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the fault occurs (e.g., instantly at startup, during acceleration, or randomly during runtime)
If you want to dive deeper into a specific part of this issue, please let me know: siemens drive fault code 7902
When a Siemens SINAMICS drive (such as the S120, G120, G130, or S210) displays F07902 , it is triggering a alarm. The official Siemens definition is that the drive has detected a "motor stalled" condition.
Connect to the drive using Siemens Starter, Startdrive, or the BOP-2/AOP30 operator panel. This public link is valid for 7 days
"Could be mechanical," Marcus said, consulting his mental checklist. "But F7902 is a speed adaptation controller error. The drive
If you are using an encoder, ensure the is correct. If the inverter spins the motor in the opposite direction of the encoder feedback, a 7902 or 7801 fault will occur. Can’t copy the link right now
While the core logic of F7902 is consistent, specific product lines have unique considerations:
If there is an output contactor installed between the drive and the motor, ensure that it is commanded to close before the drive attempts the identification run. If the contactor remains open, the drive looks into an open circuit and triggers F7902.
Understanding what causes the stall detection to trip will help narrow down your physical and software-based checks.
: Sets the maintenance interval duration for the motor. 4. Reset the Maintenance Timer