ATV630 not reaching reference frequency

[DZ_ENGD]

Hello everyone,

I'm facing an issue with a Schneider ATV630D45N4 variable frequency drive – it does not reach the reference frequency. Regardless of the frequency reference (e.g. 40 Hz), the drive never goes above 8 Hz.

We’ve tried controlling the drive via SoMove – Control Panel, but the result is the same: the output frequency remains limited to 8 Hz.

There are no active faults or warnings on the display. The motor starts and runs, but only up to 8 Hz, no matter what frequency we request.

My questions:
– Which parameters should I check that could be limiting the frequency?
– Could this be related to current, torque, or motor protection settings?
– Are there any known issues or default limits with the ATV630 series that could cause this behavior?

I added small video to message for ilustrating problem by the Control Panel functionality.

Any suggestions or experience with similar problems would be much appreciated. Thanks in advance!

[Bastian_Schmitz]

Hi,

The motor runs into the current limitation https://www.se.com/us/en/faqs/FA308900/ 

That is the reason why SOMOVE schow as state CLI.

Check your sizing or/and your motor parameter.

[BJacqz]

If I may add, please check the motor coupling as well as Bastian says ensure all motor parameters are really entered in the drive. Then make an autotuning and try again...