PROSOFT模塊MVI71-ADM
PROSOFT模塊MVI71-ADM
PROSOFT模塊MVI71-ADM
利用以上程序觀察并認(rèn)識程序的掃描周期和執(zhí)行過程。
(1)調(diào)整編碼器的頻率至1KHZ。按下開關(guān)SB1,這時(shí),程序中的定時(shí)器開始計(jì)時(shí),而X0的上升沿使計(jì)數(shù)器的初始值復(fù)位,當(dāng)前值為0。計(jì)數(shù)器重新開始計(jì)輸入的脈沖數(shù)。1s鐘后,定時(shí)時(shí)間到,計(jì)數(shù)停止。觀察此時(shí)的計(jì)數(shù)器當(dāng)前值。從表面看,當(dāng)前值應(yīng)在1000左右
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