What it means
F05064 reports that the pulse synchronization of at least one of the power units connected in parallel is incorrect. In a parallel connection the power units must pulse in step, and the fault says that one of them no longer does. Because the cause speaks of «at least one» power unit, the code alone does not identify which of the parallel-connected units is affected. The drive trips when the fault occurs and will not run again until the fault has been acknowledged.
Why it appears
- The pulse synchronization of at least one of the power units connected in parallel is incorrect — the affected power unit no longer pulses in step with the other units in the parallel connection.
What to check
- Restart the drive system: switch the drive power off and on again. This is the only remedy the manual gives for F05064 — it names no further checks, measurements or parameters for this fault.
Acknowledging and restarting
This fault is cleared by cycling the drive power, not by a simple acknowledge from the operator panel: the drive only accepts the acknowledge once the power has been switched off and on, and the manual marks it so that the acknowledge should happen immediately. This matches the remedy — restarting the drive system — so power the drive down, power it up again, and the fault is acknowledged; the drive can then be started again.
What differs between the drive families
Straight from the manuals' own fields — F05064 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | Infeed: OFF2 (OFF1) Vector: OFF2 (OFF1, OFF3) | POWER ON (IMMEDIATELY) | General drive fault (19) | Power Module | SINAMICS S120, S150 List Manual · p. 2752 |
| G130, G150 | OFF2 (OFF1, OFF3) | POWER ON (IMMEDIATELY) | General drive fault (19) | Power Module | SINAMICS G130, G150 List Manual · p. 1524 |
The drives this code lives on
F05064 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 F05064 mean?
The pulse synchronization of at least one of the power units connected in parallel is incorrect — the affected unit no longer pulses in step with the others, and the drive trips.
How do I fix fault F05064?
The manual's remedy is to restart the drive system: switch the drive power off and on again. No other checks, measurements or parameters are given for this fault.
Why does F05064 not clear when I acknowledge it on the panel?
This fault requires a power-cycle acknowledge: it only clears after the drive power has been switched off and on. Switch the power off, then on, and acknowledge immediately.
Does F05064 tell me which parallel power unit is faulty?
No. The cause states that at least one of the power units connected in parallel has incorrect pulse synchronization, but the code does not identify which one.
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