National Instruments 370578B-01 用户手册

6.

Select the Read by Name radio button and enter 

 as 

the name. Click Read. Write down the hexidecimal number found 
in parenthesis (0xnumber) in Table A-1.

7.

Repeat step 6 for the name 

.

8.

Repeat step 6 for the name 

.

9.

Repeat step 6 for the name 

.

10. Repeat steps 5 through 9 for each device, then close the NI-FBUS 

Dialog utility.

11. In the Interface Configuration Utility, click DD Info. Write down the 

base directory specified for device descriptions. Close the Interface 
Configuration Utility.

12. Use Windows Explorer to view the contents of the base directory 

specified in the Interface Configuration Utility. The Fieldbus 
specification defines the directory hierarchy for storing device 
descriptions. There is a different subdirectory for each device 
manufacturer. Under the base directory, you should see a directory 
with the number from step 6 for the first device.

13. Under the appropriate manufacturer directory, there is a directory for 

each device type that you have from that manufacturer. Check to make 
sure that you see a directory with the number from step 7.

14. Under the appropriate device type directory, there are individual device 

descriptions. The device description file name is a combination of the 
device revision (the number from step 8) and the device description 
revision (the number from step 9). The device revision is the first two 
digits, and the device description revision is the second two digits. For 
example, if your number from step 8 was 2 and from step 9 was 1, you 
should see files called 

0201.ffo

 and 

0201.sym

. Device descriptions 

are backward compatible. This means that instead of seeing 0201, you 
might see 0202. This is allowed by the Fieldbus specification. Also, 
having additional files in this directory is not a problem. The NI-FBUS 

Table A-1.  Device Names

MANUFAC_ID

DEV_TYPE

DEV_REV

DD_REV