Missing device – National Instruments NI-FBUS User Manual
Page 114
Appendix B
Troubleshooting and Common Questions
© National Instruments Corporation
B-5
NI-FBUS Configurator User Manual
you would like to change this setting. Under the Options tab, locate the
parameter called
STATUS_OPTS
. If you click its field, a drop-down menu
will appear with a checkbox called Uncertain as Good. If you select this
option and click Write Changes, the function block will now treat
Uncertain quality received on its input as Good.
Missing Device
Selecting Update Attributes from a device menu on the menu bar, or when
right-clicking the device, causes the device description to be reread. This is
sometimes useful after replacing devices.
Information from the device description does not show up under
Windows NT.
If you are not logged in as administrator under Windows NT, the block
types in the configuration tree are listed as being unknown. The block
configuration window correctly lists parameter names but not the names
of enumeration values. You need to log in as an administrator to view the
device description information.
A device does not appear in the configuration tree.
The communication parameters are incorrect. Complete the following
steps:
1.
Check all connections.
2.
Make sure that the bus is appropriately powered, if your devices
require it or that their own power supplies are providing power.
3.
Select Start»Programs»National Instruments»NI-FBUS»
Interface Configuration Utility and click the Advanced button.
4.
Set the following parameter values.
Parameter
Value
Number of unpolled nodes
Refer to the
section
MinInterPduDelay
20
Slot time
10
Max Response delay
8