5-46
Remote Operation
Example Programs
’-- Read STB to determine when Lambda Zero is complete
Status = viReadSTB(DevSessionNum, STB)
If Status <> 0 Then GoTo ErrorHandler
’-- Check for timeout (this could take over 5 minutes)
If ((Now * 86400) - TimeStart) > (LZ_TMO) Then GoTo ErrorHandler
Loop While (STB And 8) <> 8
End If
’-- Clear the Status Byte
Status = viVPrintf(DevSessionNum, "*CLS" & Chr$(10), 0)
If Status <> 0 Then GoTo ErrorHandler
’-- Summarize Lambda Zero In Progress to the status byte (bit 7, decimal 128).
’-- This can be used later to detect if an operation timed out due to a LambdaZero
Status = viVPrintf(DevSessionNum, "STAT:OPER:ENAB 8" & Chr$(10), 0)
If Status <> 0 Then GoTo ErrorHandler
ErrMsg = ""
CheckLambdaZero = 0
Exit Function
LZ_Timeout:
ErrMsg = "Timeout while waiting for Lambda Zero to complete. Make sure Output 2 is connected" & _
" to Source Input!"
CheckLambdaZero = 0
Exit Function
ErrorHandler:
If Err.Number = 0 Then
CheckLambdaZero = Status
Else
ErrMsg = Err.Number & vbCrLf & Err.Description
CheckLambdaZero = 0
End If
End Function
Private Function TrimVISAStr
(ByVal VISAStr As String) As String
Dim Pos As Long
On Error GoTo ErrorHandler
Pos = (InStr(VISAStr, Chr(0))) - 1
If Pos <> -1 Then
TrimVISAStr = Left(VISAStr, Pos)
Else
TrimVISAStr = Trim(VISAStr)
End If
Exit Function
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