What it means
F33887 means that a fault has been detected on the DRIVE-CLiQ component involved, namely the Sensor Module for encoder 3 evaluated at the CU. Faulty hardware cannot be excluded. Which of the possible fault causes applies is coded in the message value. Depending on how the drive is configured, the same condition can also be signalled as an alarm or with no reaction at all.
Why it appears
- A fault was detected on the DRIVE-CLiQ component involved, the Sensor Module for encoder 3; faulty hardware cannot be excluded.
- Fault cause 32 (= 20 hex): error in the telegram header.
- Fault cause 35 (= 23 hex): receive error — the telegram buffer memory contains an error.
- Fault cause 66 (= 42 hex): send error — the telegram buffer memory contains an error.
- Fault cause 67 (= 43 hex): send error — the telegram buffer memory contains an error.
- Fault cause 96 (= 60 hex): response received too late during runtime measurement.
- Fault cause 97 (= 61 hex): time taken to exchange characteristic data too long.
What to check
- Check the DRIVE-CLiQ wiring for an interrupted cable, contacts and the like.
- Check the electrical cabinet design and the cable routing for EMC compliance.
- If required, use another DRIVE-CLiQ socket (p9904).
- Replace the component involved.
Reading the message value
- The drive enters the component number (%1) and the fault cause (%2) into the message value, which is stored in r0949 for a fault and in r2124 when the condition is signalled as an alarm.
- The coding is 0000yyxx hex, where yy = component number and xx = error cause; match the value of xx against the fault causes listed above.
Parameters the manual names
- r0949 (fault value): read the coded message value 0000yyxx hex here to see the component number and fault cause of F33887.
- r2124 (alarm value): holds the same coding when the condition is output as an alarm.
- p9904 (topology comparison acknowledge differences): named by the remedy if the connection has to be moved to another DRIVE-CLiQ socket.
Acknowledging and restarting
Acknowledge the fault immediately. The fault reaction brings the drive to a standstill (OFF1), and the converter will only start again once the fault has been acknowledged and a new ON command is issued.
What differs between the drive families
Straight from the manuals' own fields — F33887 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) | — | Internal (DRIVE-CLiQ) communication error (12) | Sensor Module Encoder 3 | SINAMICS S120, S150 List Manual · p. 3174 |
| G130, G150 | OFF1 (IASC/DCBRK, NONE, OFF2, OFF3) | IMMEDIATELY | Internal (DRIVE-CLiQ) communication error (12) | Sensor Module Encoder 3 | SINAMICS G130, G150 List Manual · p. 1845 |
The drives this code lives on
F33887 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 F33887 mean on a SINAMICS drive?
It reports a component fault on the DRIVE-CLiQ link for encoder 3: the CU detected a fault on the Sensor Module for encoder 3, and faulty hardware cannot be excluded. The coded fault cause in r0949 tells you what exactly went wrong.
How do I decode the fault value of F33887?
Read r0949, or r2124 if the message came as an alarm. The value is coded 0000yyxx hex, where yy is the component number and xx the fault cause — for example 20 hex for a telegram header error or 60 hex for a response that arrived too late during runtime measurement.
How is F33887 fixed?
Check the DRIVE-CLiQ wiring for interrupted cables or poor contacts, check the cabinet design and cable routing for EMC compliance, use another DRIVE-CLiQ socket (p9904) if required, and replace the component involved if the fault persists.
Can F33887 also appear as an alarm?
Yes. Depending on the drive's configuration, the same condition can be output with no reaction or as an alarm, in which case the value is stored in r2124 instead of r0949.
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