Siemens SINAMICS G120 Error Code F31144

Siemens PLC & VFD Major Encoder

Model: SINAMICS G120 | Code: F31144

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

Symptoms

Encoder initialization fault: encoder failed to initialize.

Possible Causes

  • Encoder hardware failure
  • Initialization timeout
  • Encoder not connected

Troubleshooting Steps

  1. Step 1: Check encoder connection
    Encoder connected
  2. Step 2: Verify encoder power supply
    Voltage within spec
  3. Step 3: Restart encoder initialization
    Initialization completes

How to Reset

Reset via operator panel after encoder initializes successfully.

Related Siemens Fault Codes

Source: Siemens SINAMICS G120 List Manual

Category: PLC & VFD