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PXI-8360 to PXI-8360 Connection Not Working

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ej

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May 6, 2008, 6:40:10 PM5/6/08
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All,
 
I have a PXIe-1062Q chassis being controlled by my NI-8353 1U controller via&nbsp;a PCIe-8372 to PXIe-8370 link (x4 PXI Express link).&nbsp; I would like to connect a PXI-1056 chassis and control both chassis with the 1U controller.&nbsp; I was told by my inside sales rep (who go the information from a tech) that this was possible by daisy-chaining the two chassis together using two PXI-8360 MXI Experss cards.&nbsp; The 1st card is placed in the last slot of the PXIe-1062Q and the 2nd card is placed in the controller slot of the PXI-1056.&nbsp; I have confirmed this configuration with the KB article <a href="http://digital.ni.com/public.nsf/allkb/5FB4ECBD292BB551862573F500021344" target="_blank">http://digital.ni.com/public.nsf/allkb/5FB4ECBD292BB551862573F500021344</a>.
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The problem is that this configuration is not working for me.&nbsp; The power lights come up on both cards, but the link lights do not.&nbsp; I have installed the lated version of the Platform Services software (2.3.2), I have powered up the chassis in the correct order, and the MXI card was ordered from NI and is inserted correctly.&nbsp; MAX recognizes the PXI-1062 chassis but not the 1056 chassis.&nbsp; I thought that the 1056 chassis may need to be configured as one of the 1062 chassis' PXI busses, but I doesn't look like&nbsp;the 8360 card&nbsp;installed on the 1062 chassis is&nbsp;being recognized by the OS.&nbsp; I guess that I could be due to us controlling the 1st

ej

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May 6, 2008, 7:10:10 PM5/6/08
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All,
&nbsp;
I have a PXIe-1062Q chassis that I am controlling with the NI-8353 1U controller via a PXIe-PCIe 8372 link (x4 PCI Express).&nbsp; I would like to connect another chassis, my&nbsp;PXI-1056 chassis, to the PXIe-1062Q and control them both the the 1U controller.&nbsp; I was told by my inside sales rep (who got the information from a tech) that this can be done by using two PXI-8360 MXI Express cards.&nbsp;&nbsp;The first card&nbsp;goes into the last slot of the 1062 chassis, and the second card goes into the controller slot of the 1056 chassis.&nbsp; I have confirmed this configuration with the KB article <a href="http://digital.ni.com/public.nsf/allkb/5FB4ECBD292BB551862573F500021344" target="_blank">http://digital.ni.com/public.nsf/allkb/5FB4ECBD292BB551862573F500021344</a>.
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The problem is that this configuration isn't working for me.&nbsp; Both PXI-8360 units power up in their respective chassis, but the link lights on each remain off.&nbsp; I am using the latest version of Platform Services (2.3.2), I am powering the chassis in the correct order, and I am using the cable I ordered from NI and making sure that it is inserted correctly.&nbsp; I have also swapped the cards to lessen the&nbsp;possibility that&nbsp;the&nbsp;problem is with one of the cards.&nbsp; I am able to see the PXIe-1062 chassis and its configuration, but I see nothing of the PXI-1056 chassis.&nbsp; I thought that the 1056 might be showing up as on of the busses of the 1062, but it doesn't look like&nbsp;the 8360 card is being recognized by the OS (the Windows XP device manager configuration looks the same whether the 8360 card is inserted or not).&nbsp; I&nbsp;wonder if the problem has to do with the&nbsp;front end&nbsp;PCIe to PXIe link not being compatable with the PXI-8360 card.&nbsp; I would really like to know if this configuration of mine is valid, and if so what am I doing wrong?
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Thanks,
&nbsp;
Eric

Torba

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May 7, 2008, 11:40:17 AM5/7/08
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Hello Eric,
&nbsp;
Although much of the hardware appears to indicate that this will work, it turns out that daisy chaining of PXI Express chassis to PXI-1 chassis or vice versa&nbsp;using purely MXI Express&nbsp;is not available at this time.&nbsp; This is due to architectural differences between PXI Express and PXI-1 technology.
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The x4 MXIe link from the NI-8353 to the PXIe-1062Q chassis with the PCIe-8372 is valid.&nbsp; Using the PXI-8360 in the PXI-1056 chassis is also valid being that it is PXI-1 compatible.&nbsp; However, daisy chaining the 1056 to the 1062Q with MXI Express is where the issue lies.&nbsp;
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It turns out that the information given to you from the sales dept and the KB is incorrect.&nbsp; The sales dept has access to the same resources that you have available so it is quite possible that they saw the same KB, which led them to believe this.&nbsp; This is a mistake on our part, and I apologize for this inconvenience.&nbsp; I highly recommend that you contact your sales representative referencing this forum response.&nbsp;&nbsp;
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Here&nbsp;are a couple&nbsp;suggested solutions if a second chassis is still needed for your application:
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Instead of using two PXI-8360s and a x1 MXIe cable to daisy chain from the 1062Q to the 1056, use a MXI-4 solution instead:
&nbsp;<a href="http://sine.ni.com/nips/cds/view/p/lang/en/nid/13179" target="_blank">http://sine.ni.com/nips/cds/view/p/lang/en/nid/13179</a>&nbsp; - copper link
<a href="http://sine.ni.com/nips/cds/view/p/lang/en/nid/13180" target="_blank">http://sine.ni.com/nips/cds/view/p/lang/en/nid/13180</a>&nbsp; - fiber link
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This will allow you to daisy chain the PXI-1 chassis to the PXIe chassis.&nbsp; Please note that the MXI-4 daisy-chain solution is valid if the PXIe chassis is connected to the host and the PXI-1 chassis is a slave to the PXIe chassis.&nbsp; The throughput is also going to be limited compared to x1 MXI Express link that you were attempting to make so I suggest to keep all high throughput cards in the 1062Q chassis if possible.&nbsp; This chassis does still have the x4 link to the host.
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If you need more throughput, then perhaps switching the 8372 to a 8362 in the host might be another alternative.&nbsp; This would sacrifice the x4 link to the 1062, but you would still have a x1 link to each chassis in a star configuration.
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There might be other alternatives not listed here that would still be feasible which is why I suggest for you to discuss this with your sales representative.
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Once again I apologize for this inconvenience, and I am sure that the sales force will work with you on a solution to this problem.
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Regards,
&nbsp;
Mike Torba
PXI Platform Product Support Engineer
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