SW OverCurrent

What does F63 mean?

The software current trip limit, set in parameter A448 [SW Current Trip], has been exceeded. This indicates that the motor or load is drawing more current than the configured software limit, which can be a sign of mechanical overload or an improperly set current trip value. Persistent overcurrent can damage the motor or connected equipment.

• Actual motor current exceeds the software trip threshold set in parameter A448 (SW Current Trip).
• Motor load transients or sudden acceleration demands briefly exceed the configured software current limit.
• The value in parameter A448 is set too low for the application's normal operating or transient current requirements.
• Mechanical issue causing increased load on the motor, leading to higher current draw (e.g., bearing issues, pump cavitation).
• Poorly tuned current control loop within the drive, causing overshoot on current peaks.

Click steps to track your progress.

1. 1

   Monitor the actual motor output current (e.g., via HMI or oscilloscope) during operation and compare to parameter A448.

2. 2

   Verify the setting of parameter A448 (SW Current Trip) against the motor's full load amps (FLA) and application requirements.

3. 3

   Inspect the mechanical load for any binding, obstruction, or sudden changes that could cause current spikes.

4. 4

   Adjust acceleration/deceleration ramps (e.g., P1-09, P1-10) to be softer if current spikes occur during speed changes.

5. 5

   Consider slightly increasing the value of parameter A448 (SW Current Trip) if current peaks are momentary and within motor tolerance (e.g., 120% FLA).