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E3640A problem reading current over RS232

Question asked by humor on Apr 11, 2010
Latest reply on Apr 13, 2010 by humor
  • Comment • 2
I'm using the sample code "Diode Test" provided for E3631A. I'm able to send commands to the E3640A successfully. However, on inquires, for example "Meas:Curr?" I get a VI_ERROR_TMO (80040015). Please help!
Below is partial code:
With Pwr
        .WriteString "Syst:Rem"
        .WriteString "*RST"                               ' Reset the power supply
        .WriteString "*CLS"                               ' Clear any error messages
        .WriteString "Curr " & Str$(Range("E2").Value)                              ' Set current MaX To 1amp
        For i = 5 To 15
            reply = Cells(i, 1)
            .WriteString "Volt " & Str$(Cells(i, 1))
            .WriteString "Output on"                      ' Turn on the output
            Pwr.WriteString "Meas:Curr?"
            delay (0.5)
            reply = .readstring
            .WriteString "Output off"                     ' Turn off power supply  
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