# ID 70458

Low-pass filter coefficients generated not possible with specified parameters.
Description | With distance control (see FCT-M3), a low-pass filter was parameterised to smooth the measured distance values. However, no valid filter can be created with the given filter parameters.
Response | Class | 7 | Controlled halt of the axis, the control loop is closed.
Solution | Class | 6 | Check filter cut-off frequency. It must be less than 0.5 / GEO cycle time (Nyquist theorem). Try to reduce the filter order.
Parameter | %1: | Logical axis number [-]
Logical axis number P-AXIS-00016 of concerned axis
%2: | Current value [-]
Return value of filter generation
%3: | Current value [-]
Filter order of low pass filter
%4: | Current value [Hz]
Characteristic frequency of low pas filter
%5: | Current value [µs]
Cycle time of GEO task
Error type | 11, Error message from position controller.