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Asked:20 Oct 2025

SINAMICS general: F52980 Siemens drives V90

Dear people ,
There is machine with servodrive sinamics v90 with motor : 1FL6062-1AC61-0LB1. When the machine has not worked more then few hours and the operators start the cabinet F52980 appeared. 
I saw the fault list and there is written "F52980: Absolute encoder
motor changed
Reaction: OFF1
Acknowledgement:
IMMEDIATELY
The servo motor with absolute encoder is
changed. Actual motor ID is different from
commissioned motor ID.
The servo motor will be automatically configured
after the acknowledgement of this fault." , but i cant understand the reason of this fault. 
Do you have any idea what would be the main reason of this fault and if yes i would be grateful if you help me. 
Best regarsd, 
borata

#sosflex #SINAMICS general #siemens
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Answers(1)
Siemens Test Added an Answer on20 Oct 2025
Siemens Self Support - F52980 Fault

F52980 Fault - Absolute Encoder Motor Changed

Dear Borata,

The fault F52980 indicates that the SINAMICS V90 drive detects a mismatch between the currently connected motor's data (specifically the motor ID from the absolute encoder) and the motor data stored in its configuration.

Possible Causes:

  • Motor Replacement: The most common cause is a recent motor replacement where the drive wasn't properly informed about the new motor.
  • Encoder Issue: A faulty or damaged encoder on the motor can send incorrect data.
  • Cable/Connection Problem: Loose or damaged encoder cables can lead to data corruption.
  • Drive Issue: (Less common) A rare possibility is a fault within the drive's encoder interface.

Recommended Actions:

  1. Verify Motor Connection: Ensure the motor is securely connected and the encoder cable is correctly plugged in.
  2. Check Encoder Cable: Inspect the encoder cable for any damage.
  3. Motor Data in Drive: Confirm the motor parameters in the drive’s configuration match the 1FL6062-1AC61-0LB1 motor. You might need to re-enter the motor data.
  4. Acknowledge Fault: Acknowledge the fault in the drive. The drive *should* attempt auto-configuration.
  5. If Auto-configuration fails: Manually input the motor's parameters into the drive.

For detailed guidance, please refer to the SINAMICS V90 documentation on SiePortal: SINAMICS V90 Documentation.

If the problem persists after these steps, please provide more details about any recent work done on the motor or drive, and the exact parameters you've entered.

Best Regards,
Siemens Self Support

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