4 TROUBLESHOOTING
4.4 Troubleshooting by Symptom
127
4
When IP communications cannot be performed using the IP packet transfer function
Before troubleshooting the problem as listed below, perform the IP communication test and take actions according to the error
code. (
Page 47 IP communication test)
If the problem cannot be solved using the IP communication test, take 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. (
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 Ethernet-equipped module, master/local module, Simple Motion
module, and Ethernet adapter 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?
• When "Dynamic Routing" under "Application Settings" is set to "Disable", correct the
relay station network No. in "Routing Setting" of "CPU Parameter".
• When "Dynamic Routing" under "Application Settings" is set to "Enable", check
"Communication path determination status" (Un\G24480 to Un\G24495) to check that
the communication path to the transfer destination network No. which is set in the third
octet of the Ethernet device IP address is determined.
Have the routing parameters correctly been set? (Only when
"Dynamic Routing" under "Application Settings" is set to "Disable")
• Correct "Routing Settings" of "CPU Parameter".
• 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
the target station network No.
Is the network No. 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 No. of the Ethernet device side (the third octet of the IP address) to
the one different from that of modules and another Ethernet device.
Is the CC-Link IE Field Network gateway setting correct? (This
applies only when the request source device, request destination
device, and modules between them do not have the same first and
second octets of the IP address.)
• Check and correct the setting in the module compatible with the CC-Link IE Field
Network gateway setting. (
Manual for the module compatible with the CC-Link IE
Field Network gateway setting used)
• When "Dynamic Routing" under "Application Settings" is set to "Disable", set the
communication path to the CC-Link IE Field Network gateway setting station in
"Routing Setting" of "CPU Parameter".
• When "Dynamic Routing" under "Application Settings" is set to "Enable", check
"Communication path determination status" (Un\G24480 to Un\G24495) to check that
the communication path to the transfer destination network No. which is set in the third
octet of the Ethernet device IP address is determined.
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 setting in the module connected to the Ethernet device.
Is the firewall or proxy server setting enabled on the Ethernet
device?
Check and correct the settings on the Ethernet device.
Is a response to the Ping command (ICMP echo request) enabled?
Is the antivirus software on the Ethernet device blocking the
communication?
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) enabled in the firewall
settings?
Station No.2
Station No.1
Master station
(Simple Motion
module)
Network No.1
Network No.
3
Network No.
2
192.168.
3
.1
192.168.
2
.1
192.168.
3
.30
192.168.
2
.30
192.168.1.1
(Automatically
assigned)
Ethernet
CC-Link
IE Field
Network
Change the network Nos. to those not used for other stations.
IP address
192.168.1.125
192.168.1.2
(Automatically
assigned)
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