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Access drive parameter settings via HMI: Commissioning → Drive → Axis configuration → Select affected axis

Locate MD1134 MOTOR_NOMINAL_FREQUENCY and check current value (should match motor nameplate frequency, typically 50 Hz or 60 Hz for EU/US standard motors)

Enter correct motor nominal frequency from motor nameplate data (e.g., 50.0 or 60.0 Hz depending on motor specification)

Ensure value matches motor nameplate exactly - incorrect frequency can cause motor damage or performance issues

Save parameters, perform power cycle of NCU/drive module, and clear alarm to verify proper axis initialization

Check NCU battery voltage and status (should be >3.0V) via Diagnostics → Hardware → NCU status display

Low battery can cause random parameter loss across multiple axes

Restore drive parameters from most recent backup file: Commissioning → System data → Load machine data → Select backup archive

Verify backup date matches last known good configuration before loading

If no backup available, manually re-enter all motor parameters for affected axis from commissioning documentation (MD1134, MD1135, MD1136, etc.)

Create new parameter backup after verification, replace NCU battery if voltage low, and document all restored parameters

Verify motor type setting in MD1100 MOTOR_TYPE matches actual connected motor (1=torque motor, 2=linear motor, 3=asynchronous motor, etc.)

Cross-reference motor model number from nameplate with Siemens motor database to confirm correct motor type classification

If motor type incorrect, run complete motor commissioning wizard: Commissioning → Drive → Motor commissioning → Select correct motor type and follow wizard steps

Incorrect motor type can damage motor or drive - verify before proceeding

Complete motor data optimization and auto-tuning sequence, then verify MD1134 is populated with correct nominal frequency value