Can the 12 Ports of the PCI 6508 set independent from each other to I and O?

[BFutzi]

Hello,
can the 12 Ports of the PCI 6508 set independent from each other to I and O?
Or are they configured in groups like A, B and C ports?

Thanks,
BFutzi

[DirkW]

The attached example demonstrates how to write a digital pattern to multiple ports with a single write call, overcoming the 32-line limitation of the DIO Port Write VI.

[BFutzi]

I dont have the card yet, so can't test it.
I just need to know if i can set the 12 ports independent from each other to I/O. If not i have to buy 2 or more cards i think.

Greetings,
BFutzi

[DirkW]

If you have to reconfigure your ports often and independently, then you should use the new NI Board 6509. This Board hasn´t the limitation of using the 82C55 DIO Interface for every 3 Ports.
So you can configure each Port independently on the 6509. But this device only works with the new Driver Generation DAQmx 7.1.
The 6508 resets all 3 Ports if you reconfigure one Port. Hope that helps.

[HerwigVD]

Hello,

I am upgrading from Traditional DAQ to DAQmx on an old installation with a PXI-6508 board.

I struggle with this reset problem.

I read the post from NI "Archived: PCI DIO-96/PXI 6508/PCI 6503 Digital Ports cannot be Controlled Independently".

This post states:

"NI-DAQmx is expected to work around this issue by resetting the other ports of the 8255 to the last known state.This means that the other ports may momentarily be reset, but will return to their previously set values."

Does anyone can confirm that this is true?

I notice that e.a. port 11 is reset when I write to port 10, but the values of port 11 are not set to the last value I had written to it.

Herwig.