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27
Chapter 5
Ethernet Troubleshooting
There are typically only two reasons why you would be unable to communicate with a OM-WEB Series device
and access the web interface:
The OM-WEB Series device is configured incorrectly, or is operating incorrectly.
The network is configured incorrectly. Though the device is functioning normally, you are unable to
communicate with it over the network.
Though a detailed treatment of debugging the network is beyond the scope of this manual, there are a few things
to try to determine if the problem experienced is a problem with the OM-WEB Series or with the network
configuration.
Perform the procedures below to verify the physical and network connections.
Contact your network administrator for issues with your network configuration
Omega Engineering provides technical support for OM-WEB Series hardware connectivity and operation only.
For networking issues, contact your network administrator or computer professional.
Check the OM-WEB Series device status LEDs
1.
Verify the external power connection. When external power is supplied to the device, the
POWER/COMM
LED illuminates turns on steady green.
o
If the
POWER/COMM
LED is off, check the power cable and the socket that the cable is plugged into.
If the cable is good, plugged in, and the power to the socket is on, then the device is not powering up
correctly. Contact Omega Engineering technical support. Refer to
on page 30 for contact
information.
2.
Verify the Ethernet connection. The
LINK/ACTIVITY
LED turns on steady green when the OM-WEB Series
device is connected to an active Ethernet hub or switch.
o
If the
LINK/ACTIVITY
LED is off, verify that the Ethernet cable is the correct type, that it is not
damaged , and that it is connected correctly between the OM-WEB-TEMP, OM-WEB-TC and a
known functional server/hub/switch (or connected to your computer if you are connected directly).
o
If the Ethernet cable is plugged into a wall socket, check with your Network Administrator or
computer professional that the wall socket is active, and that it is connected to an active Ethernet hub
or switch.
If you are properly connected to an active server/hub/switch and the LED is still off, there is a problem
with the OM-WEB Series device. Contact Omega Engineering technical support. Refer to
page 30 for contact information.
3.
Verify the network connection:
When the device is connected to a network, the
LINK/ACTIVITY
LED blinks when there is activity on the
network.
o
If the
LINK/ACTIVITY
LED is on solid green, your network’s traffic is at its maximum limit and no
communication is possible, or the network traffic is idle. Check with your network administrator.
o
If the
LINK/ACTIVITY
LED is off, there are two possibilities:
You are not connected to the network, even though the device is connected to an active
server/hub/switch. An average network has at least some traffic that causes the LED to blink. Perform
the procedure listed in
The device is not receiving data, and the network connection is verified by a network administrator.
Contact Omega Engineering technical support. Refer to
information.
When the OM-WEB Series device is directly connected to a computer via a crossover cable or a single
hub/switch, the
LINK/ACTIVITY
LED blinks when data is transmitted or received over the Ethernet
connection.