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張榮熙
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樓主  發(fā)表于: 2009-07-21 19:50
本人覺(jué)得這個(gè)不是步進(jìn)圖!但是如果仿真是強制接通M4為什么又可以從上而下一步一步運行呢?還有為什么時(shí)間繼電器為什么會(huì )周期性的接通呢;請大家幫我解答一下
附件: 利用s做順控.rar (12 K) 下載次數:47
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草原牧人
學(xué)必真,行必果……
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1樓  發(fā)表于: 2009-07-21 21:47
根據樓主的步進(jìn)梯形圖沒(méi)有設置初始化啟動(dòng),當你模擬時(shí)把M4強制接通置位了S100,些時(shí)程序被初始化,正好你初始化后的程序步用了M8000常閉,當T0啟動(dòng)后整個(gè)步進(jìn)程序就被激活了,由于T2的作用又使程序能夠循環(huán)動(dòng)作。

  以上是本人的粗略分析,有不對的地方請見(jiàn)諒。

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