Siemens Drive Fault Code 7902 ((new)) Jun 2026

If you must run a rotating identification ( p1910 = 2 ), uncouple the motor from the gearbox or mechanical load if possible. High load inertia or static friction during a tuning cycle will cause the identification algorithm to fail, generating an F7902 error.

No. It is a “Trip” fault, not a “Fatal” fault. Once the cause is fixed, acknowledge via terminal, bus, or operator panel.

"Partner?" Marcus asked. "The press only has one main motor." siemens drive fault code 7902

This is the timeout period for the stall detection. If a stall condition is present, the drive will wait for the duration set in P2178 (in seconds) before tripping the F7902 fault. Impact: If your system experiences brief, acceptable mechanical "binds" (e.g., in a crusher or mixer), a low value (like the default 0.05s to 0.1s) can cause nuisance trips. Increasing this to 0.15s or higher provides the motor time to break free.

As if on cue, the breakroom lights flickered. The deep, vibrating thrum of the plant’s ventilation system shuddered and died. A moment later, the emergency lights kicked in, bathing the hallway in an eerie, sterile red. If you must run a rotating identification (

Understanding the internal detection mechanisms, distinguishing it from related codes, and knowing how to adjust parameters systematically can help isolate and fix the root causes of an F07902 fault. The Technical Mechanics Behind Fault 7902

Ensure motor enclosures and feedback encoders are shielded from excessive vibration, dust, and ambient moisture. It is a “Trip” fault, not a “Fatal” fault

Elias connected the Profinet cable to the drive’s CU320-2 control unit. The laptop chimed. He navigated to the diagnostics buffer. The list was populated, but one entry was highlighted in red, pulsating with urgency.