HIMA F7133 对设定值的变化做出响应
大多数商业控制系统都提供选择权比例动作也仅仅基于过程变量。这意味着只有积分动作对设定值的变化做出响应。对算法的修改不影响控制器响应过程扰动的方式。基于PV的比例动作消除了由设定值的突然变化引起的瞬时和可能非常大的输出变化。根据过程和调整，这可能有利于对设定点阶跃的响应。
在现实世界中，这是数模转换的并在控制下作为操纵变量(MV)传递到过程中。当前误差被存储在别处，以便在下一次微分中再次使用，然后程序等待，直到从开始起已经过去了dt秒，并且循环再次开始，读入PV和设定点的新值以及计算误差的新值。[40]
请注意，对于实际代码，“wait(dt)”的使用可能不合适，因为它没有考虑算法本身在循环期间所花费的时间，或者更重要的是，任何延迟算法的抢占。
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