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Alarm · SINAMICS S120, S150

A07965Drive: Save required

What it means

On S120 and S150 drives, A07965 (Drive: Save required) tells the technician that the angular commutation offset (p0431) has been re-defined and that this new value has not been saved yet. The value is only held temporarily; for it to be permanently accepted, it must be written to non-volatile memory. Depending on how the drive is configured, the same condition can also be signaled with no reaction (N) instead of as an alarm.

Why it appears

  • The angular commutation offset (p0431) was given a new value and has still not been saved; the manual cross-references the encoder adjustment that determines this offset (p1990) under this alarm.
  • The new offset value only exists temporarily. For it to be permanently accepted, it must be saved in a non-volatile fashion (p0971, p0977), and that save has not been carried out yet.

What to check

  1. Save the changed parameters: use p0971 to save the drive object parameters, or p0977 to save all parameters. Either save permanently accepts the re-defined angular commutation offset.
  2. Do nothing further — the manual's remedy is 'not necessary'. The drive withdraws the alarm automatically once the data has been saved.

Parameters the manual names

  • p0431 — angular commutation offset: the value whose re-definition raises this alarm until it is saved.
  • p0971 — save drive object parameters: writes the new angular commutation offset of the drive object permanently to non-volatile memory, clearing the alarm.
  • p0977 — save all parameters: the alternative save command that permanently accepts the new offset value.
  • p1990 — encoder adjustment 'determine angular commutation offset': the function the manual names alongside this alarm, because it re-defines p0431 and thereby triggers the save reminder.

Acknowledging and restarting

No acknowledgement and no manual reset step are required. As soon as the parameters have been saved with p0971 or p0977, the drive withdraws A07965 by itself; until then it remains standing as a reminder that the new angular commutation offset is not yet stored permanently.

The same on every family

Every manual that describes A07965 gives it the same reaction, acknowledgement and message class.

Drive familyReactionAcknowledgeMessage classComponentManual
S120, S150NONENONEError in the parameterization / configuration / commissioning procedure (18)NoneSINAMICS S120, S150 List Manual · p. 2894

The drives this code lives on

A07965 is described for S120, S150. These are the converters of those families in our catalogue — price on request.

Questions technicians ask

What does alarm A07965 mean on a SINAMICS drive?

It means the angular commutation offset (p0431) was re-defined and has not been saved yet. The drive raises the alarm so the new value is saved and becomes permanent.

How do I clear A07965?

Save the parameters with p0971 (drive object parameters) or p0977 (all parameters). The alarm is then withdrawn automatically — no acknowledgement is needed.

Why does A07965 appear after encoder adjustment?

Determining the angular commutation offset (p1990) gives p0431 a new value. Until that value is saved non-volatilely, the drive keeps this alarm active.

Can A07965 appear without any reaction?

Yes. Depending on the drive configuration, the same condition can also be signaled with no reaction (N) instead of as an alarm.

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