Siemens Fault 0a7991 Online

If you do not wish to perform the identification (e.g., during bench testing without a motor), you can disable it via the Siemens Parameter List :

When this code appears, the drive is notifying you that a motor identification routine has been scheduled or is currently running. This routine is essential for the inverter to learn the electrical characteristics of the connected motor (such as resistance and inductance) to ensure precise control. siemens fault 0a7991

: While this alarm is active—especially if a rotating measurement is selected—you may be unable to save parameter assignments to the ROM until the process finishes. Common Troubleshooting Steps If you do not wish to perform the identification (e

If you are performing a without the final motor, attaching a smaller spare motor can sometimes bypass identification faults by providing enough feedback for the drive to initialize. Alarms A 7991 and A8526 - SiePortal - Siemens Common Troubleshooting Steps If you are performing a