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樓主  發(fā)表于: 2008-09-21 19:09
求：S7－300的硬件中斷做法？
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1樓  發(fā)表于: 2008-09-21 21:22
硬件中斷使用的是OB40~OB47，不過(guò)并不是所有的CPU都支持這么多OB塊，通常的CPU只支持OB40.

比如做一塊有中斷功能的數字量輸入模塊（支不支持，可以查看），在具體模塊的配置中，選中硬件中斷選項和哪些點(diǎn)觸發(fā)中斷；然后在OB40中編寫(xiě)相應的程序。
歡迎大家訪(fǎng)問(wèn)我的BLOG:  [URL]http://ye_w.plcjs.cn/[/URL]

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