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Chapter 6
NI-FBUS Function Reference
NI-FBUS Hardware and Software User Manual
6-26
ni.com
Core Fieldbus Functions
You can use the NI-FBUS core functions to access Fieldbus block parameters using any type
of descriptor. Because there are several ways to identify the Fieldbus block parameters, the
NI-FBUS core functions accept special interface macros for the
name
argument, as well as
the standard
TAG.PARAM
identifier format. Refer to the
section for
tips on using the interface macros.
List of Core Functions
Table 6-2.
List of Core Functions
Function
Purpose
Frees an
nifAttributes_t
structure allocated during a
previous call to
nifGetObjectAttributes
.
Frees an
nifObjTypeLinst_t
structure allocated during a
previous call to
nifGetObjectType
.
Reads a single set of object attributes from the Device
Description (DD).
Returns the Object Dictionary symbol name of the specified
object.
Returns the size in bytes of an object’s value.
Returns the Object Dictionary type of the specified object.
Reads an object’s value from a device.
Reads the values of several objects from a device or several
devices.
Writes a parameter value to a device.