Mitsubishi MELSEC-Q Series User Manual page 427

9 TROUBLE SHOOTING
(2) Troubleshooting on network connection
Symptom
The URL is not correct.
The mode is not "Online".
Access to the Web The Web server module is not connected to
the network. (X4
server module cannot
be made.
There is cable disconnection in the
(The Web screen is not
connection path.
displayed or a file
There are the same IP addresses.
cannot be transferred to
There is a firewall or proxy server in the
the Web server
connection path.
module.)
The personal computer has any problem.
Check if the another Web site is displayed
correctly or not.
Symptom
The Internet service provider setting is not
Connection to the
correct.
Internet service provider
The connection path to the Internet service
cannot be made.
provider is not correct.
Connection to the
A mobile device is used to make connection
Internet service provider
from a place of weak radio waves.
is not stable (e.g.
connection not possible
There is the influence of noise from the
sometimes or
surroundings.
disrupted.)
Symptom
"Connecting through LAN or router" was not
selected in the system setting.
When "Register the above port No. to the
router's NAT" was selected in the system
setting, the router is not compatible with
ADSL connection via
UPnP.
router cannot be made.
"Register the above port No. to the router's
NAT" was not selected in the system
setting.
The information (user name, password) for
connection to the Internet service provider
was not set to the router.
9 - 2
(a) Common, LAN connection
Check point
ON)
(b) Internet connection
Check point
(c) ADSL connection via router
Check point
MELSEC-Q
Corrective action
• Check the URL.
• Set the mode to "Online".
• Connect the Web server module to the
network. (Refer to Section 4.6.3)
• Connect the cable securely.
• Check the IP address.
• Consult a network administrator for the
firewall or proxy server setting.
• Replace the personal computer.
• Update the Web browser.
• Install the OS again.
Corrective action
• Check the Internet service provider setting.
• Check the connection path to the Internet
service provider.
• Move the Internet service provider
connection device to a place of strong radio
waves.
• Take measures against noise in the
connection path to the Internet service
provider.
Corrective action
• Select "Connecting through LAN or router"
in the system setting. (Refer to Section
4.6.3.)
• Use the router compatible with UPnP.
• Set the NAT of the router manually. (Refer
to the router manual.)
• Set to the router the information for
connection to the Internet service provider.
(Refer to the router manual.)
9
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