Siemens SINAMICS G120 Error Code F31169

Siemens PLC & VFD Major Encoder

Model: SINAMICS G120 | Code: F31169

Applicable Systems
S7-1200 S7-1500 S7-300 S7-400 LOGO! SINAMICS

Symptoms

Encoder runtime fault: encoder fault during operation.

Possible Causes

  • Encoder signal lost during running
  • Encoder hardware degradation
  • Transient signal dropout

Troubleshooting Steps

  1. Step 1: Check encoder signal during operation
    Signal stable
  2. Step 2: Inspect encoder hardware
    No physical damage
  3. Step 3: Replace encoder if fault recurs
    New encoder operates correctly

How to Reset

Reset via operator panel after encoder runtime fault is resolved.

Related Siemens Fault Codes

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Source: Siemens SINAMICS G120 List Manual

Category: PLC & VFD