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wangfuwang
下崗農民
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樓主  發(fā)表于: 2014-11-12 18:28
用一個(gè)檢測開(kāi)關(guān)，可以檢測流水線(xiàn)的運動(dòng)物品嗎，高手幫我看看這這路，那里需要改進(jìn)。付上工藝程圖與電路圖
懂一點(diǎn)點(diǎn)
好好學(xué)習，GO  GO
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1樓  發(fā)表于: 2014-11-15 18:00
近接開(kāi)關(guān)的常閉點(diǎn)串接到時(shí)間繼電器線(xiàn)圈中，沒(méi)有物體接近，時(shí)間繼電器開(kāi)始計數，當時(shí)間繼電器大于設定時(shí)間后，置位報警，小于設定時(shí)間復位就可以了

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