DAQ 6024E

[John Chang]

Dear friends,

Does DAQCard 6024E support DAQ Event and Occurence 3 (Analog trigger event)? I know the card doesn't support analog trigger, But I'm not sure whether it supports DAQ Event 3. I tried the card using DAQ Event 3. It works most of time. But it missed some events sometimes.

Regards,

John

[Bill B]

John,

Here is the Help information for DAQ Event 3:

"Set the occurrence when the analog input data obtained from any channel list in the channel control meets the conditions specified by the level conditions cluster. For this event, level A specifies a trigger level and level B sets a window size. When you set slope to positive only, the data must go below the value of level A - level B and then go above level A before LabVIEW sets the occurrence. When you set slope to negative only, the data must go above the value of level A + level B and then go below level A before LabVIEW sets the occurrence. When you set slope to either positive or negative, either condition sets the occurrence. You must use interrupts, not DMA, when using this data acquisition event. LabV
IEW ignores the general value B control."

Note that you must use interrupts in order to use this event. Here is a link to a KnowledgeBase that explains how to set your board up to use Interrupts and not DMA:
http://digital.ni.com/public.nsf/websearch/E30189253619A50086256D1300727C80?OpenDocument

[John Chang]

I've tried DAQ EVENT 3 on DAQCard 6024E. Sometimes event was lost. The possible reason is that conditional retrieval is used on DAQ event 3. My question is:
(1) Is it possible to solve the problem with software. If not then
(2) Which type of DAQ Card could be chosen for the solution?

Best regards,

John