Error CodecriticalMotor Control
F31100 Encoder fault
In system: Siemens Drive Faults
F31100 indicates encoder fault in Siemens Drive Faults. Use this page to confirm root cause before replacement actions.
Technical Details
Fault ClassMotor Control
Default ReactionDrive trip and output inhibited
AcknowledgeAfter root cause correction and verification
Drive ObjectSiemens Drive Faults
Possible Causes
1Encoder wiring fault
HIGH likelihoodValidate this cause with diagnostic values and wiring/mechanical inspection before replacing parts.
2Incorrect encoder type setup
MEDIUM likelihoodValidate this cause with diagnostic values and wiring/mechanical inspection before replacing parts.
Step-by-Step Solution
1
Action 1
Check feedback cable
Details
- Record measured values before and after this action
2
Action 2
Validate encoder parameters
Details
- Record measured values before and after this action
Diagnostic Parameters
| Parameter | Description | Value/Unit |
|---|---|---|
| r0067 | Motor current | A |
| r0949 | Fault value | Code-specific |
Prevention Tips
Record baseline operating values after commissioning and compare during maintenance.
Review wiring torque, grounding, and cabinet conditions during planned shutdown.
Apply parameter change control to reduce repeat faults after service activities.
Frequently Asked Questions
Structured fault troubleshooting workflow for maintenance teams