F842
Low Speed Consistency Error
Mitsubishi Electric · MELSEC Q-series MELSECNET/H
What does F842 mean?
A consistency error has been detected in the low speed link parameters or low speed parameters specific to a station. This is often related to parameter size, where specific parameters exceed common parameters.
Common Causes
- Inconsistent parameter sizes where the word number of specific low speed parameters is greater than the word number of common low speed parameters
Repair Steps & Checklist
Click steps to track your progress.
- 1
Correct the low speed link parameters or the low speed parameters specific to each station
- 2
Adjust parameter sizes to ensure that the word number of specific parameters is less than or equal to the word number of common parameters
Verified technical data. Last updated: March 2026
Related Faults
Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H