Omega OMG-USB-SER-2 manual Appendix a Troubleshooting

Appendix A – Troubleshooting

Appendix A - Troubleshooting

Serial Utility test software is supplied with the 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 software has been installed on the machine so that the necessary files are in place to complete the installation.

3.When the OMG-USB-SER-2is configured properly, the USB Enabled LED

(E)will be lit. This should allow you to use the 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 Omega if you need further assistance

4.When testing the OMG-USB-SER-2in 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 OMG-USB-SER-2is 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.

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