What it means
F33805 tells you that the drive has detected corrupted data in the EEPROM of the module for Encoder 3: the internal parameter data stored there no longer passes its checksum. The fault value in r0949 distinguishes the two ways in which the module reports this corruption. Depending on how the drive is configured, the same condition can also be output as an alarm (A) or without any reaction (N).
Why it appears
- The internal parameter data stored in the EEPROM of the Encoder 3 module is corrupted.
- Depending on the fault value, the corruption shows up either as an EEPROM access error (01) or as too many blocks in the EEPROM (02).
What to check
- Read the fault value in r0949 — interpret it hexadecimal — to determine whether the module reported an EEPROM access error (01) or too many blocks in the EEPROM (02).
- Replace the module.
Replace the module.
is the only remedy the manual gives, for either fault value; it describes no repair. - Acknowledge the fault immediately afterwards; the drive is then ready to be restarted.
Reading the message value
- The drive puts the fault value into the message value (%1); the same value is stored in r0949 and must be interpreted hexadecimal.
- 01: EEPROM access error.
- 02: Too many blocks in the EEPROM.
Parameters the manual names
- r0949 — read the fault value of F33805 here and interpret it hexadecimal to see which of the two EEPROM problems (01, 02) the Encoder 3 module reported.
Acknowledging and restarting
Acknowledgement is specified as IMMEDIATELY: after the defective module has been replaced, acknowledge the fault and restart the drive. For the alarm (A) and no-reaction (N) variants of this condition, the manual specifies no reaction and no acknowledgement.
What differs between the drive families
Straight from the manuals' own fields — F33805 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | Servo: OFF1 (IASC/DCBRK, NONE, OFF2, OFF3) Vector: OFF1 (IASC/DCBRK, NONE, OFF2, OFF3) Hla: OFF1 (NONE, OFF2, OFF3) | IMMEDIATELY | Hardware/software error (1) | Sensor Module Encoder 3 | SINAMICS S120, S150 List Manual · p. 3166 |
| G130, G150 | OFF1 (IASC/DCBRK, NONE, OFF2, OFF3) | IMMEDIATELY | Hardware/software error (1) | Sensor Module Encoder 3 | SINAMICS G130, G150 List Manual · p. 1837 |
The drives this code lives on
F33805 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 F33805 mean on a SINAMICS drive?
The drive has found corrupted parameter data in the EEPROM of the module for Encoder 3 — the stored data no longer passes its checksum. The fault value in r0949 shows whether it was an EEPROM access error (01) or too many blocks in the EEPROM (02).
How is F33805 cleared?
The manual's only remedy is to replace the module; it names no repair for either fault value. Afterwards the fault must be acknowledged immediately before the drive is restarted.
Can F33805 also appear as an alarm?
Yes. Depending on the drive's configuration, the same condition can be output as an alarm (A) or with no reaction at all (N); for both variants the manual specifies no reaction and no acknowledgement.
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 F33xxx group · SINAMICS manuals · Siemens manuals