What it means
The infeed calibrates the offset of its current measurement (current offset calibration). Alarm A06601 reports that this measurement was interrupted: either the current measurement is defective or a DC current is present during the offset measurement. The alarm value in r2124 tells which of the two conditions applied. Depending on the drive's configuration, the same condition can also be output as a fault instead of an alarm; in that case it is acknowledged immediately by powering up again (POWER ON).
Why it appears
- The current measurement is defective.
- A DC current is present during the offset measurement.
- With alarm value 2, the measured current offset is greater than 3% of the maximum permissible converter current — for example because of a ground fault in the DC link.
What to check
- Read the alarm value in r2124 (interpret it as a decimal number) to determine which condition interrupted the measurement.
- Alarm value 1 — an excessively high phase current has occurred during the current offset calibration: if there is no line contactor, power up an adequately long time before OFF1 = 1.
- Alarm value 2 — the measured current offset is greater than 3% of the maximum permissible converter current: check the DC link for a ground fault.
- If the DC link is free of ground faults, a defective current measurement or a DC current present during the offset measurement remains as the cause.
Reading the message value
The message value carries the alarm value, which the drive stores in r2124; interpret it as a decimal number.
- Alarm value 1:
Excessively high phase current has occurred during the current offset calibration.
- Alarm value 2:
The measured current offset is greater than the 3% of the maximum permissible converter current (e.g. due to a ground fault in the DC link).
Parameters the manual names
- r2124 — alarm value: read the decimal value here to see whether the measurement was interrupted by an excessively high phase current (1) or by an offset above 3% of the maximum permissible converter current (2).
Acknowledging and restarting
As an alarm, the message does not have to be acknowledged. If the drive's configuration outputs the same condition as a fault instead, the fault reaction is NONE (OFF1 and OFF2 are also possible) and the message must be acknowledged immediately — by powering up again (POWER ON).
The same on every family
Every manual that describes A06601 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. 2769 |
The drives this code lives on
A06601 is described for S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does alarm A06601 mean on a SINAMICS infeed?
The current offset calibration was interrupted because the current measurement is defective or a DC current is present during the offset measurement. The alarm value in r2124 shows which of the two conditions applied.
How do I clear A06601 with alarm value 1?
Alarm value 1 means an excessively high phase current occurred during the current offset calibration. If there is no line contactor, power up an adequately long time before OFF1 = 1.
Can A06601 indicate a ground fault?
Yes. With alarm value 2, the measured current offset is greater than 3% of the maximum permissible converter current, for example due to a ground fault in the DC link — so check the DC link for a ground fault.
Does A06601 have to be acknowledged?
Not as an alarm. If the drive outputs the same condition as a fault, it must be acknowledged immediately by powering up again (POWER ON).
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