What it means
F33845 reports a DRIVE-CLiQ communication error on the cyclic data transfer between the Control Unit and the encoder involved; on every family that describes this fault, the component concerned is the Sensor Module Encoder 3. The fault cause logged with the message is 11 (= 0B hex): a synchronization error during alternating cyclic data transfer. Depending on how the drive is configured, the same condition can also be output as an alarm (A) or with no reaction (N) instead of a fault.
Why it appears
- A DRIVE-CLiQ communication error has occurred from the Control Unit to the encoder involved (Sensor Module Encoder 3).
- Fault cause 11 (= 0B hex): synchronization error during alternating cyclic data transfer.
What to check
- Before intervening, read the message value so the component number and the fault cause are known: decode the entry in r0949 (or in r2124 if the condition appeared as an alarm) as described below.
- Carry out the remedy the manual gives for this fault:
Carry out a POWER ON (switch-off/switch-on)
.
Reading the message value
- The drive stores two items in the message value: the component number (%1) and the fault cause (%2).
- In r0949/r2124 the information is coded as 0000yyxx hex: yy = component number, xx = error cause.
- Error cause 11 (= 0B hex): synchronization error during alternating cyclic data transfer.
Parameters the manual names
- r0949 — fault value: read it to decode the component number (yy) and the error cause (xx) logged with this fault.
- r2124 — alarm value: carries the same 0000yyxx hex coding when the condition is output as an alarm.
- p9916 — DRIVE-CLiQ data transfer error shutdown threshold, slave (DQ fault slave): the manual cross-references this parameter in connection with this fault.
Acknowledging and restarting
Acknowledge the fault immediately once it appears, and then carry out the prescribed POWER ON (switch-off/switch-on). If the drive outputs the same condition only as an alarm (A) or with no reaction (N), it causes no automatic response and there is nothing to acknowledge.
What differs between the drive families
Straight from the manuals' own fields — F33845 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) | Sensor Module Encoder 3 | SINAMICS S120, S150 List Manual · p. 3170 |
| 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. 1842 |
The drives this code lives on
F33845 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 F33845 mean on a SINAMICS?
It reports a DRIVE-CLiQ communication error on the cyclic data transfer from the Control Unit to the encoder involved, handled as Sensor Module Encoder 3. The logged fault cause 11 (= 0B hex) is a synchronization error during alternating cyclic data transfer.
How do I clear fault F33845?
Acknowledge the fault immediately and then carry out a POWER ON (switch-off/switch-on), which is the remedy the manual gives. Before powering down, read r0949 to note the component number and the fault cause.
What is the message value of F33845?
The drive codes it in r0949 or r2124 as 0000yyxx hex, where yy is the component number and xx is the error cause. For this fault the error cause is 11 (= 0B hex), the synchronization error.
Can F33845 also appear as an alarm?
Yes. Depending on the drive configuration, the same condition can be output as a fault, as an alarm (A) or with no reaction (N); in the alarm and no-reaction variants there is no automatic response and nothing to acknowledge.
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