What it means
F33801 reports that a DRIVE-CLiQ communication error has occurred between the Control Unit (CU) and encoder 3: the sign-of-life bit is missing from the receive telegram, so the Control Unit no longer receives the encoder's sign-of-life. The message value stored with the fault carries the component number and the fault cause. Depending on how the drive is configured, the same sign-of-life condition can also be output as an alarm or without any reaction.
Why it appears
- The Control Unit has detected a DRIVE-CLiQ communication error on the connection to the encoder involved.
- Fault cause 10 (= 0A hex): the sign-of-life bit in the receive telegram is not set.
What to check
- Check the electrical cabinet design and the cable routing for EMC compliance.
- Replace the component involved.
Reading the message value
- The drive codes the message value in r0949 (fault value) or r2124 (alarm value) as 0000yyxx hex.
- yy is the component number of the component concerned.
- xx is the error cause.
- For this fault the error cause is 10 (= 0A hex), the missing sign-of-life bit in the receive telegram.
Parameters the manual names
- r0949 (fault value): where you read the coded message value — component number and fault cause — when the condition is present as a fault.
- r2124 (alarm value): carries the same coded message value when the condition is output as an alarm.
- p9916 — DRIVE-CLiQ data transfer error shutdown threshold slave (DQ fault slave): the parameter the manual names under "See also" for this fault in the G130/G150 entry.
Acknowledging and restarting
Acknowledge the fault immediately, then restart the drive. If the DRIVE-CLiQ connection to encoder 3 is still disturbed and the sign-of-life bit remains missing, the fault is raised again.
What differs between the drive families
Straight from the manuals' own fields — F33801 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 | Internal (DRIVE-CLiQ) communication error (12) | Control Unit (CU) | SINAMICS S120, S150 List Manual · p. 3164 |
| G130, G150 | OFF1 (IASC/DCBRK, NONE, OFF2, OFF3) | IMMEDIATELY | Internal (DRIVE-CLiQ) communication error (12) | Control Unit (CU) | SINAMICS G130, G150 List Manual · p. 1836 |
The drives this code lives on
F33801 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 F33801 mean on a SINAMICS drive?
It reports a DRIVE-CLiQ communication error from the Control Unit to encoder 3: the sign-of-life bit in the receive telegram is not set (fault cause 10 = 0A hex).
How do I decode the F33801 message value in r0949?
The value is coded 0000yyxx hex: yy is the component number and xx the error cause. For F33801 the error cause is 10 (= 0A hex), the missing sign-of-life bit.
How do I clear fault F33801?
Check the electrical cabinet design and cable routing for EMC compliance and replace the component involved. The fault must then be acknowledged immediately before the drive is restarted.
Can F33801 also appear as an alarm?
Yes. Depending on the drive's configuration, the same sign-of-life condition can be issued as an alarm or without any reaction instead of a fault.
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