Siemens SINAMICS G120 Error Code F07902

Siemens PLC & VFD Critical Motor

Model: SINAMICS G120 | Code: F07902

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

Symptoms

Motor overspeed: actual speed exceeds maximum setpoint.

Possible Causes

  • Load driven by process
  • Speed feedback fault
  • Control loop instability

Troubleshooting Steps

  1. Step 1: Check for driven load
    No external driving force
  2. Step 2: Verify speed feedback signal
    Signal accurate
  3. Step 3: Tune speed controller
    Controller stable

How to Reset

Reset via operator panel after speed is controlled.

Related Siemens Fault Codes

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Source: Siemens SINAMICS G120 List Manual

Category: PLC & VFD