Siemens SINAMICS G120 Error Code F07901

Siemens PLC & VFD Major Motor

Model: SINAMICS G120 | Code: F07901

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

Symptoms

Motor out of step: synchronous motor lost synchronization.

Possible Causes

  • Load torque too high
  • Field weakening too aggressive
  • Encoder feedback fault

Troubleshooting Steps

  1. Step 1: Reduce load torque
    Motor maintains synchronization
  2. Step 2: Adjust field weakening parameters
    Parameters optimized
  3. Step 3: Check encoder feedback
    Signal stable

How to Reset

Reset via operator panel after motor resynchronizes.

Related Siemens Fault Codes

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Source: Siemens SINAMICS G120 List Manual

Category: PLC & VFD