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良藝工控
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樓主  發(fā)表于: 2015-04-01 08:04
現在都用PLC編程了,突然接到一個(gè)繼電器的問(wèn)題,競然搞了兩三天,沒(méi)搞好,這個(gè)可不是想像中的簡(jiǎn)單.
原控制是:KM動(dòng)作使開(kāi)閘機構轉半圈到SQ1開(kāi)限位,實(shí)現開(kāi)閘,KM再動(dòng)作一次使開(kāi)閘機構再轉半圈到SQ2關(guān)限位,實(shí)現關(guān)閘。
[attachment=133519]
現在要改為:用電磁閥控制氣缸來(lái)實(shí)現開(kāi)關(guān)閘,電磁閥得電開(kāi)閘,電磁閥失電關(guān)閘。因無(wú)法更改PLC程序,用外部加接繼電器的方式來(lái)實(shí)現這個(gè)功能。
最基本的要求用元件最少,動(dòng)作可靠.
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小小蝸牛
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1樓  發(fā)表于: 2015-04-01 10:03
下面這個(gè)圖能供參考。
[attachment=133525]

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