PLCS7-1200Verified · sol.ls-electric.com
S7-1200 LED-RUN-BLINK — RUN/STOP LED blinking
Warning — monitor· AUTO-RESET
CAUSE
Why does it occur?
CPU is in the STARTUP phase or a firmware update is in progress.
REMEDY · Step by step
How to fix it?
If blinking persists, check the mode selector position, forced STOP conditions, and firmware update status.
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