What it means
F34804 (VSM: CRC) tells you that a checksum error occurred when the program memory on the Voltage Sensing Module (VSM) was read out. The manuals describe the condition identically for all the families listed on this page, so the cause and the remedy below apply to each of them. Depending on how the drive is configured, the same condition can also be signalled as an alarm (A) or as a message with no reaction (N) instead of a fault.
Why it appears
- A checksum error occurred when reading out the program memory on the Voltage Sensing Module (VSM).
What to check
- Check whether the permissible ambient temperature for the component is maintained.
- If the fault remains, replace the Voltage Sensing Module.
Acknowledging and restarting
Once the cause has been removed, acknowledge the fault at the operator panel or in the commissioning tool. The acknowledgement class is IMMEDIATELY, so the message clears as soon as it is acknowledged and the drive can be restarted.
What differs between the drive families
Straight from the manuals' own fields — F34804 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| G130, G150 | Vector: NONE (OFF1, OFF2, OFF3) Infeed: OFF2 (NONE, OFF1) | IMMEDIATELY | Hardware/software error (1) | Voltage Sensing Module (VSM) | SINAMICS G130, G150 List Manual · p. 1856 |
| S120, S150 | Infeed: OFF2 (NONE, OFF1) Vector: NONE (OFF1, OFF2, OFF3) | IMMEDIATELY | Hardware/software error (1) | Voltage Sensing Module (VSM) | SINAMICS S120, S150 List Manual · p. 3185 |
The drives this code lives on
F34804 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 fault F34804 (VSM: CRC) mean on a SINAMICS drive?
A checksum error occurred when the drive read out the program memory on the Voltage Sensing Module (VSM). The manuals describe this condition identically across the listed families.
How do I clear F34804 VSM: CRC?
First check that the permissible ambient temperature for the component is maintained. If the fault persists, replace the Voltage Sensing Module, then acknowledge the fault and restart the drive.
Can F34804 appear as an alarm instead of a fault?
Yes. Depending on the drive's configuration, the same condition can also be issued as an alarm (A) or as a message with no reaction (N).
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 F34xxx group · SINAMICS manuals · Siemens manuals