What it means
The manuals call this message Encoder 1 DRIVE-CLiQ (CU): Alternating cyclic data transfer error
. F31895 is raised when a DRIVE-CLiQ communication error occurs on the connection from the involved Sensor Module (encoder 1) to the Control Unit (CU). The fault cause coded in the message is 11 (= 0B hex): a synchronization error during alternating cyclic data transfer. Depending on the drive's configuration, the same condition can also be output as an alarm or without a drive reaction. Other Encoder 1 messages - F31885, F31886, F31887, F31896, F31899, F31905, F31912 and F31875 - concern different fault causes on the same encoder connection and have their own pages.
Why it appears
- A DRIVE-CLiQ communication error has occurred from the involved Sensor Module (encoder 1) to the Control Unit.
- Fault cause 11 (= 0B hex): synchronization error during alternating cyclic data transfer.
What to check
- Read the message value in r0949 (fault value) or r2124 (alarm value): it is coded 0000yyxx hex, where yy is the component number and xx the error cause - xx is 11 for this fault.
- Carry out a POWER ON, i.e. switch the drive off and back on again; this is the remedy the manuals give.
- The remedy also refers to p9915 (DRIVE-CLiQ data transfer error shutdown threshold master).
Reading the message value
- The message value contains two items: the component number and the fault cause.
- The drive codes both in one value, readable in r0949 (fault value) or r2124 (alarm value): 0000yyxx hex, where yy = component number and xx = error cause.
- For this fault the error cause is 11 (= 0B hex), the synchronization error during alternating cyclic data transfer.
Parameters the manual names
- r0949 (fault value): holds the coded message value 0000yyxx hex for this fault - the component number and the fault cause.
- r2124 (alarm value): carries the same coding when the condition is issued as an alarm.
- p9915 (DRIVE-CLiQ data transfer error shutdown threshold master): the remedy for this fault refers to this shutdown threshold on the master side.
Acknowledging and restarting
Carry out a POWER ON - switch the drive off and back on again. This is the only remedy the manuals specify; it removes the fault and restarts the drive. No further acknowledgement step is described for this message, and the message value in r0949 shows which component reported the error and with which fault cause.
What differs between the drive families
Straight from the manuals' own fields — F31895 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | Infeed: NONE (OFF1, OFF2) Servo: ENCODER (IASC/DCBRK, NONE) Vector: ENCODER (IASC/DCBRK, NONE) Hla: ENCODER (NONE) | — | Internal (DRIVE-CLiQ) communication error (12) | Sensor Module Encoder 1 | SINAMICS S120, S150 List Manual · p. 3073 |
| G130, G150 | Vector: ENCODER (IASC/DCBRK, NONE) Infeed: NONE (OFF1, OFF2) | IMMEDIATELY | Internal (DRIVE-CLiQ) communication error (12) | Sensor Module Encoder 1 | SINAMICS G130, G150 List Manual · p. 1757 |
The drives this code lives on
F31895 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 F31895 mean on a SINAMICS drive?
It reports a DRIVE-CLiQ communication error between the Sensor Module of encoder 1 and the Control Unit - specifically fault cause 11 (= 0B hex), a synchronization error during alternating cyclic data transfer.
How do I clear fault F31895?
Carry out a POWER ON: switch the drive off and back on again. This is the only remedy the manuals specify, and the fault value in r0949 tells you which component reported the error.
What is coded in the F31895 message value 0000yyxx hex?
yy is the component number and xx the error cause; for this fault xx is 11. You can read the value in r0949, or in r2124 when the condition appears as an alarm.
Can F31895 also appear as an alarm?
Yes. Depending on the drive's configuration, the same condition can also be output as an alarm or without any drive reaction.
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 F31xxx group · SINAMICS manuals · Siemens manuals