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ErrorLib — Industrial Fault Code Library

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F7C9

Resend Count Out of Range

Mitsubishi Electric · MELSEC Q-series MELSECNET/H

What does F7C9 mean?

The configured resend count for communication attempts is outside its permissible setting range. This prevents proper retry logic for failed transmissions.

Common Causes

  • Resend count is set to a value outside the valid range of 0 to 15 times

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Set the resend count parameter to a value within the range of 0 to 15 times

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