# ID 50557

Characteristic filter frequency greater than half the sampling rate.
Description | According to the sampling theorem according to Shannon, the maximum cut-off frequency may be (½*TA = cycle time of the NC controller). The cut-off frequency of the PT1 filter is calculated from the time constant as follows: fg = 1 / (2 * PI * P-AXIS-00357). The cut-off frequency of all other filters is specified directly in the parameter P-AXIS-00067.

Possible solutions:

Reduce cut-off frequency P-AXIS-00067. Increase the time constant P-AXIS-00357 for PT1-filters.

Reduce the cycle time of the numerical control

See [FCT-A7// Section: PT1-filter]

Response | Class | 3 | The filter is deactivated.
Solution | Class | 7 | Reduce cut-off frequency P-AXIS-00067 or increase time constant P-AXIS-00357
Parameter | %1: |
Logical axis number P-AXIS-00016 of concerned axis
%2: |
Number of concerned filter
%3: |
Filter typer P-AXIS-00204
%4: |
Current characteristic frequency of a filter P-AXIS-00067
%5: |
Sampler frequency of the controller (1 / TA)
Error type | -