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National Instruments Corporation
6-1
NI-FBUS Hardware and Software User Manual
6
NI-FBUS Function Reference
This chapter provides function reference for the NI-FBUS Communications Manager
software. You must have a general knowledge of the Fieldbus architecture to write programs
for the NI-FBUS Communications Manager, and you must understand how your code will
work with your Microsoft operating system.
Administrative Functions
For details on how NI-FBUS functions are classified and how to use them, refer to Chapter 4,
List of Administrative Functions
Table 6-1.
List of Administrative Functions
Function
Purpose
Closes an open descriptor.
Downloads data to the virtual field device (VFD) domain.
Returns a list of information for all blocks of the type specified in the VFD.
Returns the list of information for all active devices on the network.
Reads the list of interface names from the NI-FBUS Communications
Manager.
Gathers VFD information on a specified physical device.
Returns a descriptor representing a block.
Returns a descriptor representing a Fieldbus link.
Returns a descriptor representing a physical device.
Returns a descriptor for an NI-FBUS session.
Returns a descriptor representing a VFD.
Closes NI-FBUS Communications Manager.
Starts NI-FBUS Communications Manager.