F70B
Response Wait Timeout
Mitsubishi Electric · MELSEC Q-series MELSECNET/H
What does F70B mean?
A response to a communication request was not received within the expected waiting period, leading to a timeout error. This is a general communication issue.
Common Causes
- Delays in network response
- Network congestion
- Issues with the responding station
Repair Steps & Checklist
Click steps to track your progress.
- 1
Retry the communication instruction after a short interval
- 2
If the error persists, investigate network latency or the status of the responding station
Verified technical data. Last updated: March 2026
Related Faults
Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H