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為修修為
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樓主  發(fā)表于: 2022-10-27 22:26
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編寫(xiě)了一個(gè)設備運行累積時(shí)間的FB塊，多重背景數據。單獨建了一個(gè)掉電保持DB數據塊，來(lái)保存運行時(shí)間，程序可以實(shí)現多次調用并且有累積時(shí)間。但是拔掉電源后，在通電運行時(shí)間就清零了。掉電保持DB數據塊已經(jīng)勾選了保持。不知道哪里的問(wèn)題，請教大家。謝謝。
幽幽de幽幽
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1樓  發(fā)表于: 2022-10-28 09:09
FB塊輸出是否掉電保持？不然掉電重新上電會(huì )重新輸出給你的數據塊 這樣數據就變了

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