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taotaoba
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樓主  發(fā)表于: 2014-12-25 13:04
各位大俠：你們plc外部輸入的急停和停止按鈕都是使用常開(kāi)還是常閉。我一直使用常閉點(diǎn)。昨天參加技師口試，監考老師說(shuō)我把他們以前的教學(xué)顛覆了。估計掛了。上圖
楊作峰
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1樓  發(fā)表于: 2014-12-26 12:28
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