What it means
Alarm A02055 (Trace: Recording time too short) tells you that the duration configured for the trace function is too short. The trace duration must be at least twice the value of the trace clock cycle; a shorter setting triggers the alarm.
Why it appears
- The trace duration is set too short — it is below the minimum of twice the value of the trace clock cycle.
What to check
- Check the selected recording time for the trace; the manual cross-references it as p4721 (Trace recording time).
- Adjust the recording time if necessary so that the trace duration is at least twice the value of the trace clock cycle.
Parameters the manual names
- p4721 — Trace recording time: the parameter that holds the recording time this alarm asks you to check; adjust it so the trace duration is at least twice the value of the trace clock cycle.
Acknowledging and restarting
This alarm requires no acknowledgement, and the drive takes no protective action when it appears. Once you have checked and, if necessary, adjusted the recording time, no further reset step is needed.
What differs between the drive families
Straight from the manuals' own fields — A02055 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Error in the parameterization / configuration / commissioning procedure (18) | None | SINAMICS S120, S150 List Manual · p. 2730 |
| G130, G150 | NONE | NONE | Error in the parameterization / configuration / commissioning procedure (18) | None | SINAMICS G130, G150 List Manual · p. 1505 |
| G120 | — | NONE | Error in the parameterization / configuration / commissioning procedure (18) | — | SINAMICS G120 · p. 862 |
The drives this code lives on
A02055 is described for G120, G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does SINAMICS alarm A02055 mean?
The recording time configured for the trace function is too short. The trace duration must be at least twice the value of the trace clock cycle, and a shorter setting raises A02055.
What is the minimum trace recording time for A02055?
The trace duration must be at least twice the value of the trace clock cycle. Anything shorter than that minimum triggers the alarm.
Which parameter do I check for A02055?
p4721 (Trace recording time). Check the selected recording time there and adjust it if necessary so it meets the minimum.
Does A02055 have to be acknowledged?
No. The drive requires no acknowledgement for this alarm; the remedy is to check and, if necessary, adjust the selected recording time.
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 A02xxx group · SINAMICS manuals · Siemens manuals