What it means
A07975 is an alarm that belongs to the encoder adjustment (p1990), in which the angular commutation offset is determined. At this point of the procedure the zero mark must be evaluated: the drive travels to the zero mark and waits for a speed or torque setpoint to be entered. It signals a waiting state within the adjustment procedure and requires no repair. Depending on how the drive is configured, the same condition can also be output with no reaction (N).
Why it appears
- The zero mark must be evaluated so that the encoder can be adjusted — the drive is in the travel-to-the-zero-mark step of this adjustment.
- The procedure expects that a speed or torque setpoint is entered, and the drive is waiting for that input.
What to check
- No remedial action is necessary — the manual states this explicitly for this alarm.
- If you are carrying out the encoder adjustment, enter the speed or torque setpoint the drive is waiting for so the travel to the zero mark can proceed.
- Wait for the zero mark to be detected; the alarm then clears itself without any acknowledgement.
Parameters the manual names
- p1990 — the encoder adjustment that determines the angular commutation offset; A07975 occurs within this procedure at the point where the zero mark must be evaluated and the setpoint input is expected.
Acknowledging and restarting
No acknowledgement is required. The alarm withdraws itself once the zero mark has been detected; until then it simply indicates that the drive is waiting for the speed or torque setpoint input.
The same on every family
Every manual that describes A07975 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| G130, G150 | NONE | NONE | Error in the parameterization / configuration / commissioning procedure (18) | None | SINAMICS G130, G150 List Manual · p. 1624 |
| S120, S150 | NONE | NONE | Error in the parameterization / configuration / commissioning procedure (18) | None | SINAMICS S120, S150 List Manual · p. 2898 |
The drives this code lives on
A07975 is described for G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does SINAMICS alarm A07975 mean?
It appears during encoder adjustment (p1990, determination of the angular commutation offset): the zero mark must be evaluated, the drive travels to the zero mark, and a speed or torque setpoint is expected to be entered.
How do I clear or acknowledge A07975?
No acknowledgement and no remedial action are necessary — the alarm disappears automatically once the zero mark has been detected.
Why is the drive waiting for a setpoint input?
The zero mark has to be evaluated to adjust the encoder, and the procedure expects that a speed or torque setpoint is entered for the travel to the zero mark.
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