Applicable Systems
Modicon M221
Modicon M241
Modicon M251
Modicon M340
Modicon M580
Altivar
Symptoms
Safety function fault detected.
Possible Causes
- Safety input fault
- Safety relay fault
- Safety wiring fault
Troubleshooting Steps
- Step 1: Check safety input signal
Signal normal - Step 2: Verify safety relay
Relay functional - Step 3: Inspect safety wiring
Wiring intact
How to Reset
Reset via control panel after safety function is restored.
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Source: Schneider Electric ATV320 Programming Manual
Category: PLC & VFD
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