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cd_looper
好想放飛自我
級別: 工控俠客
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樓主  發(fā)表于: 2017-04-07 08:55
最近在測試一款電參數測試儀的時(shí)候，想要把電壓參數讀到PLC里面，因為儀器說(shuō)明書(shū)說(shuō)帶RTU功能，所以想用MODBUS寫(xiě)。但是根據說(shuō)明書(shū)上的地址，數據讀不出來(lái)。各位兄臺幫忙參考一下，是否是程序里有哪里寫(xiě)得不正確的地方，謝謝 儀表通訊參數
 初始化
 讀取A相電壓
 讀取B相電壓
 讀取C相電壓
    
Easy doesn't enter into grown-up life!!!
V:ZQL276438265
doublezhou
級別: 探索解密
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1樓  發(fā)表于: 2017-08-17 14:58
通選沒(méi)有問(wèn)題，但是你的是浮點(diǎn)數，你的格式是2143  ，但是西門(mén)子讀取的話(huà)是1234，所以個(gè)人覺(jué)得把每個(gè)字的兩個(gè)字節順序換一下，重組成1個(gè)新的浮點(diǎn)數，看與現實(shí)是否吻合

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