What it means
A08526 tells you that the drive has no cyclic connection to the higher-level control system — cyclic operation between the drive and its controller has not been established. On the S120, S150, G130 and G150 the message is titled "PN/COMM BOARD: No cyclic connection"; the G120 and G120XA title it "PROFINET: No cyclic connection", and the G115D and G120C manuals list it briefly as "No cyclic connection". The same condition can also be issued as fault F08526 — the drive's configuration decides which form appears.
Why it appears
- The cyclic connection between the drive and the control has not been established (wording of the S120/S150 and G130/G150 manuals).
- No connection to a PROFINET controller exists — the wording used for the PROFINET-titled message on the G120 and G120XA.
What to check
- Establish the cyclic connection and activate the control — on the PROFINET variants, the controller — with cyclic operation.
- For PROFINET, check the parameters "Name of Station" and "IP of Station" (r61000, r61001).
- S120/S150 and G130/G150: if a CBE20 is inserted and PROFIBUS is to communicate via PZD Interface 1, parameterize this using the STARTER commissioning tool or directly using p8839.
Parameters the manual names
- r61000 (PROFINET Name of Station) — the station name that must be checked when this message appears on a PROFINET drive.
- r61001 (PROFINET IP of Station) — the station IP address checked alongside the name for this message.
- p8839 (PZD interface hardware assignment) — on the S120/S150 and G130/G150, the PZD Interface 1 assignment for a CBE20 communicating over PROFIBUS is made here directly or with STARTER.
Acknowledging and restarting
As an alarm, A08526 needs no acknowledgment: it clears by itself once the drive and the control are again exchanging cyclic data. If the condition is issued as fault F08526 instead, the manual for the G130 and G150 requires the acknowledgment to be made immediately; the missing cyclic connection has to be re-established for the drive to keep running.
What differs between the drive families
Straight from the manuals' own fields — A08526 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Communication error to the higher-level control system (9) | None | SINAMICS S120, S150 List Manual · p. 2920 |
| G130, G150 | NONE | NONE | Communication error to the higher-level control system (9) | None | SINAMICS G130, G150 List Manual · p. 1635 |
| G120 | NONE | NONE | Communication error to the higher-level control system (9) | — | SINAMICS G120 · p. 899 |
| G120XA | NONE | NONE | — | — | SINAMICS G120XA PN converter · p. 1149 |
| G115D | — | — | — | — | SINAMICS G115D distributed drive · p. 395 |
| G120C | — | — | — | — | SINAMICS G120C Converters · p. 386 |
The drives this code lives on
A08526 is described for G115D, G120, G120C, G120XA, G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does alarm A08526 mean on a SINAMICS drive?
The drive has no cyclic connection to the higher-level control system. On drives whose manuals title the message "PROFINET: No cyclic connection" (G120, G120XA), it specifically means there is no connection to a PROFINET controller.
How do I fix A08526?
Establish the cyclic connection and activate the control or controller with cyclic operation, and check "Name of Station" (r61000) and "IP of Station" (r61001) for PROFINET. If a CBE20 is inserted and PROFIBUS is to communicate via PZD Interface 1, parameterize this with STARTER or directly using p8839.
Does A08526 have to be acknowledged?
No — as an alarm it needs no acknowledgment and clears itself once cyclic communication is running again. If the condition is configured as fault F08526, the manual for the G130 and G150 requires the acknowledgment to be made immediately.
Which parameters belong to A08526?
For PROFINET, the "Name of Station" (r61000) and "IP of Station" (r61001) are checked. On the S120/S150 and G130/G150, p8839 (PZD interface hardware assignment) is additionally used when a CBE20 must communicate via PZD Interface 1 over PROFIBUS.
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