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lanjinghao
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樓主  發(fā)表于: 2009-05-23 11:35
   TP277-6和S7-200已建立好通訊。假設觸摸屏所有變量的采樣周期都為1s，在觸摸屏上設置一個(gè)按鈕，當按下這個(gè)按鈕時(shí)把M6.0置1，彈起這個(gè)按鈕M6.0置0.現在有幾個(gè)疑問(wèn)：
1、如果按下和彈起這個(gè)按鈕在一個(gè)采樣周期內完成，那么在PLC上M6.0的狀態(tài)是否會(huì )有變化？
2、假設操作按鈕不受采樣周期影響，那么PLC中M6.0為1的時(shí)間是否維持1s？
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