What it means
F30651 (SI P2: Synchronization with Control Unit unsuccessful) is raised by the drive-integrated “Safety Integrated” function when it fails to synchronize the safety time slices in both monitoring channels — on the G120, between processor 1 and processor 2. Because the monitoring channels are no longer running in step, the fault brings the drive into a STOP A that cannot be acknowledged, and the drive only returns to a usable state once the power has been removed and restored.
Why it appears
- The drive-integrated “Safety Integrated” function requires the safety time slices to be synchronized in both monitoring channels (on the G120: on processor 1 and processor 2), and this synchronization routine was unsuccessful.
What to check
- Carry out a POWER ON (switch-off/switch-on) for all components. On the G120 the manual names this power-up as the only remedy.
- If the fault recurs, upgrade the Motor Module/Hydraulic Module software.
- Upgrade the Control Unit software as well.
Reading the message value
- The drive writes the fault value to r0949; interpret it as a decimal number.
- The manual provides no decoding for the technician: the value is only for internal Siemens troubleshooting.
- The abbreviations accompanying the value mean MM: Motor Module and SI: Safety Integrated.
Parameters the manual names
- r0949 — holds the fault value of F30651, to be interpreted decimal; for this code the manual assigns it no meaning beyond internal Siemens troubleshooting.
Acknowledging and restarting
A normal acknowledgement does not clear this fault: the manual states that it results in a STOP A that cannot be acknowledged. Power all components down and back up (POWER ON). If F30651 reappears afterwards, update the Motor Module/Hydraulic Module software and the Control Unit software as described under checks.
What differs between the drive families
Straight from the manuals' own fields — F30651 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | OFF2 | IMMEDIATELY (POWER ON) | Hardware/software error (1) | None | SINAMICS S120, S150 List Manual · p. 2982 |
| G130, G150 | OFF2 | IMMEDIATELY (POWER ON) | Hardware/software error (1) | None | SINAMICS G130, G150 List Manual · p. 1682 |
| G120 | OFF2 | IMMEDIATELY (POWER ON) | Hardware/software error (1) | — | SINAMICS G120 · p. 922 |
The drives this code lives on
F30651 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 F30651 mean on a SINAMICS drive?
The drive-integrated Safety Integrated function could not synchronize the safety time slices in both monitoring channels — on the G120, between processor 1 and processor 2 — so the drive goes to a STOP A.
How do I clear fault F30651?
It cannot be acknowledged normally, because it produces a STOP A that cannot be acknowledged. Switch all components off and on again (POWER ON); if it returns, upgrade the Motor Module/Hydraulic Module software and the Control Unit software.
What fault value does F30651 show in r0949?
Read r0949 interpreted as decimal. The manual gives no decoding: it marks the value as only for internal Siemens troubleshooting, with MM meaning Motor Module and SI meaning Safety Integrated.
Why does F30651 come back after a POWER ON?
Then the manual's remaining remedies are software upgrades: update the Motor Module/Hydraulic Module software and the Control Unit software.
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 F30xxx group · SINAMICS manuals · Siemens manuals