Liebert OpenComms, Installation & User Manual

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NIC Setup and Testing
39
Once this information is verified, reboot the card and try to
access SNMP again.
WEB TROUBLESHOOTING
If the card does not serve up a web page, but the Service
Terminal is functioning, SNMP is functioning, and the card is
connected to the network (verified through ping), then reboot the
card. In this case, the web server has been lost and needs to be
restarted.
If the card serves up a web page, but the web page only displays
“Discovering connected device…” verify that the card is
connected to the desired device. Verify that the link lights DS13
and DS8 are blinking on and off. DS13 indicates that the card is
receiving from the connected device. DS8 indicates that the card
is transmitting to the connected device.
If neither of the link lights is blinking, check the connection
between TB1 and P3. TB1 is used to interface to the
Environmental units and to some UPS’s. P3 is used to interface
with some UPS’s. If DS13 is blinking and DS8 is not, this
indicates a communication problem between the card and the
connected device. Replace the NIC card and retry connecting to
the web. If the problem persists, change the card in the device
that the NIC card is trying to interface with. Try to reconnect to
the web.
MODBUS TROUBLESHOOTING
If the card does not respond to Modbus requests, verify that
DS7, “repeater port receive” is flashng during a request. In
proper communications DS12 will also be flashing indicating
“repeater port transmit”
Verify proper wiring on the EIA 485 network. OpenComms NIC
cards should observe a “plus to plus” and “minus to minus” daisy
chain configuration.