Overtorque Detection 1

What does OL3 mean?

The OL3 alarm indicates that the motor's current or torque has exceeded the programmed Overtorque Detection 1 Level (L6-02) for a duration longer than the Overtorque Detection 1 Time (L6-03). This suggests an excessive mechanical load or an obstruction in the driven equipment.

• Actual motor torque exceeding the Overtorque Detection 1 Level (L6-02) for a duration longer than Overtorque Detection 1 Time (L6-03).
• Mechanical jam, blockage, or sudden increase in load in the driven equipment.
• Overtorque Detection 1 Level (L6-02) set too low for normal operating transients of the application.
• Incorrect Overtorque Detection 1 Time (L6-03) set too short, causing nuisance trips on momentary load peaks.
• Loss or corruption of speed/position feedback in closed-loop control, causing the motor to over-exert.

Click steps to track your progress.

1. 1

   1. Verify Overtorque Detection 1 Level (L6-02) and Overtorque Detection 1 Time (L6-03) are appropriate for the application's normal load profile.

2. 2

   2. Inspect the driven machinery for any mechanical binding, obstructions, or excessive friction that would increase required torque.

3. 3

   3. Monitor motor current (e.g., Parameter C1-01) and torque feedback (if available) during operation to identify peaks and compare to L6-02.

4. 4

   4. Check the mechanical coupling between the motor and the load for damage, looseness, or misalignment.

5. 5

   5. If using vector control, verify integrity of encoder feedback signals (e.g., clean pulses on A/B/Z channels) to ensure accurate torque estimation.