MCC PCI boards issue

[Pierluigi]

Good afternoon. Recently we had to replace an old computer with our measuring software and 2 MCC PCI boards (PCIM-DAS16JR/16 and PCI-QUAD04) installed.
Boards were working OK, just the PC needed to be replaced, so we moved the 2 PCI boards on a new PC. We installed and configured the last drivers using Instacal 6.74 package.
At first sight everything seems ok. Measurements can be performed apparently with no problems. But after some time (and some measurements done) the system gives the BSOD (Blue Screen of Death) saying "Stop code: driver irql not less or equal; What failed: mcpci.sys".
This happens several times a day and, when it happens, it is always a few seconds after the start of data acquisition with the measuring software.
Hardware: Vecow RCX-1422 with 2 PCI slots. OS: Windows 10 Enterprise LTSC (Version 1809, Build 17763.6189).

Please can anyone suggest how to solve this issue?

[Fausto]

Hello @Pierluigi.

You may have a configuration conflict between the PCIM-DAS16JR/16 and the Vecow PC.  Check the IRQ assignments in the system BIOS.  

Test each MCC PCI board individually with the new system; one board installed each time.  Does the BSOD occur with one board in particular or only with both boards installed?

Regards,

Fausto

[Pierluigi]

Hello Fausto.

Thanks for fast reply.

The PC is at customer location in a working line. Trying one board at a time is not possible because they must work together in standard measuring conditions (A/D+Encoder). Testing would not be feasible.

The suspected board is the A/D (PCIM-DAS16JR/16) anyway.

IRQ assignments should be done by the final customer, under our guide, someway.

Do you have an idea of how to find the right IRQ to be assigned?

[Fausto]

The PCI board does not specify a specific IRQ.  Set the PCI slot to an IRQ that is not used/shared by another device or the system.

 

[Pierluigi]

I checked the 2 devices properties and assigned IRQs seems not in conflict.

Does it matter or not, according to what you wrote?

[Fausto]

It is good to know that both boards are not sharing the same IRQ, but is there any other hardware in that PC which uses either of these IRQ's?

Please check the system BIOS and the PC specifications.  You may find another device sharing the same IRQ.  If that is the case, then change the PCI IRQ for the board with a conflict.

 

[Pierluigi]

There are no other PCI boards installed here.

Looking at the PC manual, in BIOS chapter, we see that the only section with IRQ modify possibilitiy is related to the 4 Serial Ports.

Anyway, if the properties of the 2 PCI boards say "no conflicts", then I understand that no other devices have the same IRQ. Right?

Don't you think it may be a driver issue, so?

[Fausto]

Hello @Pierluigi.

The two boards are not sharing the same IRQ, but I do not know if other system devices are sharing those two IRQs.

Install the current release of InstaCal for the latest drivers and then retest your application.

https://cloud.digilent.com/myproducts/InstaCal?&pc=1&tab=2

Regards,

Fausto

[Pierluigi]

Good morning @Fausto,

drivers installed are already the last ones. Trying with older ones could be a good idea?

Anyway, after writing to the Vecow support, we'll ask the final customer to try to change some BIOS settings in order to see what happens.