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PXI bus numbering
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gkots
Jul 29, 2008, 8:40:12 AM7/29/08
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I am new to PXI systems.
My system consists of an external PC (MAX 4.4.1, LabWindows CVI 8.5,
WinXP SP3), PXI-1045, PXI-8360, PXI-2532, PXI-4065, PXI-5152, PXI-6552
(x3), PXI-5404, PXI-7842R. I have attached a MAX report of my system. I
have to say that the systems works fine but I have some questions that
have to do with PXI Bus numbering.
1) Who is responsible for the numbering and sorting of these PCI buses?The sorting especially looks a little arbitrary. Why Bus 7, 8 are listed before Bus 4 (chassis 1045)?
2) The bus numbers without description are
PCI bridges of the external PC? Because I looked at the task manager of
the PC and I couldn't find some of them (bus 1, 6, 8). PC's motherboard
is an Advantech AIMB-764. I have also attach the specifications of this
motherboard.
3) Is this Bus numbering important? I mean, can
this numbering affect my software or anything else? For exaple, if I
change PC, these Bus numbers will change? And if this happens, how can
I face this?
My system consists of an external PC (MAX 4.4.1, LabWindows CVI 8.5,
WinXP SP3), PXI-1045, PXI-8360, PXI-2532, PXI-4065, PXI-5152, PXI-6552
(x3), PXI-5404, PXI-7842R. I have attached a MAX report of my system. I
have to say that the systems works fine but I have some questions that
have to do with PXI Bus numbering.
1) Who is responsible for the numbering and sorting of these PCI buses?The sorting especially looks a little arbitrary. Why Bus 7, 8 are listed before Bus 4 (chassis 1045)?
2) The bus numbers without description are
PCI bridges of the external PC? Because I looked at the task manager of
the PC and I couldn't find some of them (bus 1, 6, 8). PC's motherboard
is an Advantech AIMB-764. I have also attach the specifications of this
motherboard.
3) Is this Bus numbering important? I mean, can
this numbering affect my software or anything else? For exaple, if I
change PC, these Bus numbers will change? And if this happens, how can
I face this?
Thank you in advance
MAX report2.zip:
http://forums.ni.com/attachments/ni/270/5678/1/MAX report2.zip
AIMB-764_DS2.pdf:
http://forums.ni.com/attachments/ni/270/5678/2/AIMB-764_DS2.pdf
chris_amadasun
Jul 30, 2008, 6:40:11 PM7/30/08
to
Hello, You cannot change the PXI VISA instrument descriptor for any PXI
devices. However, the you will be able to use a VISA alias for these
devices. Then you can export your MAX configuration file for use on another PC.PXI is built off of the CompactPCI platform,
each slot is essentially a PCI slot. When the PXI system first boots
up, the BIOS on the controller enumerates all of the PCI busses and
slots in the system. This enumerated information is what makes up the
PXI VISA instrument descriptor. As such, this information cannot be
changed. For more details on PXI VISA instrument
descriptor, please refer to <a href="http://digital.ni.com/public.nsf/allkb/2D18F70FD412A28286256B66005414FE?OpenDocument" target="_blank">KnowledgeBase 2IJ896LS</a>. That KnowledgeBase goes into the details of how the enumeration is done and the assignment for each chassis. The hardware description folder found by navigating to your National Instruments folder and then PXI hold the descrition for all the PXI slots and bridges.
devices. However, the you will be able to use a VISA alias for these
devices. Then you can export your MAX configuration file for use on another PC.PXI is built off of the CompactPCI platform,
each slot is essentially a PCI slot. When the PXI system first boots
up, the BIOS on the controller enumerates all of the PCI busses and
slots in the system. This enumerated information is what makes up the
PXI VISA instrument descriptor. As such, this information cannot be
changed. For more details on PXI VISA instrument
descriptor, please refer to <a href="http://digital.ni.com/public.nsf/allkb/2D18F70FD412A28286256B66005414FE?OpenDocument" target="_blank">KnowledgeBase 2IJ896LS</a>. That KnowledgeBase goes into the details of how the enumeration is done and the assignment for each chassis. The hardware description folder found by navigating to your National Instruments folder and then PXI hold the descrition for all the PXI slots and bridges.
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