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whldyy1125
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樓主  發(fā)表于: 2015-11-28 16:13
S7-200中編寫(xiě)程序將進(jìn)行交換的數據存放在VB0-VB15,對應S7-300的PQB0-PQB7和PIB0-PIB7,注意：VB0-VB7是S7-300寫(xiě)到S7-200的數據，VB8-VB15是S7-300從S7-200讀取的值，EM277上撥位開(kāi)關(guān)的位置一定要和S7-300中組態(tài)的地址一致。

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