Siemens Drive Fault Code 7902 ((better))

7902 Typical device family: Siemens SINAMICS / SIMODRIVE (frequency converters and servo drives) Symptom: Drive reports fault 7902 and trips or blocks operation. Likely meaning: Encoder feedback error or position feedback failure detected by the drive's encoder interface. The drive cannot reliably determine motor position/speed. Common causes:

To avoid future occurrences of fault code 7902: siemens drive fault code 7902

Increase fault tolerance p1745 or delay time p2178 to make the drive less sensitive to minor stalls. 7902 Typical device family: Siemens SINAMICS / SIMODRIVE

Increase the acceleration time to give the motor more time to reach speed without hitting the stall threshold. If you are using a SINAMICS G120XA Common causes: To avoid future occurrences of fault

Unlike fault 7900 (Motor Blocked), which usually occurs at very low speeds, typically triggers when the motor enters a current limit above a specific speed threshold. The drive monitors the deviation between the speed setpoint and the actual speed feedback (or estimated speed in encoderless mode). Primary Causes & Parameters