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wangchangxi
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樓主  發(fā)表于: 2014-08-28 09:28
PLC是Smart系列-CR40，溫控器是Hongeywell-DC1040CT-30100B-E。
溫控器通訊協(xié)議是：波特率：9600，停止位：1，校驗：奇校驗，數據程度：1；
PV（顯示值）寄存器地址：H8A,       SP（設置值）寄存地址：H0；

問(wèn)題是兩者間進(jìn)行RS485-Modbus-RTU通訊，PLC如何對溫控器PV值和SP值進(jìn)行讀取和寫(xiě)入。
請老師指導。謝謝
[ 此帖被wangchangxi在2014-08-28 09:37重新編輯 ]
wangchangxi
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1樓  發(fā)表于: 2014-08-28 11:21
主要是不知道怎么把H8A和H0 這兩個(gè)地址寫(xiě)到PLC程序里，
進(jìn)來(lái)看的都給點(diǎn)建議好嗎？

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