What it means
A07591 is the alarm of the second encoder (Encoder 2). It reports that a Drive Data Set changeover (DDS) was requested while the drive was still in operation, and that the changeover concerned is one which changes the mechanical relationships together with the encoder assignment (p2502). Depending on the drive's configuration, the same condition can also be issued as a fault rather than only as an alarm. Encoder 1 and Encoder 3 have their own codes for this situation (A07590 and A07592).
Why it appears
- A Drive Data Set changeover (DDS) was requested while the drive was in operation.
- The changeover concerned changes the mechanical relationships and the encoder assignment (p2502).
What to check
- Leave the “operation” mode first — the manuals put it plainly:
To changeover the drive data set, initially, exit the “operation” mode.
- Only once the drive is out of operation, carry out the Drive Data Set changeover with the new mechanical relationships and encoder assignment (p2502).
Parameters the manual names
- p2502 — encoder assignment (LR encoder assignment): the DDS changeover that triggered A07591 includes a change of this encoder assignment, which is why the alarm names p2502.
Acknowledging and restarting
As an alarm, A07591 does not have to be acknowledged — the fix is to exit the “operation” mode and then perform the DDS changeover. If the drive's configuration raises the same condition as a fault, the drive reacts with OFF1 (OFF2, OFF3) and the fault must be acknowledged IMMEDIATELY.
The same on every family
Every manual that describes A07591 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Application/technological function faulted (17) | None | SINAMICS S120, S150 List Manual · p. 2854 |
| G130, G150 | NONE | NONE | Application/technological function faulted (17) | None | SINAMICS G130, G150 List Manual · p. 1588 |
The drives this code lives on
A07591 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 alarm A07591 mean on a SINAMICS drive?
It reports that a Drive Data Set changeover (DDS) was requested while the drive was in operation, and that this changeover changes the mechanical relationships and the encoder assignment (p2502). The message concerns Encoder 2.
How do I clear A07591?
Exit the “operation” mode first and only then carry out the Drive Data Set changeover. As an alarm the message needs no acknowledgement; if it is configured as a fault, acknowledge it IMMEDIATELY.
Does A07591 stop the drive?
As an alarm it causes no reaction — it only flags that the changeover was requested during operation. If the same condition is configured as a fault, the drive reacts with OFF1 (OFF2, OFF3) and the fault must be acknowledged IMMEDIATELY.
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