What it means
This message reports that the pole position identification was not successful, because the calibration values for the current measurement are not correct. The drive raises it as alarm A07979; depending on how the drive is configured, the same condition can also be issued as a fault (F) or without a reaction (N).
Why it appears
- The pole position identification did not complete successfully, because the calibration values used for the current measurement are not correct.
What to check
- Replace the Motor Module that was involved in the pole position identification.
Acknowledging and restarting
No acknowledgement is required for this message: the drive executes no automatic reaction, and the manual names no acknowledgement step. The only remedy given is to replace the Motor Module involved; no further reset procedure is described for this code.
The same on every family
Every manual that describes A07979 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Error in the parameterization / configuration / commissioning procedure (18) | Control Unit (CU) | SINAMICS S120, S150 List Manual · p. 2899 |
The drives this code lives on
A07979 is described for S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does alarm A07979 mean on a SINAMICS S120 or S150?
It reports that the pole position identification was not successful, because the calibration values for the current measurement are not correct.
How do I fix alarm A07979?
The remedy given is to replace the Motor Module that was involved. No other corrective or reset steps are described for this code.
Does A07979 need to be acknowledged?
No. The drive executes no reaction and requires no acknowledgement while the condition is present as alarm A07979.
Can A07979 also appear as a fault?
Yes. Depending on how the drive is configured, the same condition can also be issued as a fault (F) or without a reaction (N).
Codes next to this one
Source
Written from Siemens' own List Manuals and operating instructions; every number, designation and parameter on this page is checked against them before publication.
All SINAMICS codes: fault and alarm codes · the A07xxx group · SINAMICS manuals · Siemens manuals