National Instruments NI-FBUS - Manual (Page 115)

Appendix B Troubleshooting and Common Questions
NI-FBUS Configurator User Manual B-6 ni.com
5. Shut down the NI-FBUS Configurator and NIFB process.
6. Select Start»Programs»National Instruments»NI-FBUS»
NI-FBUS Communication Manager to restart the
nifb process.
7. Select Start»Programs»National Instruments»NI-FBUS»
NI-FBUS Configurator to restart the NI-FBUS Configurator.
If your device still does not show up on the bus, check your device
documentation for any requirements on network parameter settings.
The device does not show up in the NI-FBUS Configurator.
1. Try setting the board to a visitor address. Select Start»Programs»
National Instruments»NI-FBUS»Interface Configuration Utility.
Click the appropriate port. Click the Edit button. Change the Address
radio button to Visitor. If there is another link master device on the
bus, set the Device type of the interface board to Basic device. Restart
NIFB. Now see if the device shows up on the network.
2. If the undetected device is a link master, try setting the NI-FBUS
interface as a basic device rather than a link master. To do this, go into
the NI-FBUS Interface Configuration utility. Click the appropriate
port. Click the Edit button. Change the Device type to Basic device.
Restart NIFB. Now see if the device shows up on the network.
3. Start NIFB. In the NI-FBUS Dialog utility, right-click the open
descriptors. Choose Expand All. Then, right-click the session and
open devices, etc. See what kind of devices show up. If an unknown
device shows up, the device is probably causing interference.
The software can tell that something is there, but since it cannot
communicate with it, it shows up as an unknown device. If this is the
case, then it is probably a problem on the device side. The device is not
keeping within its time boundaries. The device might be trying to
transmit before its allotted time or continuing to talk past the allotted
time. Try increasing the minimum inter-PDU delay. This is set in the
NI-FBUS Interface Configuration utility. If you click the Port, then
Edit, then
Advanced , you will see this category under Dlme Basic
Info. The default is 10. By increasing this time, you can increase the
minimum amount of time a device must wait before sending another
packet. Restart NIFB. Now see if the device shows up on the network.
4. You can try changing bus timing parameters Slot Time , Max
Response Delay , and Min Inter-PDU Delay . If you want to try
this, contact the device manufacturer for recommended settings.
Do not guess at these parameters.