How to generate pulses on the digital i/o lines? USB-6211 labview 8.5
I want to generate a 5ms pulse on one of the lines of digital output that will be more used to delay the acquisition, DAQ.
Thank you
You will need to use counters to generate a digital pulse. I ask you to take a look in the examples that come with the DAQmx driver (in LabVIEW, help goto-> find examples). You can look for impulses and select generate Dig Pulse.vi. If you have questions, after return!
Tags: NI Hardware
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After watching your upgrade. All your writing VI should use the same task. There is no need to close this task until the end of the program. In addition, you can remove all the time because they do not allow the task close a loop. I did a performance highlighted with your code and you can see that the first task was not allowed at the time wherever the data reached the second task. When you try to create the second task, the error is generated. Because you do not give me multiple writes to the same port there is no need to open and close the task each time. Here is a link that will explain a little more about the DAQmx driver works.
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Salvation;
Here is the solution for your problem.
The cause is that "Gen dig Pulse Train-Finite" uses Ctr0 both Ctr1.
Please refer to:
"When you do a finite pulse train generation, a counter generates pulse train, and the other counter generates an impulse that acts as a barrier to the first counter. If you change the pulse train to generate continuously or
only generate a pulse, you can run two tasks of meter at the same time without error. »
http://digital.NI.com/public.nsf/allkb/04BEDD9E9E91ED3486256D180048116D
I used Ctr0 and Ctr2, jumping Ctr1 as it is reserved by "" Gen dig Pulse Train-Finite ". I works very well.
Kizito.
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