Applicable Systems
Modicon M221
Modicon M241
Modicon M251
Modicon M340
Modicon M580
Altivar
Symptoms
Software fault: internal software error detected.
Possible Causes
- Firmware bug
- Internal software error
- Memory corruption
Troubleshooting Steps
- Step 1: Power cycle the drive
Fault may clear if transient - Step 2: Update firmware
Firmware current - Step 3: Replace control board if persistent
New board initializes correctly
How to Reset
Reset via control panel after software error is resolved.
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Source: Schneider Electric ATV320 Programming Manual
Category: PLC & VFD
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