Speed filter time

  • Menu: 4.9.14-10.19-1
  • Index: 8713.3[0]

Description

The parameter is displayed if the following conditions are met:

  • The encoder uses one of the following interfaces for data transmission: sine/cosine, HIPERFACE®, RS485, SSI or SSI combi
  • The encoder is used to determine the speed/acceleration.

Time interval for determining the average speed from the encoder signal.

The filter time is used to compensate for physical fluctuations in the speed, or to reduce quantization errors of the evaluation method.

The filter time has an impact on the response time of the speed functions (safety sub-functions SSx, SLS, SSM, SSR) and must be taken into account in the safety assessment.

The default value of the filter time is 1 ms.

SEW‑EURODRIVE recommends setting the filter times as follows:

  • To 10 ms for the AK0H encoder
  • To 5 to 10 times the update time for an SSI encoder