ACS800 480VAC 500HP Motor - Faulting on OverFreq (7123) for no reason
Belt conveyor application, using DTC control mode, Parameter 20.01 set at 0 RPM and 20.02 set at 2000 RPM.
Motor running at 1695 RPM, constant speed and trends show no speed changes when it faults on OVERFREQ (7123).
Drive has been replaced as well as RDCU module.
Is it your belt conveyor running downside? In case yes, it most probably needs brake chopper and resistors. From the manual:
Check adequacy of motor braking torque.
Check applicability of torque control.
Check need for a brake chopper and
During operation, check:
01.07 DC BUS VOLTAGE V
Kstoilov is right, in addition to what has already just been indicated, how long has the drive been working with the parameters you've indicated?
If the drive was working for a long time but the failure appeared, you can not rule out any other kind of internal drive problem, for example in the capacitors, the effect of which could be a 7123 failure. You replaced it with the same drive and with the same parameters?