What it means
F33405 is raised when the drive detects an inadmissibly high temperature in the encoder electronics or in the encoder evaluation of Encoder 3 — the evaluation used for a motor with DRIVE-CLiQ. The G130/G150 manual states the fault threshold as 125 °C; the temperature measured at the moment of the fault is stored in the fault value r0949 in 0.1 °C. Depending on the drive configuration, the same condition can also be signalled as an alarm (A) or as a message without reaction (N); for those variants the manual specifies neither a reaction nor an acknowledgement.
Why it appears
- An inadmissibly high temperature was detected in the encoder electronics or in the encoder evaluation.
- The evaluation belongs to a motor with DRIVE-CLiQ; on G130/G150 the manual names the fault threshold as 125 °C.
What to check
- Read the fault value in r0949 to see how hot the evaluation was when the drive tripped; the two manuals encode it differently, see the decoding below.
- Reduce the ambient temperature for the DRIVE-CLiQ connection of the motor — this is the remedy the manuals give for this fault.
- Once the temperature at the encoder has dropped, acknowledge the fault immediately so the drive can be started again.
Reading the message value
- S120/S150: r0949 is interpreted hexadecimal: yyxxxx hex, where yy is the temperature sensor number and xxxx the measured module temperature in 0.1 °C. The message value correspondingly carries the temperature in 0.1 °C and the temperature sensor number.
- G130/G150: r0949 is interpreted decimal and contains the measured board/module temperature in 0.1 °C.
Parameters the manual names
- r0949 — fault value: for this fault read the measured temperature of the encoder evaluation from it, in 0.1 °C; on S120/S150 the value also identifies the temperature sensor (yy in yyxxxx hex).
Acknowledging and restarting
Acknowledge the fault immediately once the cause has been removed — the manuals specify acknowledgement IMMEDIATELY (POWER ON), so a POWER ON is also an acknowledgement path. If the drive is configured to signal the same condition only as an alarm (A) or without reaction (N), neither a reaction nor an acknowledgement is specified.
What differs between the drive families
Straight from the manuals' own fields — F33405 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | Servo: OFF1 (IASC/DCBRK, NONE, OFF2, OFF3, STOP2) Vector: OFF1 (IASC/DCBRK, NONE, OFF2, OFF3, STOP2) Hla: OFF1 (NONE, OFF2, OFF3, STOP2) | IMMEDIATELY (POWER ON) | Actual position/speed value incorrect or not available (11) | Sensor Module Encoder 3 | SINAMICS S120, S150 List Manual · p. 3153 |
| G130, G150 | OFF1 (IASC/DCBRK, NONE, OFF2, OFF3, STOP2) | IMMEDIATELY (POWER ON) | Actual position/speed value incorrect or not available (11) | Sensor Module Encoder 3 | SINAMICS G130, G150 List Manual · p. 1825 |
The drives this code lives on
F33405 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 F33405 on my SINAMICS drive mean?
Encoder 3 has reported an inadmissible temperature in its encoder evaluation or electronics, for a motor with DRIVE-CLiQ. On G130/G150 the fault threshold is 125 °C, and the measured temperature is stored in r0949 in 0.1 °C.
How do I clear fault F33405?
Reduce the ambient temperature for the DRIVE-CLiQ connection of the motor, then acknowledge the fault immediately — the manuals specify IMMEDIATELY (POWER ON).
Where can I read the temperature that triggered F33405?
In the fault value r0949. On S120/S150 it is coded yyxxxx hex — yy is the temperature sensor number and xxxx the temperature in 0.1 °C; on G130/G150 it is the decimal temperature in 0.1 °C.
Does F33405 always shut the drive down?
No. Depending on the configuration the drive can also raise it as an alarm (A) or as a message without reaction (N); for those variants the manual specifies neither a reaction nor an 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