What it means
F35850 reports that an internal software error has occurred inside a Terminal Module (TM). The fault is described the same way for G130, G150, S120 and S150. The drive stops with a controlled OFF1 stop and stores a fault value in r0949 that identifies which internal error occurred; the value is interpreted as a decimal number.
Why it appears
- An internal software error in the Terminal Module (TM) has occurred.
- With fault value 1: the background time slice is blocked.
- With fault value 2: the checksum over the code memory is not OK.
What to check
- Read the fault value in r0949 (interpret decimal) to see which internal error the Terminal Module detected.
- Replace the Terminal Module (TM).
- If required, upgrade the firmware in the Terminal Module.
- If the fault still occurs afterwards, contact Technical Support.
Reading the message value
- The drive stores the fault value in r0949; interpret it as a decimal number.
- 1: Background time slice is blocked.
- 2: Checksum over the code memory is not OK.
Parameters the manual names
- r0949 — fault value: for F35850, read it as a decimal number to distinguish the two Terminal Module errors (1 = blocked background time slice, 2 = code-memory checksum not OK).
Acknowledging and restarting
The fault is acknowledged by switching the power supply off and on again (POWER ON); acknowledging on the operator panel alone does not clear it. Carry out the remedy first, then power the drive down and up before restarting.
What differs between the drive families
Straight from the manuals' own fields — F35850 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | Infeed: OFF1 (NONE, OFF2) Servo: OFF1 (NONE, OFF2, OFF3) Vector: OFF1 (NONE, OFF2, OFF3) Hla: OFF1 (NONE, OFF2, OFF3) | POWER ON | Hardware/software error (1) | Terminal Module (TM) | SINAMICS S120, S150 List Manual · p. 3236 |
| G130, G150 | Vector: OFF1 (NONE, OFF2, OFF3) Infeed: OFF1 (NONE, OFF2) | POWER ON | Hardware/software error (1) | Terminal Module (TM) | SINAMICS G130, G150 List Manual · p. 1899 |
The drives this code lives on
F35850 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 F35850 mean on a SINAMICS drive?
It reports an internal software error inside a Terminal Module (TM). The fault value in r0949, read as a decimal number, tells which error occurred: 1 = background time slice blocked, 2 = checksum over the code memory not OK.
How do I fix fault F35850?
Replace the Terminal Module (TM) and, if required, upgrade its firmware; if the fault still occurs, contact Technical Support. Then switch the drive power off and on to acknowledge.
How is F35850 acknowledged?
Only by switching the drive supply off and on again (POWER ON). A plain acknowledge on the operator panel does not clear this fault.
Which SINAMICS drives raise F35850?
The code is described for G130, G150, S120 and S150, and on all of them it concerns the Terminal Module (TM).
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 F35xxx group · SINAMICS manuals · Siemens manuals