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樓主  發(fā)表于: 2011-03-22 13:02
怎么實(shí)現西門(mén)子S7-200的50秒倒計時(shí)，并且顯示在2個(gè)7段數碼管上？

從50開(kāi)始計時(shí)到0秒，。

從打開(kāi)燈開(kāi)始計時(shí)，數碼管顯示，50秒倒計時(shí)，到0燈熄滅。

請問(wèn)該怎么做？

大蝦幫忙寫(xiě)下程序，最好使用梯形圖，我是初學(xué)者....

謝謝...
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1樓  發(fā)表于: 2011-03-22 13:53
怎么沒(méi)有人��？
龐樹(shù)恒
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2樓  發(fā)表于: 2011-03-22 19:39
數碼管顯示這個(gè)直接用PLC驅動(dòng)的話(huà)太占IO口了吧

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