What it means
The drive reports “PN: system redundancy switchover running” when the “PROFINET system redundancy” function is configured and the connection between the primary control and the drive device is interrupted. The backup controller then assumes control of the drive device, and the alarm accompanies this handover. The drive takes no automatic response to it — the alarm only reports that the switchover is under way and asks for no action from you.
Why it appears
- The “PROFINET system redundancy” function is configured.
- The connection between the primary control and the drive device is interrupted.
- The backup controller assumes control of the drive device — the alarm reports this switchover.
What to check
- No remedial action is necessary; the drive carries out the switchover by itself.
- Wait until the switchover has been completed — the alarm is then withdrawn automatically.
Acknowledging and restarting
No acknowledgment is required: the alarm withdraws itself automatically once the switchover to the backup controller has been completed.
The same on every family
Every manual that describes A01983 gives it the same reaction, acknowledgement and message class.
| 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. 2723 |
| G130, G150 | NONE | NONE | Error in the parameterization / configuration / commissioning procedure (18) | None | SINAMICS G130, G150 List Manual · p. 1498 |
The drives this code lives on
A01983 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 A01983 mean on a SINAMICS drive?
It reports that the configured PROFINET system redundancy is switching over: the connection between the primary control and the drive device was interrupted and the backup controller assumes control of the drive device.
Do I have to acknowledge or clear A01983?
No. The alarm requires no acknowledgment and is withdrawn automatically once the switchover has been completed.
Does A01983 stop the drive?
No. The drive takes no automatic response to this alarm — it only reports that the redundancy switchover is running.
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