Drive: load failure

What does F07936 mean?

The load monitoring function has detected a significant failure in the mechanical load connected to the drive. This indicates a deviation from expected load conditions, potentially caused by a broken belt, coupling, or other mechanical issue in the driven machinery. If unaddressed, this can lead to production downtime or further mechanical damage.

• Broken mechanical component in the load (e.g., belt, gearbox shaft, coupling) causing the motor to run freely or with reduced resistance.
• Loss of mechanical coupling between the motor and the load (e.g., keyway sheared, setscrew loose).
• Incorrectly configured load monitoring parameters (e.g., P0595 (Load monitoring threshold), P0596 (Load monitoring delay)) leading to false trips.
• A sensor providing load feedback (e.g., torque sensor) has failed or is giving erroneous readings.
• Overload condition causing the motor to stall or significantly reduce speed while drawing high current, interpreted as 'load failure'.

Click steps to track your progress.

1. 1

   1. Inspect the mechanical load system (belts, gears, couplings, bearings) for any signs of breakage, jamming, or disengagement.

2. 2

   2. Monitor motor current (r0027), motor torque (r0031), and motor speed (r0021) to identify any sudden drops or unexpected fluctuations in load.

3. 3

   3. Verify the settings of load monitoring parameters (e.g., P0595 (Load monitoring threshold), P0596 (Load monitoring delay)) are appropriate for the application.

4. 4

   4. Check the integrity of any external load sensors (e.g., torque transducer) if used, by verifying their output signal.

5. 5

   5. Perform a manual jog or slow run of the motor and load, observing for unusual noises, vibrations, or free movement indicating a disconnected load.