Multiple NI-6508's for simultaneous reading.

[agolovit]

I have group configured each of my 5 PXI-6508's to read all 96-DIO lines at once and assigned a group of 0 through 4 to each one. Is it possible to synchronize the reads between all 5 boards with a meta-grouping or some clock setting? If so, are there any examples of this or has someone attempted to do this for multiple DIO cards?

Thank you.

Alex Golovitser

[KyleBryson]

Dear Alex,

It sounds like you would like to do correlated digital I/O. The PXI-6508 does not support this feature. The digital input in your application is not synchronized to a clock, but timed by software. As you have written your software to read the groups together (close in time, but not at exactly the same time), you should be able to read multiple groups at the same rate near in time. If you would like to post your program or give more information about what you are using (LabVIEW or CVI versions, traditional DAQ or DAQmx), I would be glad to help you with the programming construct that would best read from multiple boards closely in time.

The S Series NI 6115/6120 or p://sine.ni.com/apps/we/nioc.vp?cid=11309〈=US>NI 673x support correlated DIO, and examples for synchronizing multiple boards are available in LabVIEW included examples and on the web.

Thank you,
Kyle Bryson
National Instruments.