Siemens SINAMICS G120 Error Code F07906

Siemens PLC & VFD Major Motor

Model: SINAMICS G120 | Code: F07906

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

Symptoms

Motor detection signal lost: feedback signal dropout.

Possible Causes

  • Motor feedback cable fault
  • Feedback sensor failure
  • Signal interference

Troubleshooting Steps

  1. Step 1: Check feedback cable
    Cable intact
  2. Step 2: Verify feedback sensor
    Sensor operational
  3. Step 3: Eliminate EMI
    No signal interference

How to Reset

Reset via operator panel after feedback is restored.

Related Siemens Fault Codes

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Source: Siemens SINAMICS G120 List Manual

Category: PLC & VFD