PLCS7-1200Verified · sol.ls-electric.com
S7-1200 16#2942 — I/O access error - read
Trip — immediate stop
CAUSE
Why does it occur?
The CPU failed to read from an I/O module — possible causes: module not installed, communication loss, or address conflict.
REMEDY · Step by step
How to fix it?
Verify that the hardware configuration matches, check the module LED status, and re-secure the backplane connection.
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