Siemens Drive Fault Code 7902 Instant

: Rerun the motor data identification at standstill by setting

: Is the motor actually jammed? Check for obstructions or a locked brake.

) at standstill to allow the drive to precisely measure stator resistance and leakage inductance. Step 3: Optimize Acceleration and Limit Parameters siemens drive fault code 7902

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

F07902 is rarely caused by a random software glitch. It is typically a direct symptom of a mechanical, electrical, or parameter configuration issue. 1. Mechanical Overload or Jamming : Rerun the motor data identification at standstill

Siemens drives do not rely solely on external sensors. They use internal at the inverter’s output stage. When the motor is running, the drive expects balanced currents. If one phase deviates by more than a programmable tolerance (typically set via parameter p3230 in Sinamics), the drive triggers fault 7902.

Disclaimer: Troubleshooting electrical drives can be dangerous. Always ensure proper Lockout/Tagout (LOTO) procedures are followed before touching motor leads or mechanical components. Step 3: Optimize Acceleration and Limit Parameters I

The most common cause is a physical obstruction or an actual mechanical stall in the driven equipment.

Option 2: Technical/Deep Dive (Best for a Blog or internal wiki)

If using an encoder, monitor the actual speed value ( r0061 or r0063 ) against the setpoint speed during the brief moments before the drive trips. If the motor is physically spinning but the drive reads 0 RPM, check the encoder wiring, power supply, and shielding. Step 5: Run Motor Identification (ID)

Redo the commissioning process with exact nameplate data.