Cause : Over speed comes when motor speed has exceeded the motor overspeed level (31.200 Motor overspeed level), and the delay defined with parameter 31.201 Motor overspeed level delay has elapsed.

D104 warning in ABB ACS880 drive indicate over speed warning when motor speed has exceeded the motor overspeed level.

1. Check the torque and current limit settings.
2. Check the motor and motor cables.
3. Check pulse encoder connections, if used.