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. 1

    Correct the low speed link parameters or the low speed parameters specific to each station

  2. 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

Browse all codes in this manual (60)
Verified technical data. Last updated: March 2026

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Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H