© Systems, Inc. 2202 Manual | SL9097 6/ Sealevel 2021
Appendix A
–
Troubleshooting
Serial Utility test software is supplied with the Sealevel Systems adapter and will be used in the
troubleshooting procedures. Using this software and following these simple steps, most common
problems can be eliminated without the need to call Technical Support.
1.
If your adapter isn’t working, first check to make sure that U
SB support is enabled in the System
BIOS, and it is functioning properly in the operating system. This can be done by using either the
Windows 98/ME or Windows 2000 Device Manager.
2.
Ensure that the Sealevel Systems software has been installed on the machine so that the necessary
files are in place to complete the installation.
3.
When the 2/485 is configured properly, the USB Enabled LED (E) will be lit. This should
allow you to use Sealevel’s WinSSD utility and the supplied loopback plug to check
communications. The supplied loopback plug connects TD to RD. If you decide to test the Modem
Control Signals, a full pin loopback plug will be required. Details on loopback plugs are included
on WinSSD. Contact Sealevel Systems if you need further assistance.
4.
When testing the 2/485 in loopback mode, you should see the port LED’s flashing as
well as seeing echoed data on the screen. The loopback test first transmits a HEX pattern, 55AA,
and then a ASCII string of data. If this test passes, then the 2/485 is ready for use in your
application.
5.
Please note that if the adapter is configured for 2 wire RS-485 with no echo a loopback test is not
possible. The receiver in this case will be turned off and the test will fail. If you plan on using this
device in two wire mode test the adapter in RS-422 mode first. Then configure the adapter for your
application.
If these steps do not solve your problem, please call Sealevel Systems’ Technical Support, (864) 843
-4343.
Our technical support is free and available from 8:00AM-5PM Eastern Time, Monday through Friday. For
email support contact:
