PLCS7-1200Verified · sol.ls-electric.com
S7-1200 16#4502 — Memory card removed
Trip — immediate stop
CAUSE
Why does it occur?
SIMATIC MC removed while the CPU was running.
REMEDY · Step by step
How to fix it?
- Only remove/insert the card with power OFF
- Reinsert the card and reboot
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.
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