GPIB Listener

[Dave Brooks]

I am trying to connect a computer into an existing GPIB controlled system.
What I want, is to programatically monitor all of the comunication going
over the bus, without impcating the communication or performance.

Is this possible?

Dave

[MaxMar]

There are a couple of docs at www.ni.com that might be of some
use:

App Note for configuring 488.2 board for listen-only:
http://zone.ni.com/devzone/conceptd.nsf/appnotebynumber/1D4F87E081CB457B8625680400647625?OpenDocument&node=dz52000_us

Knowledge Base Document:
OKLA1H95


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[Kevin_work]

Dave Brooks wrote:

> I am trying to connect a computer into an existing GPIB controlled system.
> What I want, is to programatically monitor all of the comunication going
> over the bus, without impcating the communication or performance.
>
> Is this possible?
>
> Dave

Dave ,
NI makes a product that is a GPIB controller and analyzer all in one.
This may be what you are looking for.
I think it is GPIB+ or some such.
Kevin Kent

[ajgeiss@my-deja.com]

In article <38930145@newsgroups.ni.com>,
"Dave Brooks" wrote:
>
> I am trying to connect a computer into an
existing GPIB controlled system.
> What I want, is to programatically monitor all
of the comunication going
> over the bus, without impcating the
communication or performance.
>
> Is this possible?
>
> Dave
>

Dave, I am currently trying to do exactly what
you are. I've heard of this mysterious "IbcLON"
command that you set in your config that is
supposed to make your PC a device that can read
all messages. NI hasn't documented the code but
I've heard its out there. I have so far been
unsuccessful doing this. I know that you can not
take the address of one of the devices already on
the bus and just sit there and listen.
Can you
redefine the address of your GPIB card? If you
can, give it a primary address not used on the
current bus. If you can gain access to the
controllers code then whenever it shoots out a
talk command, follow it with a talk to your
address. Kind of a pain, but it would work.
Have you had any more luck?

Andrew


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[BinaryDragons]

Dave, I am working on a simular problem. Did you get
the GPIB+ card to work?