Siemens SINUMERIK 840Di Manual page 424

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13 Drive Optimization using HMI Advanced

13.4 Frequency response measurement

Measurement:

Reference fre-

quency response

Fig. 13-2 Example: Measurement results of a reference frequency response measurement

Measurement:

Interference fre-

quency response

Reference and

interference

2. Set the required parameters in the measurement parameter screen.

3. Display of the measurement result on the screen with the soft key Display.

The reference frequency response measurement determines the transmission

response of the speed controller.

The response range should be as wide as possible and without resonance. It

may be necessary to install stop or low-pass filters. Particular care must be

taken to prevent resonance within the speed controller limit frequency range

(stability limit approx. 200–500Hz).

Alternatively, the interference frequency response can be recorded in order to

assess how well the control suppresses interference.

This parameter determines the height of the test signal amplitude. This should

give rise to only a very low speed of a few (approximately 1 to 2) revs/min at the

SINUMERIK 840Di Manual (HBI) – 06.03 Edition