Problem: Labview 5.1 & HP 34970A via GPIB

Hi all !
I'm a total novice in Labview, but I have to control a HP 34970A with a
20-port MUX to read VDC signal from two dp-cell, a mass flow meter and a
thermocouple. I own a GPIB card (PCII) and I use Labview 5.1 on win95.
The problem is this:
the VISA initialization VI finds the HP, and correctly identifies it (with
the correct GPIB port). But, when I try to read or write (with the VISA
read-write VI) or when I use the HP drivers (found on the National
Instrument site), I obtain an error, which explanation sounds like "VISA
hasn't sufficient information on instrument location". This thing happens
even also when I send a simple request (as the IDN request), via the VISA
read-write VI.
Is it a driver probl
em, a HP problem or a GPIB problem ? I think it is a
driver problem (the GPIB software identifies the Hp). How can I fix it ? I
have downloaded the Labview driver of the HP, but I've noticed there are
also the LabWindows drivers....
Thanks for any advice ! I hope I have explained well the problem...
Regards,
Tetrazzo
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Posted from 131.175.67.92 by way of rmx308-mta.mail.com [165.251.48.43]
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Instead of using VISA try using just the 488 or 488.2 vi's to communicate
with the HP. Verify you can read/write using the GPIB vi's. The logging
system I built uses just the 488.2 vi's and works fine. I found the 34970A
sample vi drivers didn't always works correctly.
"koutatelazzo" wrote in message
news:384788001.985023910852.JavaMail.root@web572-mc...
> Hi all !
>
> I'm a total novice in Labview, but I have to control a HP 34970A with a
> 20-port MUX to read VDC signal from two dp-cell, a mass flow meter and a
> thermocouple. I own a GPIB card (PCII) and I use Labview 5.1 on win95.
>
> The problem is this:
> the VISA initialization VI finds the HP, and correctly identifies it (with
> the correct GPIB port). But, when I try to read or write (with
the VISA
> read-write VI) or when I use the HP drivers (found on the National
> Instrument site), I obtain an error, which explanation sounds like "VISA
> hasn't sufficient information on instrument location". This thing happens
> even also when I send a simple request (as the IDN request), via the VISA
> read-write VI.
>
> Is it a driver problem, a HP problem or a GPIB problem ? I think it is a
> driver problem (the GPIB software identifies the Hp). How can I fix it ? I
> have downloaded the Labview driver of the HP, but I've noticed there are
> also the LabWindows drivers....
>
> Thanks for any advice ! I hope I have explained well the problem...
>
> Regards,
>
> Tetrazzo
>
>
> ______________________________________________
> FREE Personalized Email at Mail.com
> Sign up at http://www.mail.com/?sr=signup
>
> --
> Posted from 131.175.67.92 by way of rmx308-mta.mail.com [165.251.48.43]
> via Mailgate.ORG Server - http://www.Mailgate.ORG

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Instead of using VISA try using just the 488 or 488.2 vi's to communicate
with the HP. Verify you can read/write using the GPIB vi's. The logging
system I built uses just the 488.2 vi's and works fine. I found the 34970A
sample vi drivers didn't always works correctly.
"koutatelazzo" wrote in message
news:384788001.985023910852.JavaMail.root@web572-mc...
> Hi all !
>
> I'm a total novice in Labview, but I have to control a HP 34970A with a
> 20-port MUX to read VDC signal from two dp-cell, a mass flow meter and a
> thermocouple. I own a GPIB card (PCII) and I use Labview 5.1 on win95.
>
> The problem is this:
> the VISA initialization VI finds the HP, and correctly identifies it (with
> the correct GPIB port). But, when I try to read or write (with
the VISA
> read-write VI) or when I use the HP drivers (found on the National
> Instrument site), I obtain an error, which explanation sounds like "VISA
> hasn't sufficient information on instrument location". This thing happens
> even also when I send a simple request (as the IDN request), via the VISA
> read-write VI.
>
> Is it a driver problem, a HP problem or a GPIB problem ? I think it is a
> driver problem (the GPIB software identifies the Hp). How can I fix it ? I
> have downloaded the Labview driver of the HP, but I've noticed there are
> also the LabWindows drivers....
>
> Thanks for any advice ! I hope I have explained well the problem...
>
> Regards,
>
> Tetrazzo
>
>
> ______________________________________________
> FREE Personalized Email at Mail.com
> Sign up at http://www.mail.com/?sr=signup
>
> --
> Posted from 131.175.67.92 by way of rmx308-mta.mail.com [165.251.48.43]
> via Mailgate.ORG Server - http://www.Mailgate.ORG

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National Instruments UK & Ireland

Problem: Labview 5.1 & HP 34970A via GPIB

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