GridConnect NET232 User Manual page 60

Troubleshooting
Problem/Message
When you try to assign an IP
with Device Installer, you get
the following message:
"No response from device!
Verify the IP, Hardware
address and Network Class.
Please try again."
No LEDs are lit.
The server is not
communicating with the serial
device it is attached to.
When you try to enter the setup
mode on the server via the
serial port, you get no
response.
You can ping the server, but not
Telnet to the server on port
9999.
When connecting to the Web-
Manager within the server, the
message "No Connection With
The server" displays.
5-2
Reason
The cause is most likely one of
the following:
The Hardware address you
specified is incorrect.
The IP address you are trying to
assign is not a valid IP for your
logical subnet.
You did not choose the correct
subnet mask.
The unit or its power supply is
damaged.
The most likely reason is the
wrong serial settings were
chosen.
The issue will most likely be
something covered in the
previous problem, or possibly
you have Caps Lock on.
There may be an IP address
conflict on your network
You are not Telneting to port
9999.
The Telnet configuration port
(9999) is disabled within the
server security settings.
Your computer is not able to
connect to port 30718 (77FEh)
on the server.
Solution
Double-check the parameters that
you specified. Tip: You cannot
assign an IP address to a server
through a router.
Change power supplies.
The serial settings for the serial
device and the server must
match. The default serial settings
for the server are RS232, 9600
Baud, 8 Character Bits, No Parity,
1 Stop Bit, No Flow Control.
Double-check everything in the
problem above. Confirm that
Caps Lock is not on.
Turn the server off and then issue
the following commands at the
DOS prompt of your computer:
ARP -D X.X.X.X (X.X.X.X is the IP
of the server)
PING X.X.X.X (X.X.X.X is the IP
of the server).
If you get a response, then there
is a duplicate IP address on the
network (the LEDs on the server
should flash a sequence that tells
you this). If you do not get a
response, use the serial port to
verify that Telnet is not disabled.
Make sure that port 30718
(77FEh) is not blocked with any
router that you are using on the
network. Also make sure that port
77FEh is not disabled within the
Security settings of the server.
NET232/NETUSB User Guide