Siemens F7900 fault code meaning

Series: V90

Motor stalled/speed controller at limit

servo drive

Meaning: The servo motor has run at maximum torque for longer than 1 s, with the speed below threshold 120 rpm. This signal is issued when the actual speed value oscillates and the speed controller output repeatedly reaches its limit.

Possible causes

Source: SINAMICS V90 PROFINET, SIMOTICS S-1FL6 Operating Instructions P380