What it means
The manuals carry this message under the title “Parallel connection: Power units with illegal code numbers”. It is raised when the code numbers of the power units used in a parallel connection are checked and found to be inadmissible: for parallel circuit configurations, only power units with identical power unit data may be used. The manuals print two variants of the cause for the Power Module — in one, the code numbers of the power units are not permissible; in the other, the code numbers of the power units simply do not match. Both variants store the fault value in r0949, where it names the parameter in which the offending code number was detected.
Why it appears
- The code numbers of the power units do not match.
- For booksize drive units: a parallel connection is not possible for the power units being used.
- For booksize drive units: too many power units are being used in the parallel connection.
What to check
- Fit power units that all carry the same code number.
- On booksize drive units, use only power units which are permitted for a parallel connection.
- On booksize drive units, reduce the number of power units being used in the parallel connection.
Reading the message value
- The drive stores the fault value in r0949; it is interpreted as a decimal number.
- In one variant of the message, the value is the parameter in which the inadmissible power unit code number was detected.
- In the other variant, the value is the parameter in which the first different power unit code number was detected.
- The message value shows this parameter as “Parameter: %1”.
Parameters the manual names
- r0949 — fault value: read it as a decimal number to identify the parameter in which the inadmissible (or first different) power unit code number was detected.
Acknowledging and restarting
The drive is switched off (OFF2) by this fault and must be acknowledged before it will start again. First make the parallel configuration permissible: all power units must carry the same code number, and on booksize drive units only units permitted for a parallel connection, in a permitted number, may be used. Once the configuration is corrected, acknowledge the fault and restart the drive.
What differs between the drive families
Straight from the manuals' own fields — F05055 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | OFF2 (NONE) | — | Error in the parameterization / configuration / commissioning procedure (18) | Power Module | SINAMICS S120, S150 List Manual · p. 2749 |
| G130, G150 | OFF2 (NONE) | IMMEDIATELY | Error in the parameterization / configuration / commissioning procedure (18) | Power Module | SINAMICS G130, G150 List Manual · p. 1522 |
| S120, S150 | OFF2 (NONE) | IMMEDIATELY | Error in the parameterization / configuration / commissioning procedure (18) | Power Module | SINAMICS S120, S150 List Manual · p. 2750 |
| G130, G150 | OFF2 (NONE) | IMMEDIATELY | Error in the parameterization / configuration / commissioning procedure (18) | Power Module | SINAMICS G130, G150 List Manual · p. 1522 |
The drives this code lives on
F05055 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 SINAMICS fault F05055 mean?
It means that the code numbers of the power units in a parallel connection are not permissible — for parallel circuit configurations only power units with identical power unit data may be used.
What does the F05055 fault value in r0949 show?
Interpreted as a decimal number, it gives the parameter in which the inadmissible power unit code number was detected; in one variant of the message it is the parameter with the first different code number.
How do I fix fault F05055?
Use power units with the same code number. On booksize drive units, additionally use only units that are permitted for a parallel connection and reduce the number of paralleled units if too many are in use.
Why does F05055 stay present after I acknowledge it?
The message reports a condition of the connected hardware itself: it only goes away permanently once all power units carry the same code number and — on booksize drive units — the parallel connection is permitted for the type and number of units used.
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 F05xxx group · SINAMICS manuals · Siemens manuals