What it means
A01772 is an SI Motion P1 message from the Control Unit (CU). It is issued while the forced checking procedure — the test stop — for the fail-safe digital outputs (F-DO: failsafe digital output) is running; the message's cause text refers to the failsafe digital inputs. The alarm reports nothing beyond the fact that this test stop is in progress, and the drive takes no automatic reaction to it.
Why it appears
- The drive is currently carrying out the forced checking procedure (test stop) for the failsafe digital inputs.
What to check
- Wait for the test stop to finish on its own — no manual checks, settings or corrective steps are described for this alarm.
Acknowledging and restarting
The alarm requires no acknowledgment. It is withdrawn automatically once the test stop has ended successfully or has been canceled (when a fault condition occurs) — there is nothing to reset.
The same on every family
Every manual that describes A01772 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. 2699 |
| G130, G150 | NONE | NONE | Safety monitoring channel has identified an error (10) | Control Unit (CU) | SINAMICS G130, G150 List Manual · p. 1478 |
The drives this code lives on
A01772 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 A01772 mean?
It is an SI Motion P1 message from the Control Unit (CU) telling you that the forced checking procedure — the test stop — for the fail-safe digital outputs is currently running. The drive takes no automatic reaction to it.
How do I acknowledge or reset alarm A01772?
You do not have to: no acknowledgment is required. The alarm withdraws automatically once the test stop has ended successfully or has been canceled because a fault condition occurred.
Does alarm A01772 stop the drive?
No. The alarm only reports that the test stop is in progress, the drive takes no automatic reaction to it, and it clears itself when the test stop ends or is canceled.
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