how to acquire more than 32 channels

[parimala]

ical support if you need further assistance.


Ross C
National Instruments"

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parimala on 8/14/2003 commented:
"As you are from NI definitely you might be knowing the answer to my question.
My question is,
I'm continuously acquiring the signals from the field through PXI-6052E,scxi1000 chassis.
I want to display them in different display formats.
For that I have developed some vis(attached) and calling them from main vi.
The problems i'm encountering is
1) I cannot able to display them at a time.Even I can rum them simultaneouly using vi reference,but the fromt panel is not coming to the front.
2) How should I assign the priority for the vis, bec
oz continuously i have to acquire and display.For this I have used Analog i/p vis .I can able to accsess 32 channels using ob0!sc1!md!0:31 .But how can i acquire all the 128 channels using the same vi.
3)What may be the efficient way to log the datas.If saving the datas in a file is thegood way, the waht for Datalogging and supervisiory control.
4)I have developed all the vis.How can i create an exe file.What are all the minimum requirements a system should have to execute my exe file."

[RossC]

I can actually help you with question 3 after reading it more carefully. Assuming you have 4 SCXI modules with 32 channels and you want to read all 128 channels each time you scan, the channel string you could use to do that is:

ob0!sc1!md1!0:31,ob0!sc1!md2!0:31,ob0!sc1!md3!0:31,ob0!sc1!md4!0:31

This will scan across all 32 channels on all 4 modules, so that would pick up all 128 channels in the SCXI chassis.

Ross C
National Instruments

[parimala]

You mean that,This i have to put in a for loop so that it will keep on acquiring all the 128 channels.

[RossC]

You could do the data acquisition in a for loop, a while loop, or any other way you wish to. The channel string I mentioned above will go into the "channel" input control or constant of the analog input VI you are using. As long as this string is in the "channel" input, it will scan all 128 channels.

Ross C
National Instruments