National Instruments 370578B-01 用户手册

that you deleted the last interface, because all the remaining interface 
numbers are decreased by one automatically.

To reinstall the interface, refer to the 

section and the 

 section.

The device description files contain information about the types of blocks 
and parameters supported by your Fieldbus device, along with online help 
describing the uses of given parameters. If your Fieldbus device uses 
manufacturer-specific device description files, you must import the device 
description files (shipped with the device, or available from the device 
manufacturer). To do so, complete the following steps:

1.

Insert the device description disk or CD (if supplied by your Fieldbus 
device manufacturer) into the disk drive of the host computer.

2.

Select Start»Programs»National Instruments»NI-FBUS» 
Interface Configuration Utility to run the Interface Configuration 
Utility.

3.

Click Import DD/CFF. The Import DD/CFF dialog box opens.

4.

Click Browse, browse to the 

.ffo

 device description file path, and 

click Open. Typically, the device description for your Fieldbus device 
is supplied on a disk from the manufacturer. For each device, there are 
two device description files, one that ends in 

.ffo

 and one that ends 

in 

.sym

. Select the 

.ffo

 file, and the corresponding 

.sym

 file will 

be imported automatically. The file name will be in the form 

Digit Digit Digit Digit.ffo

 (for example, 

0101.ffo

).

Table 2-1.  Board Renumbering

Board0

Board0

Board1

(deleted)

Board2

Board1

Board3

Board2