triggering the data acquision on an analog channel by using external trigger (PFI0/AI start trig) with Labview signal express and PCI 6251 and SCB-68pin E series connections?

[youngwater]

how can I trigger the data acquision on an analog channel by using external trigger (PFI0/AI start trig) with Labview signal express and PCI 6251 and SCB-68pin E series connections.

[demux]

Greetings sir,

I tried combining the information in your two posts but one thing is unclear to me. Are you trying to accomplish triggered Acquisition or retriggerable acquisition?

Triggered acquistion can be programmed immediately in the SignalExpress DAQ Step Setup.

Retriggerable Acquisition however is something else. Analog input tasks are not inherently retriggerable but counter tasks are. Therefore a retriggerable acquisition is a combination of a counter and Analog input task. I see no direct solution to program this in SignalExpress without using LabVIEW.
Now, it is possible to call LabVIEW VI's in SignalExpress. This however has some limits and there are some things to keep in mind. You can find all the information about combining LabVIEW and SignalExpress here.
The LabVIEW-based solution for retriggerable Analog Input is available in this article.
It might be possible to successfully combine the two but programming everything in LabVIEW would be easier in my opinion. Don't forget that you can export your SignalExpress application to LabVIEW, so everything you have built in SignalExpress is not lost at this point.

Kind Regards,
Wouter
National Instruments

[youngwater]

dear sir,

thank you for your answer.

I tried to run the article (retrigg_ai_analogtrigger.vi) you suggested. but it requires and searches for the following:

Get Terminal Name with Device Prefix.vi

how can I find it?

(I have Labview 8, and  NI-DAQmx 8.0 driver)

[youngwater]

it is OK, I've found it:

c:\programmes\NI\Labview\examples\DAQmx\_utility\_utility.llb