Siemens Drive Fault Code 7902 Link

The hum of the steel plant was Marcus’s favorite symphony, but today, the percussion was off. The overhead crane at the main hoist had ground to a halt, and the control panel was screaming in a bright, neon red: Fault F7902

Siemens drive systems are highly reliable, but like all industrial automation components, they generate fault codes to protect hardware and maintain system integrity. One common issue encountered by engineers and maintenance technicians working with Siemens SINAMICS drives (such as the S120 or G120 series) is , which indicates a "Drive: Motor stalled" condition.

Manually rotate the motor shaft or load (if safe and feasible) to check for binding, friction, or total lockups. siemens drive fault code 7902

Cross-check the motor nameplate against the drive parameters ( Perform Motor ID: Re-run the motor data identification (

Program longer acceleration ramps ( p1120 ) for heavy loads to allow torque to build up gradually. If you need help adjusting these settings, let me know: The exact Siemens drive model (e.g., G120, S120) Whether you use an encoder or run in sensorless control The type of mechanical load connected to the motor Share public link The hum of the steel plant was Marcus’s

No Motor Data Identification (Static or Rotating) was performed.

This defines the speed below which the motor is considered stalled. Default is often 20 RPM. Manually rotate the motor shaft or load (if

Increase p1610 (static torque setpoint) if stalling happens at low speeds.

) to ensure the drive truly understood the motor’s internal resistance. Adjusted Tolerance : They slightly increased the fault tolerance in and the delay time in to account for the heavy lifting cycles. Flying Restart : They ensured the "flying restart" function was active (

The most frequent culprit behind F7902 is human error during initial data entry. The drive utilizes these baseline numbers to scale its measurement pulses. If the numbers are wrong, the test fails.