National Instruments FOUNDATION NI-FBUS Hardware And Software User Manual page 152

Appendix B Troubleshooting and Common Questions
NI-FBUS Hardware and Software User Manual
The USB LED is located on the front of the USB-8486, as shown in
Figure B-3. It indicates whether the USB-8486 is powered, configured, and
operating properly. Table B-5 shows how to interpret the USB LED states.
Table B-5. Interpretation of USB-8486 USB STATUS LED
LED State
Off There is no power on the USB port , the USB-8486 is
disabled, or an error has occurred.
Solid green The USB-8486 is working in USB 2.0 full speed
mode.
Solid amber The USB-8486 is working in USB 2.0 high speed
mode.
The H1 Fieldbus port on the USB-8486 has an LED to indicate the
functional states of the port. Table B-6 describes each state.
Table B-6. Interpretation of USB-8486 H1 Fieldbus Status LED
LED State
Off The USB-8486 has not been initialized.
Solid green The Fieldbus port is disconnected from the network
or receiving nothing.
Slow flashing The Fieldbus port is only receiving/transmitting
green network maintenance packets.
Fast flashing The Fieldbus port is receiving/ transmitting payload
green traffic packets.
Flashing red The USB-8486 encountered an error during the
P.O.S.T.
Solid red The Fieldbus port encountered a fatal network error.
For more information about error handling, refer to the
Troubleshooting section of this appendix.
Meaning
Meaning
B-12
USB-8486
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