Mitsubishi Electric MELSEC iQ-R Series User Manual page 182

Precautions
• When a relay sending station is set to "Target Station", the communication test ends with an error. Set a relay receiving
station to "Target Station".
Network No.1
Station
No.0
Own station Receiving
(request source) (relay) station
• When "Network No./Station No." is selected for "Communication Method" and a station mounted on the same base unit
(main base unit and extension base unit) is set to "Target Station", the communication test ends with an error.
• Since this function uses PING, a communication test target station communication error (error code D919H) occurs if the
communication target does not respond to PING. When executing this function, check if the security setting (such as
firewall) of the communication target is set to respond to PING. Moreover, if the target is set not to respond to PING in the
security settings (such as a firewall), it may take some time until a timeout error occurs on the engineering tool. For details
on when communication using the engineering tool is not allowed in the settings of Windows Firewall, refer to the following.
 GX Works3 Operating Manual
4 TROUBLESHOOTING
180
4.3 Checking the Network Status
Network No.2
Station Station Station
No.1 No.2 No.0
Sending
(relay) station