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wangkeming
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樓主  發(fā)表于: 2011-07-15 02:08
小弟學(xué)習三菱PLC也有段時(shí)間了。但是上升沿和下升沿到底怎么理解還是不夠透徹。特別是在運用上不知道是在什么場(chǎng)合用上升沿還是下升沿。我真的很頭疼啊。不知道你們有什么好的理解嗎？謝謝了。
qiangqiang
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1樓  發(fā)表于: 2011-11-03 20:53
可以理解為如光電開(kāi)關(guān)檢測時(shí)，需要響應快的場(chǎng)合

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