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ErrorLib — Industrial Fault Code Library

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F7C7

Host Station Number as Target

Mitsubishi Electric · MELSEC Q-series MELSECNET/H

What does F7C7 mean?

The host station's own station number has been specified as the target station number in a communication instruction. This creates a self-targeting loop error.

Common Causes

  • Incorrect configuration of the target station number, where it matches the host station's own number

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Modify the target station number to be a different value than the host station's own number

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

Related Faults

F105Initial Status with Baton/Data Link IssueF106Control/Sub-control Station Shift StatusF107Baton Pass Error (Baton Lost)
Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H
Open Manual (Page 162)Search more codes in this manual