how does the "pid control input filter" know the frequency of the input data? What's the difference between "Butterworth Filter" and "PID Control Input Filter"

Hi all,

I am using low pass filters in my PID control. I found I have 2 choice, one is the "Butterworth Filter " and the other is "PID Control Input Filter". For "Butterworth Filter", I need to clearly define the frequency of the input data. However, the "PID Control Input Filter" does not need information of frequency. How does it know the frequency? They can give similar results and "PID Control Input Filter" seems give results closer to the real signal. What's the difference between them? How to use them correctly?

Thanks

best