Search FAQs

What is the difference between the pre-ramp frequency reference and the frequency reference on the ATV630 and ATV930 drives?

Issue:
Difference between "pre-ramp" and frequency reference process drives.

Product Line:
Altivar ATV630 and ATV930 drives

Environment:
All

Cause:
HMI will display both which one means what one is HMI freq ref and the other is normal freq ref.

Resolution:

[Pre-Ramp Ref Freq] FrH
Frequency reference before ramp (signed value).
Actual frequency reference linked to the motor regardless of which reference channel has been selected.
This parameter is in read-only mode

VS

Ref Frequency] LFr
Reference frequency.
This parameter only appears if the function has been activated. It is used to change the speed reference
from the remote control. OK does not have to be pressed to activate a change of reference.