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wsjlfyy
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樓主  發(fā)表于: 2009-02-21 21:30
各位請教一個(gè)棘手問(wèn)題:例如:FB的背景數據塊DB,DB里面的內容是自動(dòng)生成的嘛??在DB里面的第一列地址有什么意義?總的符號表里面的名稱(chēng)如:Flow_switch_1  地址I0.3  在DB里面也有,當I0.3通,則DB里面的Flow_switch_1也通!他們存在怎么樣的聯(lián)系??就是什么關(guān)系?? 拜托!
bhqt
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1樓  發(fā)表于: 2009-02-21 23:46
是自動(dòng)生成的。你說(shuō)的那個(gè)不是背景數據塊里的,是自己從上面的臨時(shí)變量列表里面定義的
從明天起,做個(gè)幸福的人,騎馬劈柴周游世界;
從明天起,關(guān)心糧食和蔬菜,有一所房子,面朝大海,春暖花開(kāi)

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