Siemens Fault 0a7991 <Android>

Siemens Alarm A07991 (or A7991) on SINAMICS G120/S120 drives indicates that Motor Data Identification (ID) is active, requiring a motor ID run or manual adjustment to clear. The condition is resolved by running a motor identification, setting parameter P1900 to 0, or bypassing calculations via P340 during commissioning. For detailed solutions and forum discussions, visit Siemens SiePortal Dealing with Motor ID ( code 7991 ) - SiePortal - Siemens

“If this is a Factory Acceptance Test (FAT), the correct motor may not be available; make P1900 = 0 to inhibit the 'Motor identification'.” Siemens SiePortal siemens fault 0a7991

In some cases, setting (V/f control mode) is also used to bypass complex motor modeling . Finalize the Setup Siemens Alarm A07991 (or A7991) on SINAMICS G120/S120