# ID 70421

Filter design with given parameters not possible.
Description | It is not possible to design a stable filter for all filter parameters, e.g. due to the limited calculation accuracy.
Response | Class | 7 | Filter is deactivated
Solution | Class | 6 | Change parameterisation:

- Vary the filter time constant P-AXIS-00438 of the PT2 filter.
- Change the cycle time of the controller

Parameter | %1: | Logical axis number [-]
Logical axis number P-AXIS-00016 of concerned axis
%2: | Current value [-]
Number of concerned filter
%3: | Current value [-]
Type of filter (see axis filter FCT-A7)
%4: | Current value [-]
Order of the filter (see axis filter FCT-A7)
%5: | Current value [-]
Time constant of the PT2 filter (see P-AXIS-00438)
Error type | -