Fault 0a7991 | Siemens

Ensure the motor is safe to move if a "Rotating Measurement" was selected. Once finished, the alarm will clear itself. 2. Manually Disable the Routine

The Siemens fault code (often searched as 0a7991 ) specifically indicates that Motor Data Identification is activated . This is not a critical equipment failure but rather a status alarm triggered during the commissioning or configuration phase of Siemens SINAMICS drives , such as the G120, G120C, and G150 series. Understanding Alarm A07991 siemens fault 0a7991

Either the network connection (profibus/profinet?) between the PLC controlling the drive is powered off, network connection lost ( Siemens SiePortal How can resolve the alarm Code A7991 - SiePortal - Siemens Ensure the motor is safe to move if

: The alarm typically disappears automatically once the identification routine completes successfully. Manually Disable the Routine The Siemens fault code

This alarm frequently appears alongside , which indicates a communication timeout with a PLC.

The most direct fix is to allow the drive to perform the check.