daqmx

[d_2014]

hello all,

i am new to labview. a month ago i started using it. i want to read paralle data from PCI-6534. i am getting this data and succesfullly graph it. but when i use external trigger it shows error. plz help me through this.

i am attaching both files here.

thanks in advance... 

[GerdW]

Hi d,

do you mind to clean up your VI before uploading any pictures of the block diagram? All those crossing lines hurt my eyes…

Which error do you get?

Did you supply an external trigger to start/trigger your measurement?

[d_2014]

hie GerdW..

sorry for dirty snapshots... i am attaching files again here. i am getting error 200284.

[GerdW]

Hi d,

did you read the explanation of that error number?

That's why I asked you: Did you REALLY supply an external clock?

[d_2014]

hey all.. in my first post i wrote i used external trigger.. but i am using it as external clock... sorry for inconvenience.

[d_2014]

hey GerdW

i tried 10KHz and 50 KHz pulse from my signal generator. and initially i want 50 samples to verify code.

[crossrulz]

Add a wait between the starting of the task and trying to read.  You are trying to read before the trigger is even found.

Also, since you are dealing with Finite samples, you should wire up the Samples Per Channel on the DAQmx Timing VI.  Just use the same terminal as the number of samples to read you have wired to your DAQmx Read.

[d_2014]

hey crossrulz,

i connected samples per channel as per your suggestion but plz tell me wht kind of wait i have to add. finally i have to take this data rate to some of KB. so plz suggest me.

[d_2014]

hey crossrulz..

i add delay block here and giving 50 KHz square wave as clock.. though i am not getting anything it runs in loop.. plz plz help me here.... i am attaching vi also so plz look in it and tell me 

[d_2014]

hey all, i tried this vi. it gives result sometimes but take more time and sometime give garbage. can any one suggest method to sure that it read data on edge without any garbage..

thanks in advance..