F701
Designated Station Error
Mitsubishi Electric · MELSEC Q-series MELSECNET/H
What does F701 mean?
This error indicates a problem with the designated station for communication. It can occur if data is sent to station number 0, if a message is received that was not intended for the host, or if the designated control station is down.
Common Causes
- Data sent to station number 0
- Host station received a message not destined for it
- Designated control station is non-operational (down)
Repair Steps & Checklist
Click steps to track your progress.
- 1
Correct the destination station number in the SEND instruction to a valid, non-zero address
- 2
Verify the station number configuration of the host station to ensure it's receiving intended messages
- 3
Check the operational status and power supply of the designated control station
Verified technical data. Last updated: March 2026
Related Faults
Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H