Mitsubishi Electric · MELSEC System Q/L Series
This error indicates a system shutdown in a multiple CPU configuration due to a CPU error in a module where 'All station stop by stop error of CPU' is selected. It can also occur if an incompatible CPU module is mounted, or if CPU modules other than CPU No.1 are removed or reset during operation. This fault results in the multiple CPU system stopping.
Click steps to track your progress.
Use the programming tool to read the individual error information, identify the specific error of the CPU module, and address its root cause.
Remove any CPU module identified as incompatible with the multiple CPU system from the main base unit.
Inspect the mounting status of all CPU modules, especially verifying that CPU modules other than CPU No.1 are correctly installed and powered.
Check system logs to confirm whether CPU modules (other than CPU No.1) were reset inadvertently.