只有第–次執(zhí)行實(shí)例會(huì)更新它的定時(shí)器。如果-個(gè)不同的實(shí)例接著被執(zhí)行,它的定時(shí)器值將保持不變。在一次邏輯掃描期間對(duì)一個(gè)功能塊的多次調(diào)用的情況下,只有第–次調(diào)用會(huì)向它的定時(shí)器功能塊增加總時(shí)間。這個(gè)動(dòng)作和在–個(gè)正常程序塊的定時(shí)器的動(dòng)作是匹配的。范例;-一個(gè)功能塊被定義為對(duì)一個(gè)定時(shí)器功能塊使用一一個(gè)成員變量。該功能塊的兩個(gè)實(shí)例timer.A和timer_ _B被建立。
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