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

-