Siemens Drive Fault Code 7902 -

During commissioning, if the motor nameplate data (current, power, speed, torque) was entered incorrectly, the drive’s internal mathematical model will miscalculate a stall condition.

It is important to differentiate this from . While similar, F07902 generally occurs when the motor enters a current limit situation above a specific speed threshold. Common Symptoms

The drive continuously monitors several internal metrics to calculate a stall condition:

If the fault occurs during acceleration, the drive might be trying to accelerate too fast for the motor's torque capability. siemens drive fault code 7902

The drive triggers this fault when the deviation between the calculated motor speed and the actual speed exceeds a specific threshold for a set amount of time. sinamics drive motor fault 7902 - SiePortal - Siemens

I can then provide the precise parameter steps for your scenario. sinamics drive motor fault 7902 - SiePortal - Siemens

Switch to on your control panel, press the start key, and wait for the "Motor ID" or optimization process to complete. 4. Specific Scenarios and Advanced Fixes A. If using Torque Limiting During commissioning, if the motor nameplate data (current,

: A factory-default or user-defined maintenance interval timer has run down to zero.

Access fault buffer: r0947 lists last 8 faults. r0949 gives additional info (e.g., temperature at time of trip). This helps separate actual overheat from sensor failure.

Bearings failure, broken drive components, or a faulty gearbox. sinamics drive motor fault 7902 - SiePortal -

: Acceleration torque (increase to provide more starting torque). r0949r 0949 : Fault value (interprets the exact cause of the stall). To help narrow down the solution, could you tell me:

If you have a dynamic load, try increasing the or decreasing the Integral Time (p1472) to make the speed controller more responsive. Step 5: Check Encoder/Sensorless Settings

The drive relies on precision electrical characteristics (stator resistance, leakage inductance) to model the rotor's exact movement. Skipping the standstill or rotating data identification tests () after commissioning or changing motor cables triggers false stalls. sinamics drive motor fault 7902 - SiePortal - Siemens