Impulse 2801 - Manual (Page 12)

Appendix A – Troubleshooting
Sealevel Systems SeaLINK+8 Page 9
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 USB 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 SeaLINK+8 is configured properly, the Power LED 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 SeaLINK+8 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 an ASCII string of data.
If this test passes, then the SeaLINK+8 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 2-wire mode, test
the adapter in RS-422 mode first. Then configure the adapter for your
application.