Lantronix
SDSTX3110-124-LRT-B User Guide
33686 Rev. C
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6.2 Procedure
If the SDS device fails, isolate and correct the failure by performing the following steps.
1.
If the SDS does not turn on and no LEDs light, then the SDS or the power source may be damaged, or the
SDS does not have power. Make sure that the power source is properly connected to the SDS. Make sure the
power adapter is connected to a functioning electrical outlet.
2.
on page
on page
3.
If the SDS does not respond even though it is functioning. Verify that the SDS is powered up; the serial cable is
correct and undamaged, and that the serial port settings are correct. Verify the cable pinouts, try a different serial
cable, and then try a different port on the SDS.
4.
Check recent notifications. See
on page
on page
5.
If the SDS is not discovered, verify that the PWR LED is lit. If the Status LED is not lit, check the firmware
version. If the SDS firmware has been upgraded from the factory default, reset the SDS to its factory defaults.
Cycle power on the box and wait approximately 30 seconds. Verify that the SDS and the PC are on same subnet.
6.
If the Web browser does not display, check the Web connection. Verify that a supported browser being used. If
not, install and use a supported browser. Use Ping to verify the connection. If ping fails, verify that the subnet
mask, Gateway address, and IP address are OK. Correct the PC setup and then retry. If ping is OK, check if IE is
set up to use a proxy server. If so, disable the proxy server and retry.
7.
Make sure that the application is set to use the correct COM port number. Verify that the COM port(s) shows up
in the PC’s Device Manager.
8.
If you are having problems with changing the serial interface settings:
With a VCOM set up to a serial port, and a DB9 cable connected to a serial device, changing the interface type
(e.g., from RS232 to RS422) will hang the SDS unit. The unit can be pinged but will not connect to the SDS-
Manager or the web. The SDS unit must be power reset to restore the connection. This occurs if the change is
made from the SDS-Manager or the Web UI. This applies to both the SDSTX 3110-121-LRT-B and SDSTX3110-
124-LRT-B.
Once a VCOM connection has been set up, do not make serial port changes.
For reference, once you have a VCOM set up to a serial port, a DB9 cable connected to a serial device and an
application running over the VCOM connection, changes to the serial settings are blocked by the software.
After a Virtual COM has been mapped to a port, changes to the serial settings of that port (e.g., from RS232 to
RS422) should not be made.
9.
Check the website for updated firmware; upgrade if available. See
10.
Record model information (see
below) and then contact Tech Support.
