Cause: Load slipping comes when the difference between the output frequency and the speed feedback is not correct. This often occurs when there's an imbalance between the driving force and the load resistance.

"Load slipping" refers to a situation where the driven component (like a pulley, gear, or wheel) fails to maintain adequate traction with the driving component, resulting in a loss of power transmission.

"AnF" fault in Schneider ATV950 drive indicate an Load slipping condition. This means the drive fails to maintain proper control over the motor, causing the load to slip or lose synchronization.

Here are steps to troubleshoot and address load slipping:

1. Check Motor and Load:

• Mechanical Inspection: Inspect the motor and the connected load for any mechanical issues such as worn-out belts, loose couplings, or misaligned components.
• Load Condition: Ensure the load is not exceeding the motor's capacity. Overloading can cause the motor to slip.

2. Verify Drive Settings:

• Torque Settings: Ensure the drive's torque settings are correctly configured to handle the load. Adjust the torque limit parameters if necessary.
• Speed Settings: Verify that the speed settings are appropriate for the application. Incorrect speed settings can cause instability.

3. Check Motor Parameters:

• Motor Ratings: Ensure that the motor ratings (voltage, current, frequency) match the drive settings.
• Motor Control Mode: Verify that the correct motor control mode (e.g., V/f control, vector control) is selected for your application.

4. Examine Power Supply:

• Voltage Stability: Ensure that the power supply is stable and within the drive's specified voltage range. Voltage fluctuations can affect motor performance.
• Power Quality: Use a power quality analyzer to check for disturbances that could impact motor control.

5. Review Drive Configuration:

• Parameter Tuning: Fine-tune the drive parameters such as acceleration/deceleration times, ramp rates, and PID settings to improve motor control.
• Firmware Updates: Ensure the drive firmware is up-to-date to benefit from any improvements or fixes related to load control.

6. Inspect Feedback Systems:

• Encoder/Resolver: If your system uses an encoder or resolver for feedback, ensure it is functioning correctly and providing accurate signals to the drive.
• Feedback Wiring: Check the wiring and connections of feedback devices for any faults or loose connections.