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酷酷數碼
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樓主  發(fā)表于: 2023-06-08 16:44
求助，現場(chǎng)有個(gè)LG的K120S的14點(diǎn)的PLC，跟兩個(gè)變頻器485輪詢(xún)通訊，參考人機程序寫(xiě)的，輪詢(xún)12個(gè)的時(shí)候，可以正常通訊，但是后來(lái)加了點(diǎn)程序，結果就是輪詢(xún)的前幾個(gè)讀寫(xiě)不到數據，好像是第4個(gè)以后還可以通訊，求指導，謝謝

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