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CHAPTER 10 TROUBLESHOOTING
10
10.1 Troubleshooting Flow
10.1.8 IP communications cannot be performed using the IP packet transfer function.
10.1.8 IP communications cannot be performed using the IP packet
transfer function.
Before troubleshooting the problem as listed below, execute the IP communication test and take corrective actions
according to the error code. ( Page 113, Section 4.3.3)
If the problem cannot be solved using the IP communication test, execute the actions listed below.
Check item Action
Is the IP address of the connected Ethernet device correct?
Set an IP address meeting the IP address setting rules.
( Page 109, Section 4.3.2 (1))
Is the IP address already in use?
• For the Ethernet device, set the IP address different from that of other
devices on the network, such as a CPU module and CC-Link IE
Controller Network module.
• Disconnect the Ethernet device from the line and execute the Ping
command to the IP address of the disconnected Ethernet device. If a
response is received even though the device is disconnected, the IP
address is already in use. Change the IP address.
Has a communication time over error occurred in the IP
communication test?
Check "Relay Network No." in the routing parameters.
Have the routing parameters correctly been set?
• Check and correct the routing parameters. ( Page 111, Section
4.3.2 (2))
• When the first and second octets of the IP address are the same for
the request source device, request destination device, and modules
between them, set the routing parameters so that the third octet of the
IP address of the Ethernet device is used as "Target Network No.".
Is the network number of the Ethernet device side (the third
octet of the IP address) the same as that of modules and
another Ethernet device? (This applies only when the request
source external device, request destination external device, and
modules between them have the same first and second octets
of the IP address.)
Change the network number of the Ethernet device side (the third octet
of the IP address) to the one different from that of modules and another
Ethernet device.
Are settings configured in modules connected to the Ethernet
device correct?
• First and second octets of the IP address
• Subnet mask pattern
• Default router IP address
Check and correct the settings,
Are the firewall and proxy server enabled on the Ethernet
device?
Check and correct the firewall and proxy server settings on the Ethernet
device.
Is a response to the Ping command (ICMP echo request) enabled?
Control station
(Station No.1)
Normal station
(Station No.2)
Normal station
(Station No.3)
Network No.1
Network No.3
Network No.2
192.168.
3.1 192.168.2.1192.168.3.30 192.168.2.30
192.168.1.1
(Automatically assigned)
192.168.1.120 192.168.1.2
(Automatically assigned)
Ethernet
CC-Link
IE Controller
Network
Change the network numbers to those not used for other stations.
IP address
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