Cause : Over slip warning comes when the motor speed has deviated from the programmed speed limit by a certain amount for a specific duration. This fault indicate the motor speed has reached the programmed speed limit set in the drive.

The oSL warning in Delta drive indicates a Speed Limit Reached. This means the motor speed has reached the programmed speed limit set in the drive.

1. Check the motor parameter.
2. Check the parameter settings for oSL protection.