What it means
F08702 means that the monitoring time of the CANopen RPDO telegram has expired: the drive has not received this telegram from its CANopen master within the monitoring time. The manuals give two reasons for this — the bus connection was interrupted, or the CANopen master was switched off. Depending on the drive's configuration, the same condition can also be issued as an alarm (A).
Why it appears
- The bus connection was interrupted, so the CANopen RPDO telegram no longer arrives within its monitoring time.
- The CANopen master was switched off.
What to check
- Check the bus cable — an interrupted bus connection is one of the causes named for this fault.
- Check the master — the fault also occurs when the CANopen master has been switched off.
- If required, increase the RPDO monitoring time in p8699.
Parameters the manual names
- p8699 (CAN: RPDO monitoring time, RPDO t_mon) — the RPDO monitoring time whose expiry raises F08702; if required, increase it as part of the remedy.
Acknowledging and restarting
Once the bus connection or the master has been restored (and p8699 adjusted if required), acknowledge the fault — acknowledgment must be immediate — and restart the drive.
What differs between the drive families
Straight from the manuals' own fields — F08702 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | Infeed: OFF2 (NONE, OFF1) Servo: OFF3 (NONE, OFF1, OFF2) Vector: OFF3 (NONE, OFF1, OFF2) Hla: OFF3 (NONE, OFF1, OFF2) | IMMEDIATELY | Communication error to the higher-level control system (9) | None | SINAMICS S120, S150 List Manual · p. 2926 |
| G130, G150 | Vector: OFF3 (NONE, OFF1, OFF2) Infeed: OFF2 (NONE, OFF1) | IMMEDIATELY | Communication error to the higher-level control system (9) | None | SINAMICS G130, G150 List Manual · p. 1640 |
| G120 | OFF3 (NONE, OFF1, OFF2) | IMMEDIATELY | Communication error to the higher-level control system (9) | — | SINAMICS G120 · p. 900 |
The drives this code lives on
F08702 is described for G120, G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does fault F08702 mean on a SINAMICS drive?
The monitoring time of the CANopen RPDO telegram has expired: the drive no longer receives this telegram because the bus connection was interrupted or the CANopen master was switched off.
How do I clear fault F08702?
Check the bus cable and check the master. If required, increase the monitoring time in p8699, then acknowledge the fault immediately.
Why does p8699 matter for F08702?
p8699 is the CAN RPDO monitoring time; F08702 is raised when this time expires, and increasing it is part of the remedy if required.
Can F08702 also appear as an alarm?
Yes — depending on the drive's configuration, the same condition can also be issued as an alarm (A).
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 F08xxx group · SINAMICS manuals · Siemens manuals