What it means
A07457 comes from the EPOS function: the drive has identified an illegal combination of input signals that are simultaneously set. The EPOS commands — jog 1, jog 2, direct setpoint input/MDI, starting referencing and activating a traversing task — must not be requested in certain combinations at the same time, and the alarm reports which commands conflict. The combination is written as an alarm value to r2124 and is to be interpreted as a decimal number. The manuals for the G130/G150 and the S120/S150 describe this alarm in the same way.
Why it appears
- An illegal combination of input signals that are simultaneously set was identified — two or more of the EPOS commands named by the alarm value are active at the same time.
- Which commands conflict is stated by the alarm value in r2124; the possible values 0 to 6 are decoded in the fault value list below.
What to check
- Read the alarm value in r2124 and interpret it as a decimal number to determine which combination of commands is illegal.
- Check the appropriate input signals — the signal sources (BI) of the commands named by the alarm value: p2589 (jog 1), p2590 (jog 2), p2647 (direct setpoint input/MDI), p2595 (referencing start) and p2631 (activate traversing task).
- Correct the signals so that the conflicting commands are no longer set at the same time.
Reading the message value
- The alarm carries the alarm value; the drive writes it to r2124 and it is to be interpreted as a decimal number.
- 0: Jog 1 and jog 2 (p2589, p2590).
- 1: Jog 1 or jog 2 and direct setpoint input/MDI (p2589, p2590, p2647).
- 2: Jog 1 or jog 2 and start referencing (p2589, p2590, p2595).
- 3: Jog 1 or jog 2 and activate traversing task (p2589, p2590, p2631).
- 4: Direct setpoint input/MDI and starting referencing (p2647, p2595).
- 5: Direct setpoint input/MDI and activate traversing task (p2647, p2631).
- 6: Start referencing and activate traversing task (p2595, p2631).
Parameters the manual names
- r2124 — alarm value: read it (interpret decimal) to see which illegal signal combination triggered A07457.
- p2589 — BI: EPOS jog 1 signal source; check here when the alarm value names jog 1.
- p2590 — BI: EPOS jog 2 signal source; check here when the alarm value names jog 2.
- p2647 — BI: EPOS direct setpoint input/MDI selection; check here when the alarm value names this command.
- p2595 — BI: EPOS referencing start; check here when the alarm value names referencing.
- p2631 — BI: EPOS activate traversing task (0 -> 1); check here when the alarm value names a traversing task.
Acknowledging and restarting
A07457 does not require acknowledgement. Once the input signals have been corrected so that no illegal combination is set anymore, the alarm is gone — no fault reset is needed.
The same on every family
Every manual that describes A07457 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| G130, G150 | NONE | NONE | Application/technological function faulted (17) | None | SINAMICS G130, G150 List Manual · p. 1557 |
| S120, S150 | NONE | NONE | Application/technological function faulted (17) | None | SINAMICS S120, S150 List Manual · p. 2821 |
The drives this code lives on
A07457 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 A07457 mean on a SINAMICS drive?
It comes from the EPOS function and reports an illegal combination of input signals that are set at the same time — for example jogging while referencing is started. The alarm value in r2124 (interpreted decimal) states exactly which commands conflict.
How do I clear A07457?
Check the signal sources of the conflicting commands (p2589, p2590, p2647, p2595, p2631) and correct them so they are no longer set simultaneously. No acknowledgement is required.
Which signal combinations are illegal for EPOS?
Six combinations, for example jog 1 and jog 2 together (alarm value 0) or start referencing and activate traversing task together (alarm value 6). The full decoding of the r2124 values 0 to 6 is on this page.
Where can I see which commands conflict?
In r2124. Interpret the alarm value as a decimal number; each value 0 to 6 names one illegal combination together with the parameters of the signals involved.
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