Siemens Fault 0a7991

: This turns off the motor data identification and rotation test.

The drive is prepared to perform a motor ID run (static or rotating measurement) upon the next "Start" command . siemens fault 0a7991

: It may reappear after a power loss if the identification process was never completed or if the parameters were not saved to permanent memory (RAM to ROM). Solutions to Clear the Alarm : This turns off the motor data identification

Connect online to the drive and monitor these traces: Solutions to Clear the Alarm Connect online to

After identification is complete or parameters are changed, save the settings by performing a copy (set P0971 = 1 ). This ensures the alarm does not return after a power cycle. Common Troubleshooting Scenarios

In some Siemens documentation, is linked to a "Module failure" or "Channel error" on a specific slot of a remote I/O rack (ET 200SP, ET 200M, or ET 200S).