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新人來(lái)襲
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樓主  發(fā)表于: 2018-09-07 10:32
圖片:
不知道為什么按下沒(méi)有,根據掃描周期,第一次按下按鍵觸發(fā)第一上升沿啟動(dòng),第二次按下按鍵再觸發(fā)上升沿關(guān)閉。但是實(shí)際上確是按下后沒(méi)反應,不啟動(dòng)。求大神指點(diǎn)一下,下面哪里不是短接,而是還有其他按鍵,用來(lái)復位用的。
[ 此帖被新人來(lái)襲在2018-09-07 15:15重新編輯 ]
澤西1968
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1樓  發(fā)表于: 2018-09-07 15:19
樓主沒(méi)有理解SET指令的特征,此例子中SET M0后,M0的常開(kāi)點(diǎn)在接下來(lái)的掃描過(guò)程中即時(shí)導通,也就是例子中35步的程序,此時(shí)啟動(dòng)按鈕的掃描週期內M0常開(kāi)點(diǎn)也導通了,造成M0剛置位,掃描到35步程序時(shí)馬上又復位了,所以油泵沒(méi)啟動(dòng)。
5樓的程序為正解!

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