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一盤(pán)水果沙拉
越努力越幸運
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樓主  發(fā)表于: 2018-12-31 11:37
按一次按鈕X0,指示燈Y0亮，再按Y0滅，再按Y0亮，再按Y0滅，如此循環(huán)動(dòng)作。程序如下圖，第二次按X0為什么Y0會(huì )亮，M1常閉也斷開(kāi)了呀    
小小蝸牛
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1樓  發(fā)表于: 2018-12-31 14:19
PLS是上升沿的微分輸出，PLC掃描工作的每個(gè)周期是從上至下從左到右來(lái)掃描的。

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