Single card bringing entire chassis down?

[ChrisNagy]

I am developing around a PXI chassis, and seem to be having intermittent communications with 3 of the PXI modules, and none whatsoever with the 4th.  My configuration is as follows:

PXI-1036 driven by benchtop PC with MXI-4 interconnect

Slot 1: PXI-8331 Interface

Slot 2: PXI-4110 DC Power Supply

Slot 3: PXI 6221 Multifunction DAQ

Slot 4: PXI-2501 Switch Module #1

Slot 5: PXI-2501 Switch Module #2

Slot 6 is empty

MAX fails to recognize Switch Module #1.  In fact, when SM#1 is in slot #4, the system does not recognize any of the modules, although the chassis itself still pops up as present.  When SM#1 is removed, MAX locates the remaining 3 modules. 

I also have tried putting SM#1 in slot #6, and the system saw the other 3 modules, but not SM#1.  (I only tries this configuration once). 

I have attempted removing the /data file (as suggested in another post), and have removed reinstalled DAQ-MX (version 8.1), along with NI-POWER and NI_SWITCH.

I have now spent about a day swapping modules around, rebooting my chassis/PC over and over, installing software, etc.  Any and all help would be appreciated.

[Abhinav T]

Hi Chris,

Thankyou for posting on the National Instruments Discussion Forums.

It seems like you have exhausted most debugging tools on this problem. I can only make two suggestions:

- Change the computer the PXI chassis interfaces to - connect the 8331 to another desktop and see if you see the same effect
- Change the PXI chassis if you have another one
- If none of these make any difference, your Switch Module maybe damaged and requires repair. You will need to create a phone support request from ni.com/support in order to get this repair processed. Make sure you have your switch card's serial number at hand when you call in.

Hope this helps!