Siemens SINAMICS G120 Error Code F31106

Siemens PLC & VFD Major Encoder

Model: SINAMICS G120 | Code: F31106

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

Symptoms

Encoder communication fault: digital encoder link error.

Possible Causes

  • Encoder communication cable fault
  • Encoder protocol mismatch
  • Encoder power supply fault

Troubleshooting Steps

  1. Step 1: Check encoder communication cable
    Cable intact
  2. Step 2: Verify protocol settings
    Settings match encoder
  3. Step 3: Check encoder power supply
    Voltage within spec

How to Reset

Reset via operator panel after encoder communication is restored.

Related Siemens Fault Codes

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Source: Siemens SINAMICS G120 List Manual

Category: PLC & VFD