瑞恩 57C404C++瑞恩 57C404C

瑞恩 57C404C
瑞恩 57C404C
瑞恩 57C404C
由于ob1扫描周期不固定，所以结果很难预料。单说运行是可以的，但用OB35调用，可以有好的控制精度不是说非要作在OB35里,而是指从OB35调用主要是0B35以固定周期运行，数字化PID的采样周期T是等间隔的，所以要用定时中断来触发。PID在定时中断中执行是因为定时中断准确,是以设定的周期执行的,除非有更高优先级的中断同时发生.而主程序的执行周期不是定长的,在主程序中的定时器的精度也受扫描周期的影响.OB35中断周期：按所设定的时间间隔产生中断。即采样周期：   常指在周期性的采样系统中，当对一模拟量进行采样时，两次采样之间的时间间隔。

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