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陳晨別夢(mèng)
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樓主  發(fā)表于: 2017-09-07 14:55
比如PLC控制電機正反轉時(shí)候的硬件互鎖
jeffwang2011
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1樓  發(fā)表于: 2017-09-07 15:42
一個(gè)接觸器的線(xiàn)圈供電串聯(lián)另一個(gè)接觸器的常閉點(diǎn)。
這樣當一個(gè)接觸器接通時(shí)，另一個(gè)接觸器一定是斷開(kāi)的。
當然，當一個(gè)接觸器的接觸點(diǎn)粘連時(shí)還是會(huì )出問(wèn)題，我見(jiàn)過(guò)的還有檢測觸點(diǎn)粘連的電路。

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