Allen Bradley PowerFlex 70, PowerFlex 700, PowerFlex 700L & PowerFlex 700S Drive
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Mar 11, 2024 12:41 pm
Cause : DC Bus Overvolt comes when bus voltage has exceeded 815V dc in 400volt class drives or 405V dc for 200 volt class drives.
1. Verify the AC Line.
2. Verify that either Par 414 [Brake/Bus Cnfg], the brake or bus regulator is enabled.
3. Verify that Par 128 [Regen Power Lim] is set properly.
4. If Par 414, bit 0 [Brake Enable] is set, verify braking resistor is properly sized.
