Applicable Systems
Modicon M221
Modicon M241
Modicon M251
Modicon M340
Modicon M580
Altivar
Symptoms
Safety fault: safety function failure detected.
Possible Causes
- Safety function hardware fault
- Safety relay failure
- Safety configuration error
Troubleshooting Steps
- Step 1: Check safety hardware
Hardware functional - Step 2: Verify safety relay
Relay operational - Step 3: Verify safety configuration
Configuration correct
How to Reset
Reset via control panel after safety function is repaired.
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Source: Schneider Electric ATV320 Programming Manual
Category: PLC & VFD
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