What it means
A06502 is issued by the infeed when line synchronization cannot be achieved within the monitoring time p5481[2] during transformer magnetization. It is present here as an alarm; depending on the drive's configuration, the same condition can also be signaled as a fault or with no reaction.
Why it appears
- The infeed was unable to achieve line synchronization within the monitoring time p5481[2].
What to check
- Check the setting of the threshold value p5485 (Transformer magnetization voltage thresholds).
- Check the setting of the maximum time p5481[2] (Transformer magnetization times).
- Check the line supply quality.
Parameters the manual names
- p5481 (Transformer magnetization times / Tr mag t) — for this message, p5481[2] is the maximum time within which line synchronization must succeed; check this setting when A06502 appears.
- p5485 (Transformer magnetization voltage thresholds / Tr mag U_thr) — the threshold value named in the remedy for this message; check its setting.
Acknowledging and restarting
As an alarm, A06502 does not have to be acknowledged and does not switch the drive off. If the drive is configured so that the same condition appears as a fault, it must be acknowledged immediately; the OFF1 and OFF2 reactions have no effect for this message, so the infeed is not switched off automatically in that case either.
The same on every family
Every manual that describes A06502 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Network fault (2) | Power Module | SINAMICS S120, S150 List Manual · p. 2768 |
The drives this code lives on
A06502 is described for S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does A06502 mean on a SINAMICS S120 or S150?
The infeed could not achieve line synchronization within the transformer magnetization monitoring time p5481[2]. The condition appears as alarm A06502 and, depending on the configuration, can also be issued as a fault or with no reaction.
Does A06502 stop the drive?
No. As an alarm it has no automatic effect and needs no acknowledgment; even as a fault the OFF1 and OFF2 reactions have no effect, although the fault must then be acknowledged immediately.
How do I clear A06502?
Check the threshold value p5485, the maximum time p5481[2] and the line supply quality. The alarm itself requires no acknowledgment.
Which parameters belong to A06502?
p5481 (Transformer magnetization times), whose index [2] is the monitored maximum time, and p5485 (Transformer magnetization voltage thresholds).
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 A06xxx group · SINAMICS manuals · Siemens manuals