Applicable Systems
Modicon M221
Modicon M241
Modicon M251
Modicon M340
Modicon M580
Altivar
Symptoms
Frequency reference fault detected.
Possible Causes
- Frequency reference signal lost
- Reference source misconfigured
- Signal cable fault
Troubleshooting Steps
- Step 1: Check frequency reference signal
Signal present - Step 2: Verify reference source configuration
Source correct - Step 3: Inspect signal cable
Cable intact
How to Reset
Reset via control panel after reference is restored.
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Source: Schneider Electric ATV320 Programming Manual
Category: PLC & VFD
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