What it means
A07850 “External alarm 1” is raised when the condition for “External alarm 1” is satisfied. The drive registers a 1/0 edge at binector input p2112 and reports this as an external alarm; the signal source interconnected at p2112 defines what this condition is. The alarm triggers no automatic drive response and needs no acknowledgment — it only tells you that the external condition is present. Depending on how the drive is configured, the same condition can also be output as a fault. The neighbouring messages A07851 (External alarm 2) and A07852 (External alarm 3) cover further external alarms.
Why it appears
- The condition for “External alarm 1” is satisfied — the drive has registered a 1/0 edge at binector input p2112.
- Parameter p2112 defines the signal source of the external alarm, so which condition lies behind A07850 depends on how p2112 is interconnected in the machine.
What to check
- Use p2112 (BI: External alarm 1) to establish which signal is interconnected as the source of “External alarm 1”.
- Determine why this signal changed from 1 to 0 — that change of state is what initiated the alarm.
- Eliminate the causes of this alarm.
Parameters the manual names
- p2112 (BI: External alarm 1) — binector input whose signal source defines “External alarm 1”; the alarm is initiated by the 1/0 edge at this input, so it is the parameter to consult to trace what triggered A07850.
Acknowledging and restarting
As an alarm, A07850 requires no acknowledgment; the remedy is to eliminate the causes of the alarm. If the drive is configured to output the same condition as a fault instead, the fault must be acknowledged after the cause has been rectified, using the acknowledgment applying to the drive object concerned as printed with this code.
What differs between the drive families
Straight from the manuals' own fields — A07850 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | External measured value / signal state outside the permissible range (16) | None | SINAMICS S120, S150 List Manual · p. 2870 |
| G130, G150 | NONE | NONE | External measured value / signal state outside the permissible range (16) | None | SINAMICS G130, G150 List Manual · p. 1601 |
| G120 | NONE | NONE | External measured value / signal state outside the permissible range (16) | — | SINAMICS G120 · p. 883 |
| G120XA | NONE | NONE | — | — | SINAMICS G120XA PN converter · p. 1134 |
| G120C | — | — | — | — | SINAMICS G120C Converters · p. 385 |
| G115D | — | — | — | — | SINAMICS G115D distributed drive · p. 394 |
The drives this code lives on
A07850 is described for G115D, G120, G120C, G120XA, G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does SINAMICS alarm A07850 External alarm 1 mean?
The drive is reporting that the condition for “External alarm 1” is satisfied: a 1/0 edge has been registered at binector input p2112. The drive takes no automatic action and the alarm needs no acknowledgment.
How do I fix alarm A07850?
Use p2112 to find which signal is connected as the source of the external alarm, establish why it changed from 1 to 0, and eliminate that cause.
Which parameter is behind A07850?
p2112 (BI: External alarm 1) — it defines the signal source of the external alarm, and the alarm is initiated by the 1/0 edge at this input.
Can A07850 also appear as a fault?
Yes. Depending on how the drive is configured, the same condition can also be output as a fault instead of the alarm; in that case it must be acknowledged after the cause has been rectified.
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 A07xxx group · SINAMICS manuals · Siemens manuals