在該例中,程序可包括首先用于子程序塊的小邏輯。子程序坎可隨程序的執(zhí)行多次調(diào)用。在一個程序中需要幾次重復執(zhí)行的邏輯操作可寫人子程序塊,通過調(diào)用子程序完成邏輯操作,用這種方法.可域少整個程序的長度。循環(huán)子程序340型或更高型CPU的4.2版本或更新的版本提供循環(huán)子程序–參看編程軟件用戶手冊GFK-0466中第三章第八節(jié)“子程序塊”。

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