0x2022 Position Feedback Filter

The measured position signal from the sensor can be filtered. There are three different types of filtering between which the user can choose:

  • 1st order low pass filter with formula G(s)=1/(1+sT), where T=1/(2*pi*f)
  • 2nd order low pass Butterworth filter
  • 3rd order low pass Butterworth filter

Filters are implemented in a discrete domain using Euler's forward difference discretization method, i.e. s=1/T*(1-z^-1).

The filter can be used by setting the filter type parameter to 1,2 or 3 (depending on the order of the filter). Value 0 disables the filter. Parameter cutoff frequency is set in [Hz].

Name Index:Sub Type Bit Size Options Unit Access PDO Mapping
Type 0x2022:1 USINT 8
Disabled 0
1st order low pass 1
2nd order low pass Butterworth 2
3rd order low pass Butterworth 3
readwrite
Name Index:Sub Type Bit Size Min Data Max Data Default Data Unit Access PDO Mapping
Cutoff Frequency 0x2022:2 UDINT 32 0 Hz readwrite