What it means
A08550 is raised when the assignment of the hardware to the PZD interface has been parameterized incorrectly. The alarm value tells you which of four specific assignment errors the drive has detected, and the parameter p8839 (PZD interface hardware assignment) holds the assignment concerned.
Why it appears
- Exactly one of the two indices deviates from 99 (automatic).
- Both PZD interfaces have been assigned to the same hardware.
- The assigned COMM BOARD is missing.
- A CBC10 has been assigned to interface 1.
What to check
- Read the alarm value in r2124, interpreting it as a decimal number, to identify which of the four assignment errors the drive has detected.
- Check the hardware assignment of the PZD interface in p8839.
- If required, correct the assignment in p8839.
Reading the message value
The drive stores the alarm value in r2124; interpret it as a decimal number. The value identifies the detected error:
- 1: Only one of the two indices is not equal to 99 (automatic).
- 2: Both PZD interfaces are assigned to the same hardware.
- 3: Assigned COMM BOARD missing.
- 4: CBC10 is assigned to interface 1.
Parameters the manual names
- p8839 — PZD interface hardware assignment: the parameter in which the assignment named by this alarm is set; check it and correct it here to remedy A08550.
- r2124 — alarm value: read it here, interpreted as a decimal number, to see which of the four errors (1–4) triggered A08550.
Acknowledging and restarting
No acknowledgement is required for this alarm. The remedy is to check the hardware assignment of the PZD interface in p8839 and, if required, correct it there.
What differs between the drive families
Straight from the manuals' own fields — A08550 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | — | — | Error in the parameterization / configuration / commissioning procedure (18) | None | SINAMICS S120, S150 List Manual · p. 2921 |
| G130, G150 | NONE | NONE | Error in the parameterization / configuration / commissioning procedure (18) | None | SINAMICS G130, G150 List Manual · p. 1636 |
The drives this code lives on
A08550 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 A08550 mean on a SINAMICS drive?
The drive has detected that the assignment of the hardware to the PZD interface is parameterized incorrectly. The alarm value shows which of four assignment errors applies — for example both PZD interfaces assigned to the same hardware or the assigned COMM BOARD missing.
How do I fix alarm A08550?
Read the alarm value in r2124 as a decimal number to see which of the four conditions was detected, then check the assignment in p8839 and correct it there if required.
Does A08550 have to be acknowledged?
No. The manual lists no acknowledgement for this alarm; the remedy is to correct the hardware assignment in p8839.
What is p8839?
p8839 is the PZD interface hardware assignment parameter. A08550 is raised when this assignment is incorrect, and checking and correcting it in p8839 is the remedy the manual gives.
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 A08xxx group · SINAMICS manuals · Siemens manuals