1415
CONTROL-BUS ERR.
Mitsubishi Electric · MELSEC System Q/L Series
What does 1415 mean?
An error is detected on the system bus. This indicates a communication or integrity issue within the system's internal data highway. It can also signify a fault of the main or extension base unit.
Common Causes
- An error is detected on the system bus.
- Fault of the main or extension base unit was detected.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Reset the CPU module and RUN it again. If the same error is displayed again, the intelligent function module, CPU module or base unit is faulty.
Verified technical data. Last updated: March 2026
Related Faults
Source: Mitsubishi Electric MELSEC System Q/L Series