What it means
A07581 is raised when an error occurs during the position actual value preprocessing of Encoder 1 — the drive has detected the error while processing this encoder's position signal. Depending on the drive's configuration, the same condition can also be output as fault F07581 instead of the alarm A07581.
Why it appears
- An error has occurred during the position actual value preprocessing of Encoder 1 — the manuals name no other cause for this message.
What to check
- Check the encoder used for the position actual value preprocessing.
- Check the encoder assignment in p2502 (LR encoder assignment), to which the manual cross-refers for this message.
Parameters the manual names
- p2502 — LR encoder assignment / encoder assignment: the manual's cross-reference for this alarm; check here which encoder is assigned for the position actual value preprocessing.
Acknowledging and restarting
While A07581 is present only as an alarm, the drive does not react to it and no acknowledgement is required. The behaviour changes when the drive's configuration outputs the same condition as fault F07581: the drive then reacts with OFF1 (OFF2, OFF3 as selectable alternatives), and the fault must be acknowledged IMMEDIATELY. Check the encoder used for the position actual value preprocessing — and the encoder assignment in p2502 where the manual cross-refers to it — then acknowledge the fault so that the drive can be started again.
The same on every family
Every manual that describes A07581 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Actual position/speed value incorrect or not available (11) | Encoder 1 | SINAMICS S120, S150 List Manual · p. 2852 |
| G130, G150 | NONE | NONE | Actual position/speed value incorrect or not available (11) | Encoder 1 | SINAMICS G130, G150 List Manual · p. 1586 |
The drives this code lives on
A07581 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 A07581 mean on a SINAMICS drive?
It reports that an error occurred during the position actual value preprocessing of Encoder 1. Depending on the drive configuration, the same condition can also appear as fault F07581.
How is A07581 acknowledged and cleared?
As an alarm it requires no acknowledgement and the drive does not react to it. If it is output as fault F07581, the fault reaction is OFF1 (OFF2, OFF3 as selectable alternatives) and the fault must be acknowledged IMMEDIATELY.
Which parameter should I check for A07581?
p2502, the LR encoder assignment. The manual refers to this encoder assignment in the remedy, alongside checking the encoder used for the position actual value preprocessing.
Does A07581 stop the drive?
Not while it is present as an alarm. As fault F07581 the drive executes OFF1, with OFF2 or OFF3 selectable as alternative reactions.
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