What it means
F34885 reports that cyclic data transfer over DRIVE-CLiQ between the Voltage Sensing Module (VSM) involved and the Control Unit is disturbed: the two nodes do not send and receive in synchronism. The drive stores the component number and the fault cause in the message value, coded in r0949 (fault value) or r2124 (alarm value) as 0000yyxx hex.
Why it appears
- A DRIVE-CLiQ communications error has occurred on the connection from the Voltage Sensing Module (VSM) involved to the Control Unit — the nodes do not send and receive in synchronism.
- Which individual fault raised the message is coded as the fault cause in the message value: 26, 33, 34, 64 or 98 (decoded under fault value below).
What to check
- Read the fault value in r0949 and decode the 0000yyxx hex pattern: yy is the number of the affected component, xx the fault cause.
- Check the power supply voltage of the component involved.
- Carry out a POWER ON (power down, then power up again).
- If the fault persists after this, replace the component involved.
Reading the message value
The message value combines two pieces of information: component number (%1) and fault cause (%2). The drive codes them in r0949 / r2124 as 0000yyxx hex: yy = component number, xx = error cause.
- 26 (= 1A hex): sign-of-life bit in the receive telegram not set and the receive telegram is too early.
- 33 (= 21 hex): the cyclic telegram has not been received.
- 34 (= 22 hex): timeout in the telegram receive list.
- 64 (= 40 hex): timeout in the telegram send list.
- 98 (= 62 hex): error at the transition to cyclic operation.
Parameters the manual names
- r0949 (fault value): holds the coded message value 0000yyxx hex of this fault, from which the component number and the fault cause are read.
- r2124 (alarm value): the manual names it alongside r0949 for the same coded message value of this message.
- p9915 (DRIVE-CLiQ data transfer error shutdown threshold master / DQ fault master): the remedy for this fault cross-references this parameter.
Acknowledging and restarting
The fault is acknowledged immediately. Once the supply voltage has been checked and the POWER ON has been carried out, the drive can run again; if the fault comes back, replace the component involved.
What differs between the drive families
Straight from the manuals' own fields — F34885 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | Infeed: OFF2 (NONE, OFF1) Servo: NONE (OFF1, OFF2) Vector: NONE (OFF1, OFF2) Hla: NONE (OFF1, OFF2) | — | Internal (DRIVE-CLiQ) communication error (12) | Voltage Sensing Module (VSM) | SINAMICS S120, S150 List Manual · p. 3191 |
| G130, G150 | Vector: NONE (OFF1, OFF2) Infeed: OFF2 (NONE, OFF1) | IMMEDIATELY | Internal (DRIVE-CLiQ) communication error (12) | Voltage Sensing Module (VSM) | SINAMICS G130, G150 List Manual · p. 1861 |
The drives this code lives on
F34885 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 F34885 mean?
It reports a cyclic DRIVE-CLiQ data transfer error between the Voltage Sensing Module (VSM) involved and the Control Unit: the nodes do not send and receive in synchronism.
How do I find out which component caused F34885?
Read the fault value in r0949 (the manual names r2124 alongside for the same value). It is coded 0000yyxx hex, where yy is the component number and xx the fault cause.
What does fault cause 33 in F34885 mean?
That the cyclic telegram has not been received. The other causes are 26 (1A hex), 34 (22 hex), 64 (40 hex) and 98 (62 hex), each decoded on this page.
How do I clear fault F34885?
Check the power supply voltage of the affected component, then carry out a POWER ON. If the fault persists, replace the component involved; the fault is acknowledged immediately.
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