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xd126
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樓主  發(fā)表于: 2013-02-24 16:45
題目是這樣的，新建FC1在FC1中寫(xiě)一個(gè)計數器，結果放在DB1.DBW1中，脈沖地址不用管，數值能在觸摸屏上顯示出來(lái)，并且做個(gè)按鍵能夠清零。
這個(gè)該怎么寫(xiě)？ 我知道是用S_CUD這個(gè)指令。但是數值從CV出來(lái)后，是16進(jìn)制，怎么在觸摸屏中用十進(jìn)制顯示出來(lái)？請高手解答。。
還有題目:
1:西門(mén)子S7_200和S7_300的程序在不清除PLC內的數據的情況下上傳和下載？
怎樣比較S7_200和S7_300中的原程序和電腦中的程序。
就這些。望高手解答·

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