Problem on reading SCXI cards

[eckilein]

Hello.

I'm really new here^^ I'm student from Germany and started using LabVIEW last week... so please be patient, if my questions seem stupid^^
(possibly bad english) ...

OK. I have here 5 SCXI 1125 cards with 5 SCXI 1320 Terminal Blocks on them. From this it follows that, I've 40 measurement connections, each able to detect  -5 to +5V.
I'm not allowed to use the DAQ-Assistent.

The Problem is: If I in LV the first Channel of the first Card "do" on a DAQ-Task and this conduct in an, for example, diagramm, there is no Problem.

But if I do the same with the 2nd channel on the first Card now, is there a reccourceconflict, because of the first Task, which uses the Card.

I know, that the channels are multiplexed and written on the bus. But i don't know, how I can read this data and also not how to use this data in LV...

I hope somebody could help me...

Thanks

Thomas

P.S.: I think, that was not the last question...

Message Edited by eckilein on 01-24-2008 03:15 AM

[mikealder]

There are a number of different methods to read multiple channels across the 1125 boards, the most common one I use which has 96 inputs from 1125 cards is as follows:

Have you setup virtual channels within Measurement And Explorer? I use the syntax VIP001 to VIP040 so each channel has a unique identifier.

In LabView you can use the NI Measurements/ Data Acquisition/ Analogue Input VIs to read any one single channel, a mixture of specific channels or all the channels in a single call.

For a single channel call the Channel name would be "VIP001" using the above channel names

For Multiple channel call "VIP001, VIP007, VIP020" would return a waveform array containing three channels

For All the channels "VIP001:VIP040" would return a waveform array containing all 40 channels

If you need to get at a single waveform from a multi channel acquisition just index the waveform array to pull out the specific waveform data you need