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王小林0311
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樓主  發(fā)表于: 2016-05-11 20:31
本人在用FX3G的PLC和FX3G-485-BD在做與外部設備通訊時(shí)出現這樣的問(wèn)題。
參數設定,程序都正確。
PLC向外部發(fā)送的數據應該為CC 33 01 04 04 00。
可是有的時(shí)候數據會(huì )發(fā)送一下子亂掉,原本應該發(fā)送的數據CC 33 01 04 04 00.會(huì )變成如下CC 33 01 04 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 23 00 00 00 18 00 10 00 00 00 00 02 00 00 00 10 E0 00 40 00 00 08 00 00 6E 27 00 01 00 24 81 C0 00 7C 00 00 00 69 A0 08 D1 18 63 EC 00 21 E0 E0 20 E0 80 70 81 13 E0 BF E0 FE E0 08 E0 F0 E0 E8 F3 38 E0 F0 FE FF FC FC 2E E0 E7 F1 FE FE E5 FE E8 F2 FF E0 FF E8 EB E7 BF FF FF F8 FF F0 FF FF FF F8 FC FF FF FF FC FF FF 。
請問(wèn)這是什么原因?
287496855
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1樓  發(fā)表于: 2016-08-30 16:28
可以把3GCRC的校驗程序發(fā)我看看么?我最近用3G的,也會(huì )出現有時(shí)候通訊不上,我不知道校驗錯哪了,我從0寫(xiě)到9999有100個(gè)左右寫(xiě)不進(jìn)去,3U的也一樣,應該是校驗錯誤了

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