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hwl666
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樓主  發(fā)表于: 2010-12-15 08:36
學(xué)了一段時(shí)間PLC,遇到了下面的問(wèn)題,突然疑惑了,感覺(jué)什么都不懂了,糾結。
如下圖接線(xiàn),程序里X1的常閉觸點(diǎn)
能夠使用嗎?

njaolian
新年快樂(lè ),恭祝大家出門(mén)撿錢(qián)包。凡是撿到錢(qián)包的,分我一半,哈哈
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1樓  發(fā)表于: 2010-12-15 08:48
里面常開(kāi),里面用常開(kāi)就是檢測外部信號,開(kāi)就開(kāi),關(guān)就關(guān)
里面常閉,里面用常開(kāi)就是檢測外部信號,開(kāi)就關(guān),關(guān)就開(kāi)

外面是接線(xiàn)用的,里面是用來(lái)檢測外部信號開(kāi)關(guān)條件的,別糾結了

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