obtain data from 4472 in slots 7-12 in a 1006 chassis

[Debby]

I have a 1006 chassis with eight 4472 boards installed & a 8176 controller. I can communicate with boards in slots 2-6 without problems. When I try to communicate with boards in higher slots, I eventually encounter an error because the data is not retrieved. I understand a PXITrig"n" signal must be connected to PXI bus 2 and 3 somehow, but when I try to follow the example in KB 32GFMIWD using MAX, data is still not received. Is there something programatically I need to do to specify a PXI trigger line and have it propagate from one of the 4472 cards? I do not see an option in route signal that specifies the named line. Please tell the the secret - I haven't done "the slap hand onto forehead" action in a long time,
and I miss it!
Debby

[Dustin_W]

It looks like you are on the right track. The KB you refer to should get all of you triggers routed across the chassis. From you description above I assume you are generating the trigger in one of the lower number slots (2-6), so you should select to 'route right'. Also, you'll need to reserve the specific line that you are genrating the trigger on. If you are generating a trigger on line 3 make sure that line is reserved in segment 2 & 3.

If you are still having problems could you let me know the following:

Are you using the Star Trigger at all? The star trigger is different from the other triggers, and each slot you route the star trigger to needs to be called out explicitly.

What example program are you using? KB 2BT91R2L has a good example of synchronizing DSA boards.

[Debby]

Today, my super wonderful, always supportive NI representative, Mark Lewis came out to my work site and resolved the issue.

We first worked through KB article 32GFMIWD, setting the controls using MAX as specified in the ReservedRouteTrigger.gif and the PXISystemCongiguration.gif images for our test program.

For our system, Trigger Routing was set to: PXI_1 Trigger 0 Route Right and for reserve triggers: TriggerBus2:PXI_Trig0 and TriggerBus3:PXI_Trig0.
This did not work.

After some serious thinking, Mark came up with the idea of NOT reserving the trigger lines in the PXI bus 2 and 3 sections. Once he did this, the cards in slots 6 and above started responding to the trigger.

Mark said he would check his solution with technical support to determi
ne why this solution was contrary to the example published in the KB. Hope to find out why this is the process in my case!!!!!

I realize the star trigger is different from the other triggers. I am using the star trigger and propagating the signal through the system using the PXI_4472_synchronization_example.llb as my template.

Now that Mark has come to my rescue once again, this example program works well, especially now that I can access the slots 6 and above!

Thank you Mark Lewis - you are the best!

Debby