Mitsubishi Electric · MELSEC System Q/L Series
This error occurs in multiple CPU systems due to incorrect placement of CPU modules. It is triggered by empty slots existing between a QCPU and another QCPU or motion controller. Additionally, mounting any module other than a High-performance model QCPU/Process CPU (including motion controllers) to the left of a High-performance model QCPU/Process CPU will also cause this error. The CPU will stop operation.
Click steps to track your progress.
Mount modules into all available slots such that any empty slots are located to the right-hand side of the CPU module.
Remove any incorrect module mounted to the left of a High-performance model QCPU/Process CPU.
Mount the High-performance model QCPU/Process CPU on an empty slot, ensuring the motion CPU is mounted to its right-hand side.