F7CB
SEND Data Length Out of Range
Mitsubishi Electric · MELSEC Q-series MELSECNET/H
What does F7CB mean?
The specified sent data length for a SEND instruction is outside its permissible setting range. This leads to data transmission errors.
Common Causes
- Sent data length of the SEND instruction is set to a value outside the valid range of 1 to 960 words
Repair Steps & Checklist
Click steps to track your progress.
- 1
Set the sent data length for the SEND instruction to a value within the range of 1 to 960 words
Verified technical data. Last updated: March 2026
Related Faults
Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H