[p1900 = 2] ➔ [Issue ON Command] ➔ [Wait 15s for Current Injection] ➔ [p1900 Auto-Resets to 0] ➔ [Execute RAM-to-ROM Save] Method B: Disabling the Motor Identification Routine

: If disabling the motor ID causes an overcurrent fault, the motor data might be incorrectly parameterized, or the control mode ( p1300 ) might be too aggressive for the unmeasured motor. If you tell me the exact drive model (e.g., SINAMICS G120C Go to product viewer dialog for this item.

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Ensure the motor is at a standstill and the configuration is complete.

If you're in a hurry or performing a test (like a Factory Acceptance Test) without a motor connected, you can bypass the requirement:

For some specific testing scenarios, setting can also remove the requirement for motor details. Save Settings (Ram to Rom) :

Master Guide: Troubleshooting Siemens Alarm A07991 Best Practices The Siemens Sinamics drive alarm A07991 Go to product viewer dialog for this item.

It is not an indication that your motor or drive is broken. Specifically, the description for this code is "Drive: Motor data identification activated." In simple terms, the drive is telling you: "I am ready to perform a specialized tuning routine the next time you press 'Start.'"

It's also beneficial to know the key parameters that influence the motor identification process, as they help fine-tune the drive's performance to your motor's exact characteristics.

The drive accurately predicts magnetic losses.

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: Once completed, the drive sets parameter p1900 back to 0 automatically, and alarm A07991 clears.