F803

Group Number Error / Station Number Error

Mitsubishi Electric · MELSEC Q-series MELSECNET/H

What does F803 mean?

A group number or station number error has been detected, typically due to incorrect hardware setting switches or parameter configurations. This prevents proper addressing on the network.

Common Causes

  • Incorrect hardware setting switch (e.g., DIP switch) configuration for group or station number
  • Incorrect group number or station number specified in parameters

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Correct the physical hardware setting switch positions (e.g., DIP switches) related to group or station numbers

  2. 2

    Verify and correct the parameter settings for group or station numbers

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

Related Faults

Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H