警告不要在要求精确测上总时间的应用软件中使用定时触点。这些类型的应用软件首选计时器,时基子程序和PID块。CPU基于–个自由运行的定时器更新定时触点基准,该计时器与CPU扫描开始没有关系。如果扫描时间与定时触点时钟保持同相
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