Test communications

Verify that data is flowing back and forth via the Data In and Data Out counters.

1. Log into the web interface of the device, and select Administration > System Information > Serial.
2. Select a serial port.
3. Open the correct COM or TTY port that maps to this port.
4. You can see the signal state for the port change and verify that the following serial settings are reflected in the web interface:
   • Baud rate
   • Flow control
   • Data and stop bits
5. Insert the loopback plug into the port, and type a message. The message echoes back to you, and the Data In and Data Out reflects the number of characters you type.

   If successful, communication is established and the driver is installed correctly.

6. If you have established communication and your device is not communicating with your application, check the cabling and use the web interface to verify data is flowing back and forth via the Data In and Data Out counters.