Corrected from:
Inverter Drives 8400 StateLine, HighLine, and TopLine from firmware version 14.00.00.00
Response of the new version?
Calculation error has been corrected.
Which products are affected?
Inverter Drives 8400 StateLine, HighLine, and TopLine with a firmware version lower than 14.00.00.00
What happens?
The speed accuracy is reduced and the motor may oscillate.
When does the problem occur?
If C059>650Hz and in VFC control mode, the C021 slip compensation is too high by the factor 2. Furthermore there is a calculation overflow in the slip calculation if fdist > 650Hz and in VFC control mode.
Short-term measures/recommendations?
Switch off slip compensation (C021=0)
Evaluation:
If a high speed accuracy at fd>650Hz is required, an FW update to 14.00.00.00 should be carried out.
