1150
RAM ERROR
Mitsubishi Electric · MELSEC System Q/L Series
What does 1150 mean?
The memory of the CPU module in the Multiple CPU high speed transmission area is faulty. This indicates a problem with memory designated for inter-CPU communication in high-speed multi-CPU systems, affecting data exchange.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Take noise reduction measures.
- 2
Reset the CPU module and RUN it again. If the same error is displayed again, this suggests a CPU module hardware fault.
Verified technical data. Last updated: March 2026
Related Faults
Source: Mitsubishi Electric MELSEC System Q/L Series