How to start 2 counters with precision delay?6602

[Irena]

I need to run 2 counter outputs triggered from 2 different sources(card 6602). It seems like both of them can only catch same trigger.How possible start 2 counters with precision delay?

[Doug M]

Irena,
It is definitely possible to use two trigger sources to tigger two separate counter tasks.  You would create two separate tasks and use a DAQmx Trigger VI for each counter task.  You could then specify a different trigger source for each task.  There is also a property on the DAQmx Create Channel: CO--Pulse Generation VI to set an initial delay in seconds.

Doug M
Applications Engineer
National Instruments

[Kevin_Price]

Doug,

Just want to clarify a point about counter triggers. I had given Irena a different answer in a similar thread and want to know for sure.  The last I knew, only a single trigger could be used for any/all continuous counter tasks, though different "triggers" could be used for the specific case of re-triggerable single pulse generation. Has something changed with recent DAQmx versions? Or was your response meant only to cover the re-triggerable single pulse case?

Thanks for any further info...

-Kevin P.

[Doug M]

Kevin,
To double check, I actually set some hardware up and tried having two contiuous pulse train generation tasks each with a different trigger, and it worked great, so I assume you can have as many triggers as you have tasks for counters.  Thanks for the question.

Doug M