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fqauto
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樓主  發(fā)表于: 2014-11-25 18:14
QJ71C24N MODUBS通迅，發(fā)送沒(méi)問(wèn)題，讀取故障，上圖，不知是哪里的問(wèn)題，我突然覺(jué)得是接收的長(cháng)度問(wèn)題，要是接收數據長(cháng)度在哪里改呢？

補：因為用06寫(xiě)指令接收的數據數是固定長(cháng)度，所以沒(méi)問(wèn)題！ 而用03讀指令，可以讀多位，數據長(cháng)度可以變化，不知是不是這里有問(wèn)題。因為我把D12 存儲數據長(cháng)度的字改成K1也沒(méi)用！
ymmfa
不想大江大河，不想浪起潮落，只愿一灣小湖，靜待歲月安好。
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1樓  發(fā)表于: 2014-11-25 21:17
先恭喜樓主解決問(wèn)題！
請教下樓主怎么設置的？
我用GX WORKS2里設置QJ71C24N，沒(méi)找到有MODBUS
[attachment=129098]
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