ID 310001

Generation of low pass filter coefficients with given parameters not possible.

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.

For axis-specific distance control:

• Filter type P-AXIS-00782
• Order of the filter P-AXIS-00507
• Filter cut-off frequency P-AXIS-00508

For 3D distance control:

• Filter type P-CHAN-00825
• Order of the filter P-CHAN-00816
• Filter cut-off frequency P-CHAN-00817

Or, the low-pass filter can be programmed in the NC program for axis-specific and 3D distance control.

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 Axis parameters of the axis affected, parameter is only output for axis-specific distance control.

%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-pass filter

%5:

Current value [µs]

Cycle time of GEO task

Error type

-