National Instruments Welding System 321645c-01 Manual De Usuario

Chapter 1

Using the NI-DAQ Functions

©

 National Instruments Corporation

1-3

NI-DAQ FRM for PC Compatibles

When a primary type is inside square brackets (for example, [i16]) an array 
of the type named is required for that parameter.

Some parameters can be in multiple types. Combinations of the primary 
types separated by commas denote parameters with this ability, as in the 
following example:

[i16], [f32]

u16

16-bit unsigned 
integer

0 to 65,535

unsigned

short for 

32-bit 

compilers

Not supported by 
BASIC. For functions 
that require unsigned 
integers, use the 
signed integer type 
instead. See the i16 
description.

Word

i32

32-bit signed 
integer

–2,147,483,648 to 
2,147,483,647

long

Long

 (for example: 

count&

)

LongInt

u32

32-bit unsigned 
integer

0 to 4,294,967,295

unsigned 

long

Not supported by 
BASIC. For functions 
that require unsigned 
long integers, use the 
signed long integer 
type instead. See the 
i32 description.

Cardinal

 (in 

32-bit operating 
systems). Refer to 
the i32 
description.

f32

32-bit 
single-precision 
floating point

–3.402823 x 10

38

 to 

3.402823 x 10

38

float

Single

 (for 

example: 

num!

)

Single

f64

64-bit 
double-precisio
n floating point

–1.797683134862315

 ×

 10

30

8

 to 

1.797683134862315 

×

 10

308

double

Double

 (for 

example: 

voltage#

)

Double

STR

BASIC or 
Pascal character 
string

—

Use character 
array terminated 
by the null 
character 

\0

String

 (for 

example: 

filename$

)

String

Table 1-2.  Primary Type Names (Continued)