primary address of GPIB card

[Steve Reeves]

While using 2 GPIB-PCI cards on a Fluke Met/Cal calibration system, I got an EADR error message. Fluke tells me that I should make sure the NI configuration has a different primary address for ech card. One card is common to all the test instruments (14 instruments) and the other card is solely for use by the Unit Under Test (UUT). I believe both had a primary address of '0' before so I changed one to '1'. We also had 2 laptops that also run this app and they use PCMCIA cards (2 in each laptop) which also have both primary addresses set to '0'. They work OK. Another concern is that during an IDN? query to an Hewlett-Packard 437B, I get a readback of 'HEWMEUT-QACKASD,HP 437C,,2.0'

[Rob Cole]

The primary GPIB address refers to the address on the GPIB bus. You must change one if the 2 cards are on the same bus (which they are not in your case). I haven't worked with Metcal since the DOS version, but there should be a configuration utility that will let you tell Metcal where to find the cards. Make sure that both cards are setup in the utility. The NI-488.2 Getting Started Wizard should see both cards and list them as GPIB0 and GPIB1.

Have fun with it.
Rob

[Gorgo]

Hello

Maybe I'm wrong if this is true please correct me !

If he had 2 GPIB card so he had two boards and each board can have 14
instrument ! If this is true, both of them can have gpib 0 address !

Thanks for correct if I wrong !

Gorgo

> The primary GPIB address refers to the address on the GPIB bus. You
> must change one if the 2 cards are on the same bus (which they are not
> in your case). I haven't worked with Metcal since the DOS version, but
> there should be a configuration utility that will let you tell Metcal
> where to find the cards. Make sure that both cards are setup in the
> utility. The NI-488.2 Getting Started Wizard should see both cards and
> list them as GPIB0 and GPIB1.
>
> Have fun with it.
> Rob

[Rob Cole]

Yes, both can be address 0 as long as they are on different buses. If they are connected through the GPIB bus then not only does one have to have its address changed, but one also has to be set as a non-controller.

If the cards are on seperate GPIB buses then each can control 14 instruments.

Rob

[Gorgo]

Ok...

thanks

Gorgo