ID 50557

Characteristic filter frequency greater than half the sampling rate.

Description

According to Shannon's sampling theorem, the maximum cut-off frequency is (½*T_A= 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 NC controller

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

Response

Class

3

The filter is deactivated.

Solution

Class

7

Reduce the cut-off frequency P-AXIS-00067 or increase the time constant P-AXIS-00357

Parameter

%1:

Logical axis number P-AXIS-00016 of axis affected

%2:

Number of filter affected

%3:

Filter type P-AXIS-00204

%4:

Current filter cut-off frequency P-AXIS-00067

%5:

Sampling frequency of the controller (1 / T_A)

Error type

-