National Instruments FOUNDATION NI-FBUS Hardware And Software User Manual page 146

Appendix B Troubleshooting and Common Questions
USB-8486 Troubleshooting
Configuring Advanced Parameters
Caution Do not modify the Advanced parameters without good reason. If you must
modify parameters for certain devices, the device manufacturer will recommend settings.
Modifying these parameters can have an adverse affect on data throughput rates. If settings
are incorrectly modified, some devices might disappear off the bus.
NI-FBUS Hardware and Software User Manual
The H1 Fieldbus LED flashes red.
The USB-8486 encountered an error during the Power-On Self-Test
(P.O.S.T.). Complete the following steps to correct the issue.
1. Remove the USB-8486 from the computer and close NI-FBUS
Communications Manager.
2. Connect the USB-8486 to another USB port in the system.
3. Start the NI-FBUS Communication Manager.
If the H1 Fieldbus LED still flashes red, contact National Instruments
through the information provided in Appendix C,
Professional Services.
The H1 Fieldbus LED is solid red.
The USB-8486 H1 Fieldbus port encountered a fatal network error.
Complete the following steps to correct the issue.
1. Remove the USB-8486 from the computer and close NI-FBUS
Communications Manager
2. Re-connect the USB-8486 to the USB port of the system again.
3. Restart the NI-FBUS Communication Manager and check the
H1 Fieldbus LED state.
In the NI-FBUS Interface Configuration Utility, click the Advanced button
on the dialog box for the port you want to configure. The Advanced Stack
Configuration dialog box is shown in Figure B-1.
B-6
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