What it means
F33502 reports that the encoder fitted with measuring gear, which the drive evaluates as Encoder 3, no longer provides any valid signals. The drive therefore receives no usable actual values from this encoder. Depending on how the drive is configured, the same condition can also be reported as an alarm or as a message without any reaction rather than as this fault.
Why it appears
- The encoder with the mounted measuring gear has stopped delivering valid signals, so no usable actual value reaches the drive from Encoder 3.
What to check
- Make sure that every encoder with its mounted measuring gear provides valid actual values while the drive is in operation. The manual names no other remedy for this message.
Acknowledging and restarting
The fault must be acknowledged immediately; once it has been acknowledged, the drive can be put back into operation. Where the condition is configured as an alarm (A) or as a message without reaction (N), the manual specifies neither a reaction nor an acknowledgement.
The same on every family
Every manual that describes F33502 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | OFF1 (OFF2, OFF3) | IMMEDIATELY | Actual position/speed value incorrect or not available (11) | Sensor Module Encoder 3 | SINAMICS S120, S150 List Manual · p. 3163 |
| G130, G150 | OFF1 (OFF2, OFF3) | IMMEDIATELY | Actual position/speed value incorrect or not available (11) | Sensor Module Encoder 3 | SINAMICS G130, G150 List Manual · p. 1835 |
The drives this code lives on
F33502 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 F33502 mean?
It means the encoder with measuring gear that the drive reads as Encoder 3 no longer provides any valid signals, so the drive gets no usable actual values from this encoder.
How do I fix fault F33502?
Ensure that all encoders with mounted measuring gear provide valid actual values in operation, then acknowledge the fault immediately. The manual names no other remedy.
Can F33502 also appear as an alarm?
Yes. Depending on the drive configuration, the same condition can also be issued as an alarm (A) or as a message without any reaction (N).
Is F33502 the same on G130, G150, S120 and S150?
Yes. Both manuals describe the message with the same cause, the same remedy and the same immediate 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