What it means
A06800 is raised on the infeed when the DC link voltage setpoint reaches the maximum steady-state DC link voltage parameterized in p0280. It is the modulation depth reserve controller that increases the DC link voltage, so this alarm tells you that the controller had a reason to push the voltage up to the p0280 limit. Depending on the drive configuration, the same condition can also be issued as a fault (F) instead of an alarm.
Why it appears
- The modulation depth reserve is too low (p3480).
- The line supply voltage is too high.
- The line supply voltage is parameterized too low in p0210.
- The setpoint for the reactive line current is excessively high.
What to check
- Check the line supply voltage setting (p0210).
- Check the line supply for an overvoltage condition.
- Reduce the modulation depth reserve (p3480).
- Reduce the setpoint for the reactive line current.
Parameters the manual names
- p0210 (Drive unit line supply voltage, U_connect): the parameterized line supply voltage; check this setting as the first remedy for A06800.
- p0280 (DC link voltage maximum steady-state, Vdc_max stat): the maximum steady-state DC link voltage, the limit the setpoint has reached.
- p3480 (Infeed modulation depth limit, INF mod_depth lim): the modulation depth reserve; reducing it is one of the remedies for A06800.
Acknowledging and restarting
As an alarm, A06800 needs no acknowledgement. If the drive raises the same condition as a fault, the drive does not shut down automatically by default (OFF1 or OFF2 can be configured instead); once the cause has been removed, the fault can be acknowledged immediately, and switching POWER ON also clears it.
The same on every family
Every manual that describes A06800 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Infeed faulted (13) | Power Module | SINAMICS S120, S150 List Manual · p. 2770 |
The drives this code lives on
A06800 is described for S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does alarm A06800 mean on a SINAMICS S120 or S150?
It is an infeed alarm: the DC link voltage setpoint has reached the maximum steady-state DC link voltage parameterized in p0280. The modulation depth reserve controller is what raised the DC link voltage to this limit. Depending on the configuration, the same condition can also appear as a fault (F).
Why does the DC link voltage rise to the p0280 limit?
The modulation depth reserve controller increases it because the modulation depth reserve is too low (p3480), the line supply voltage is too high, the supply voltage is parameterized too low in p0210, or the setpoint for the reactive line current is excessively high.
How do I fix alarm A06800?
Check the line supply voltage setting (p0210) and check the line supply for an overvoltage condition, then reduce the modulation depth reserve (p3480) and reduce the reactive current setpoint.
Does A06800 have to be acknowledged?
Not as an alarm, no acknowledgement is required. If the drive raises the condition as a fault, it can be acknowledged immediately once the cause is removed, and switching POWER ON also clears it.
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