Synchronized AI

[Robert R]

Hi

I would like to synchronize AI with an internal counter.On each falling
edge schould be execute one AI.
The counter (GPCTR 0) works correct.
The AI part is following :
AI Config -standard settings; Clock Config - Takt Source Cluster :
GPCTR_OUT
and 0; and in the WhileLoop AI Read ... but it doesn't work.
What make I wrong ?
I'm using STC DAQ E-Series device with LV 6.02.

Thanks
Robert

[Michael_S.]

Robert,

I would start with the LabVIEW example that does Analog input using an External Scan Clock, which can be found by Search Examples -> I/O Interfaces -> Data Acquisition -> Analog Input -> Continuous Analog Input (assuming continuous acquisition) -> Continuous Acquisition and Graph using External Scan Clock.

In the example, it is looking for the external scan clock at the I/O connector or PFI7/StartScan on E-series boards for the scan clock. Using a counter you have two options to route the GPCTR_OUT to the scan clock. First, you can hardwire externally the OUT pin of you counter to PFI7/StartScan and leave the example as is or you can route the OUT pin of the counter to the RTSI line and modify the example to look at the RTSI line for the scan clock (this
option will only work if using counter 0 to produce the scan clock becasue you can only route counter 0 out pin to RTSI).

[Robert R]

Thanks Michael
It works just like I needed.
Robert

"Michael S." wrote:

> Robert,
>
> I would start with the LabVIEW example that does Analog input using an
> External Scan Clock, which can be found by Search Examples -> I/O
> Interfaces -> Data Acquisition -> Analog Input -> Continuous Analog
> Input (assuming continuous acquisition) -> Continuous Acquisition and
> Graph using External Scan Clock.
>
> In the example, it is looking for the external scan clock at the I/O
> connector or PFI7/StartScan on E-series boards for the scan clock.
> (...)