Siemens Drive Fault Code 7902 (HD)

The above two conditions have simultaneously persisted longer than the stall delay time ( p2177p 2177 Primary Causes of Fault 7902

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

Fault F07902 occurs when the drive detects that the motor has stalled or is unable to rotate at the commanded speed for a specified period. The drive monitors the relationship between the applied current, the actual speed (or estimated speed in sensorless control), and the torque. If the motor is drawing high current but failing to move—or moving too slowly—the drive triggers F07902 and trips to prevent thermal damage to the motor windings and the inverter. Common Causes of Fault F07902 siemens drive fault code 7902

Are you using or is it in sensorless (V/f) control? sinamics drive motor fault 7902 - SiePortal - Siemens

This is the time the drive waits before tripping. Increase this value slightly if your application experiences high-inertia startups. Common Causes of Fault F07902 Are you using

The load is physically stuck, overloaded, or the brake is not releasing.

: If no mechanical issue is found, you can increase the stall detection delay or tolerance in parameters p1745p 1745 p2178p 2178 The load is physically stuck, overloaded, or the

): Give high-inertia loads more time to accelerate without oversaturating the current loop. Verify Current Limit ( p0640p 0640

If your application uses closed-loop control, a malfunctioning encoder, loose encoder coupling, or damaged feedback cable can report an incorrect speed of 0 RPM to the drive, tricking the firmware into diagnosing a mechanical stall. Step-by-Step Troubleshooting Process

A loose connection or broken cable between the drive and the motor. Troubleshooting & Solutions Check for Mechanical Obstructions:

Before changing any settings, ensure the motor can spin freely. Disconnect power to the drive.