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樓主  發(fā)表于: 2011-07-19 09:51
初次使用 WinCC，下位機是S7200+243 (以太網(wǎng)模塊)，上位機軟件是 PCAccess + WinCC。
現在發(fā)現經(jīng)常會(huì )通訊中斷，只有重新啟動(dòng)計算機才能恢復。
而通訊中斷時(shí)，ping 這個(gè)設備卻沒(méi)有問(wèn)題，可以推定硬件線(xiàn)路沒(méi)有接觸不良的問(wèn)題。

那么是什么原因導致通訊中斷呢？

問(wèn)題一，在以太網(wǎng)向導中，該不該為數據塊生成 CRC 保護？現在是生成的。
問(wèn)題二，PCAccess是不是有什么沒(méi)有設置好的地方，會(huì )導致通訊中斷 ？
問(wèn)題三，WinCC除了I/O點(diǎn)數的授權之外，是不是還有什么授權沒(méi)有做好？

請各位大蝦賜予指導。

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