Siemens Drive Fault Code 7902 May 2026

The fluorescent lights of the MagnaDrive factory floor hummed in a low, monotonous key, a sound usually drowned out by the rhythmic thwump-hiss-thwump of the heavy-duty stamping presses. But tonight, the factory was holding its breath.

F07902

The Siemens drive fault code indicates a "Motor Stalled" condition. This occurs when the drive detects that the motor speed is significantly below the expected setpoint while it is delivering maximum torque or current. Deep Technical Insight: Why it Occurs siemens drive fault code 7902

When encountering fault code 7902, follow these steps to troubleshoot and potentially resolve the issue: The fluorescent lights of the MagnaDrive factory floor

According to Siemens Support , you should follow these steps to resolve the fault: This occurs when the drive detects that the

Siemens drive fault code 7902

typically indicates a "Drive: Communication board (CB) link error" or a loss of communication via the PROFINET/PROFIBUS interface.

Thresholds

: If the motor is fine but the load is heavy, you might need to increase the current setpoint (p1610) or the stall delay time (p2178).

Mechanical Obstructions

: Physical blockage or high friction in the motor or driven equipment.

4. Fault Reaction (Default)

Step 4: Check for Intermittent Bus Errors