Accessing MXI Connection Monitor Programmatically

The MXI-4 (PXI-8336) User Manual states that you can "programmatically retrieve data about the link, chassis, and modules you have installed." I have two PXI-1042 chassis bridged together using PXI-8336 cards, and I would like be able to detect if the link is broken between the chassis. I see the device "MXI-4 Connection Monitor "PXI13::9::1::INSTR" in MAX, but the only attribute I can see is "Bridge Retransmit Count" (another useful piece of info for error checking). There doesn't seem to be any utility in NI-VISA to access this information--am I missing something, or maybe this info is kept in registers?
Bottom line, I would like to generate an error in my LabVIEW code if the link is lost between the chassis. Obviously, if this happens, I would get other errors related to the instruments in the downstream chassis, but it would be useful to be able to detect if the fiber optic cable was broken or disconnected.
Any suggestions would be greatly appreciated.

Marcus,
I have a PXI-8108 real-time embedded controller in "Chassis 1" with a PXI-8336 MXI-4 pair extending the PCI bus to "Chassis 2". LabVIEW Real-Time 10.0 and NI-VISA 5.0 are installed on the controller. I am running a real-time executable and using a laptop to display the remote front panel in a browser.
Unfortunately, I discovered today that if I lose the link between the chassis, the controller disconnects and my application stops. Presumably this is due to the PCI bus taking issue with losing half of its devices...
So monitoring the link is a moot point. However, "Bridge Retransmit Count" might still be useful to keep tabs on the health of the bridge or the connection itself. I just don't see any way programmatically to access this info, even though I see it in MAX.
Thanks

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