只有第–次执行实例会更新它的定时器。如果-个不同的实例接着被执行,它的定时器值将保持不变。在一次逻辑扫描期间对一个功能块的多次调用的情况下,只有第–次调用会向它的定时器功能块增加总时间。这个动作和在–个正常程序块的定时器的动作是匹配的。范例;-一个功能块被定义为对一个定时器功能块使用一一个成员变量。该功能块的两个实例timer.A和timer_ _B被建立。
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