訊模塊，最多能與多少臺變頻器通訊，求大神老師告知
michael.guan
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1樓  發(fā)表于: 2018-03-30 15:16
Modbus RTU的話(huà)，31個(gè)站；Modbus TCP的話(huà)，127個(gè)站。
當然，如果使用RTU的話(huà)，站數多了之后，會(huì )大大降低輪詢(xún)速度，會(huì )影響到PLC與變頻器之間的實(shí)時(shí)響應。

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