What it means
A01795 is an SI Motion alarm raised on the Control Unit (CU). When the drive exits the "safe pulse cancellation" state, a wait time of 5 seconds begins, during which encoderless actual value sensing has to be activated so that the extended functions are available without selection. If this activation does not succeed within the wait time of 5 seconds, the drive changes back into the "safe pulse cancellation" state and this alarm appears. The alarm triggers no automatic drive response and requires no acknowledgment.
Why it appears
- After exiting the "safe pulse cancellation" state, the drive waited 5 seconds for encoderless actual value sensing to be activated for the extended functions without selection.
- This activation did not succeed within the wait time, so the drive changed back into the "safe pulse cancellation" state.
What to check
- Check r0046 for enable signals that are missing and prevent the drive control from being commissioned.
- Evaluate possible fault messages of the encoderless actual value sensing and remove them.
Parameters the manual names
- r0046 — for this alarm, check here for the missing enable signals that prevent the drive control from being commissioned.
Acknowledging and restarting
This alarm requires no acknowledgment. It is resolved by removing its cause: restore the missing enable signals that prevent the drive control from being commissioned and clear any faults of the encoderless actual value sensing, so that the activation can succeed within the wait time of 5 seconds.
The same on every family
Every manual that describes A01795 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Safety monitoring channel has identified an error (10) | Control Unit (CU) | SINAMICS S120, S150 List Manual · p. 2706 |
| G130, G150 | NONE | NONE | Safety monitoring channel has identified an error (10) | Control Unit (CU) | SINAMICS G130, G150 List Manual · p. 1485 |
The drives this code lives on
A01795 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 A01795 mean on a SINAMICS drive?
It is an SI Motion alarm of the Control Unit: after exiting the "safe pulse cancellation" state, encoderless actual value sensing could not be activated for the extended functions without selection within the wait time of 5 seconds, so the drive changed back into that state.
How do I fix alarm A01795?
Check r0046 for enable signals that are missing and prevent the drive control from being commissioned, and evaluate possible fault messages of the encoderless actual value sensing and remove them.
Does A01795 have to be acknowledged?
No, this alarm requires no acknowledgment. It is resolved by removing its cause.
Why does my drive go back into safe pulse cancellation?
Because the wait time of 5 seconds expired before encoderless actual value sensing could be activated for the extended functions without selection; the drive then changes back into the "safe pulse cancellation" state.
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 A01xxx group · SINAMICS manuals · Siemens manuals