Agilent Technologies FS2010 Guía de usuario descargar pdf (Pagina 24)

24 Agilent VISA User’s Guide

2 Building a VISA Application in Windows

Sample Program Contents

A summary of the VISA function calls used in the preceding

sample Visual Basic program follows. For a more detailed

explanation of VISA functionality, see Chapter 3,

“Programming with VISA.” See the VISA Online Help for

more detailed information on these VISA function calls.

Call viOpen(defrm, "GPIB0::22::INSTR", 0, 0,

vi)

' Initialize device

Call viVPrintf(vi, "*RST" + Chr$(10), 0)

' Ask for the device's *IDN string.

Call viVPrintf(vi, "*IDN?" + Chr$(10), 0)

' Read the results as a string.

Call viVScanf(vi, "%t", strRes)

' Display the results

MsgBox "Result is: " + strRes, vbOKOnly,

"*IDN? Result"

' Close the vi session and the resource

manager session

Call viClose(vi)

Call viClose(defrm)

End Sub

Table 3 Summary of VISA Function Calls in Visual Basic Sample

Function(s) Description

viOpenDefaultRM You must first open a session with the default resource

manager with the viOpenDefaultRM function. This

function will initialize the default resource manager and

return a pointer (defrm) to that resource manager

session.

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Agilent Technologies FS2010 Guía de usuario Pagina 24