Siemens Fault 0a7991

Once the identification is successfully completed, the drive's control over the motor is significantly more precise, leading to better energy efficiency and smoother operation. How to Resolve the Alarm There are two primary ways to clear A07991: Complete the Identification:

Once finished, the alarm will disappear automatically, and P1900 will reset to 0 . : siemens fault 0a7991

Method 1: Perform the Motor Identification Run (Recommended) Finalize the Setup

In some cases, setting (V/f control mode) is also used to bypass complex motor modeling . Finalize the Setup and the alarm will vanish.

. This is an alarm rather than a critical fault, signaling that the drive is prepared to measure motor parameters during the next "Power On" or "Run" command. Meaning & Causes Identification Pending

Once the measurement finishes, the drive will automatically set parameter p1900 to 0 , and the alarm will vanish.