National Instruments PC-OPDIO-16 Manuale Utente

To do so, go to the Project window and choose the Global module, then choose Load Text
from the Code menu.  Select 

NIDAQCNS.INC

 , which is in the 

NIDAQWIN\VB_EX

 directory.

Choose Replace or Merge, depending on how you want to incorporate this file into your global
module.

This procedure is identical to the procedure you would follow when loading the Visual Basic file

CONSTANT.TXT

.  Search on the word CONSTANT for more information from the Visual Basic

on-line help.  Alternatively, you can cut and paste individual lines from this file and place them
in the module where you need them.  However, if you do so, you should remove the word Global
from the CONSTANTS definition.  For example,

GLOBAL CONST ND_OUTPUT_POLARITY&

= 27240

would become:

CONST ND_OUTPUT_POLARITY&

= 27240

In the LabWindows/CVI environment, NI-DAQ functions appear in the Data Acquisition
function panels under the Libraries menu.  Each function panel represents an
NI-DAQ function, which is displayed at the bottom of the panel.  The function panels have help
text for each function and each parameter.

Table 6-3 shows the LabWindows/CVI function panel and the name of the corresponding
NI-DAQ function which supports the PC-OPDIO-16 board.

Table 6-3.  LabWindows/CVI Function Tree for Data Acquisition

Using the PC-OPDIO-16

Initialize Board

Get Device Information

Get DAQ Library Version

Read Port

Read Line

Write Port

Write Line

Initialization/Utilities is a class of functions used for general board initialization and
configuration, for configuration retrieval, and for setting NI-DAQ properties.  This class also
contains several useful utility functions.

Digital Input/Output is a class of functions that perform digital input and output operations.