Siemens Fault 0a7991

The rating of 3/5 reflects the moderate severity of the fault code and the availability of potential solutions. While the issue can be resolved with proper troubleshooting and support, it still causes inconvenience and disruption to users.

: Once the identification is successful, perform a "RAM to ROM" copy to ensure the data is saved permanently to the drive's memory. Related Faults to Check siemens fault 0a7991

The drive has lost power or experienced a hard reboot before a previously scheduled motor identification routine could finish successfully. The rating of 3/5 reflects the moderate severity

The Siemens alarm indicates that Motor Data Identification (ID) is currently active or scheduled to run at the next power-on command. This is a standard part of the commissioning process for Siemens SINAMICS drives (such as the G120 or G130) where the inverter measures the connected motor's characteristics to optimize control performance. Core Cause Related Faults to Check The drive has lost

: If you see both, there is likely a communication issue with the PLC. If no PLC is connected, set P2030 = 0 (No protocol) and perform a RAM to ROM save before restarting.