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wangsai0501
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樓主  發(fā)表于: 2022-01-06 10:48
圖片：
請教各位大師，用wincc7.5與PLC通訊后，想讀取PLC溫度模塊數值，wincc畫(huà)面添加了Wincc  Online TrendControl控件，組態(tài)后，畫(huà)面可以顯示溫度的實(shí)時(shí)變化曲線(xiàn)。
1：如果切換至別的畫(huà)面再返回此畫(huà)面，之前的曲線(xiàn)（比如之前顯了滿(mǎn)屏）沒(méi)有了，會(huì )重新從最右邊開(kāi)始出現，之前的就沒(méi)有了怎么回事？
2：在運行過(guò)程中的數值如何自動(dòng)存到電腦里，以便查看？
3：故障報警控件如何自動(dòng)保存從經(jīng)發(fā)聲過(guò)的報警？

  感性各位大師指導下
michael185
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1樓  發(fā)表于: 2022-01-06 11:59
不直接顯示變量
把變量歸檔
顯示歸檔的變量

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