PLCS7-1200Verified · sol.ls-electric.com
S7-1200 16#3902 — Diagnostic interrupt OB82
Alarm — operational, inspection needed
CAUSE
Why does it occur?
Diagnostic information was generated by a hardware module — possible wire break, short circuit, or communication fault.
REMEDY · Step by step
How to fix it?
- Analyze the diagnostic data within OB
- Check the affected module's LED and wiring.
Do not reset repeatedly before identifying the cause. Repeated resets while ignoring a trip/alarm can cause secondary damage (IGBT failure, motor winding damage, etc.).
SOURCE
Related manual page
Summary based on the official Siemens AG manual. For accurate and complete information, always consult the official manual.
Open official manual ↗CALLBACK