Mitsubishi Electric MELSEC iQ-R Series User Manual page 200

Communications with Ethernet devices failed
When communications with Ethernet devices cannot be performed, check the following items.
Check item
Is the firewall or proxy server setting enabled on the Ethernet device?
Is the antivirus software on the Ethernet device blocking the
communication?
In multicast mode, is a standard Ethernet device connected to the
master station?
In multicast mode, is a standard Ethernet device connected to a local
station or remote station that does not support the multicast filter?
In multicast mode, are a local station and an Ethernet device connected
on the end side via a switching hub?
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
If the above actions do not solve the problem, perform the module communication test to check for hardware failure. (
Page 168 Module Communication Test)
Although the data link is normal, communications for the link device failed
When the link device cannot communicate although the data link is normal (D LINK LED is on), check the following items.
Check item
Is "Reserved/Error Invalid Station" of the slave station set to "Reserved
Station" in "Network Configuration Settings" of the master station?
Is the input/output bit setting or input/output word setting of the slave
station set in "Network Configuration Settings" of the master station?
(Simple display)
Are "RX Setting", "RY Setting", RWw Setting", "RWr Setting", "LB
Setting", and "LW Setting" of the slave station set in "Network
Configuration Settings" of the master station? (Detailed display)
Does the slave station support the link devices set in "Network
Configuration Settings" of the master station?
Is the link refresh setting range correct?
Is the refresh range of "CPU Side" in "Refresh Settings" overlapped with
that of "CPU Side" of another network module?
Is the transfer range set in "Interlink Transmission Settings" correct?
Are the settings in "Transfer Source Module" and "Transfer Destination
Module" of "Interlink Transmission Settings" correct?
When the local station cannot receive cyclic data from another station, is
"Communication Mode" of the master station set to "Multicast"?
4 TROUBLESHOOTING
198
4.4 Troubleshooting by Symptom
Action
Check and correct the settings on the Ethernet device.
Is a response to the PING command (ICMP echo request) disabled?
Check and correct the antivirus software settings on the Ethernet device.
• Is the security setting level of the antivirus software low?
• Is a response to the PING command (ICMP echo request) disabled in the firewall
settings?
• Connect the standard Ethernet device to a local station or remote station that
supports the multicast filter.
• Set unicast mode.
• Take actions so that the Ethernet device does not receive cyclic data in multicast
mode.
• Connect the standard Ethernet device to a local station or remote station that
supports the multicast filter.
• Set unicast mode.
• Take actions so that the Ethernet device does not receive cyclic data in multicast
mode.
• Configure settings with the switching hub so that the multicast frame (with
multicast MAC address 09:00:70:00:10:02 and 09:00:70:00:10:05) will not be
transferred to the port of the standard Ethernet device.
• Check the connected device and do not connect both a local station and an
Ethernet device on the end side of the switching hub.
• Set unicast mode.
• Take actions so that the Ethernet device does not receive cyclic data in multicast
mode.
Action
Set "Reserved/Error Invalid Station" of the slave station to "No Setting".
Set a link device used in the slave station correctly.
Set a link device used in the slave station correctly.
Correct the link devices to be assigned to the slave station in "Network
Configuration Settings" of the master station.
Correct the setting in "Refresh Settings" of "Basic Settings".
Correct the setting in "Refresh Settings" of "Basic Settings".
Correct the transfer range set in "Interlink Transmission Settings".
Correct the settings in "Transfer Source Module" and "Transfer Destination Module"
of "Interlink Transmission Settings".
Set "Communication Mode" of the master station to "Multicast".