PLCS7-1200Verified · sol.ls-electric.com
S7-1200 16#4501 — Memory card protect
Alarm — operational, inspection needed
CAUSE
Why does it occur?
MC is write-protected or password-protected and cannot be modified.
REMEDY · Step by step
How to fix it?
Release the card's write-protect switch and check the project password.
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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