Chapter 6
NI-FBUS Function Reference
©
National Instruments Corporation
6-43
NI-FBUS Hardware and Software User Manual
Return Values
E_OK
The call was successful.
E_INVALID_DESCRIPTOR
The descriptor you specified is not valid.
E_TIMEOUT
The device containing the object is present but did not respond
within the timeout period.
E_MULTIPLE
More than one identical tag was found. The function failed.
E_NOT_FOUND
The NI-FBUS Communications Manager could not find the
specified object.
E_BAD_ARGUMENT
The object specified by index was that of a simple data type,
which must already be known to you.
E_RESOURCES
The NI-FBUS Communications Manager is unable to allocate
some system resource. This is usually a memory problem.
E_SERVER_CONNECTION_LOST
The session established with the NI-FBUS Communications
Manager, under which the descriptor was opened, has been lost or
closed.
Visible String
FF_VISIBLE_STRING
1, 2, 3, ...
Octet String
FF_OCTET_STRING
1, 2, 3, ...
Date
FF_DATE
7
Time of Day
FF_TIMEOFDAY
4 or 6
Time Difference
FF_TIME_DIFF
4 or 6
Bit String
FF_BIT_STRING
1, 2, 3, ...
Time Value
FF_TIME_VALUE
8
Table 6-4.
Object Codes for the
nifObjTypeList_t
Data Structure (Continued)
Data Type
objTypeIndex
in
fbtypes.h
Number of Octets (Size)