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emer
Member
03-01-2005 08:04 AM
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i need to sample 4 input signals as fast as possible, process the data and generate 2 outputs.
the problems i am encountering are:
I had a look at the example you sent me but I don't fully understand it and as I have time constraints I need finish my Labview project as soon as possible.
I have set up the input DAQ Assistant to samples to read = 1, continuous and frequency 1000Hz.
Is this the fastest rate to input data for my system?
I am unsure as to how the outputs should be configured. Is the method I'm using correct? or is there a better approach to output the data?
To allow the data be manipulated by a formula, the data is passing through a CDD (CONVERT TO DYNAMIC DATA) and the to an eval parsed formula string. Is the formula being performed on all my necessary input samples using this method?
Lastly, logging the data: When I check the input data log, with samples to read = 100 the timing column corresponds to the amount of time I let the system run for but when I change the DAQ Assistant to samples to read = 1, the timing no longer corresponds to rel time. e.g. if I let it run for 10 seconds the timing shows:0.001, 0.002 etc. but then it goes from 0.34 to 10.396???
Also the timing for the output log does not show any times corresponding to outputs.
Any help would be great,
Thanks
http://forums.ni.com/attachments/ni/170/108778/1/code.vi
the problems i am encountering are:
I had a look at the example you sent me but I don't fully understand it and as I have time constraints I need finish my Labview project as soon as possible.
I have set up the input DAQ Assistant to samples to read = 1, continuous and frequency 1000Hz.
Is this the fastest rate to input data for my system?
I am unsure as to how the outputs should be configured. Is the method I'm using correct? or is there a better approach to output the data?
To allow the data be manipulated by a formula, the data is passing through a CDD (CONVERT TO DYNAMIC DATA) and the to an eval parsed formula string. Is the formula being performed on all my necessary input samples using this method?
Lastly, logging the data: When I check the input data log, with samples to read = 100 the timing column corresponds to the amount of time I let the system run for but when I change the DAQ Assistant to samples to read = 1, the timing no longer corresponds to rel time. e.g. if I let it run for 10 seconds the timing shows:0.001, 0.002 etc. but then it goes from 0.34 to 10.396???
Also the timing for the output log does not show any times corresponding to outputs.
Any help would be great,
Thanks
http://forums.ni.com/attachments/ni/170/108778/1/code.vi
George M.
Active Participant
03-21-2005 04:21 PM
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Hi,
I see that you had some questions that have not been answered a while ago, but it also sounded like you were under time constraints. Were you able to look over the material posted in the previous posts to figure out what is going on, or are you still having trouble. If you are no longer concerned about this, please disregard this post.
George
I see that you had some questions that have not been answered a while ago, but it also sounded like you were under time constraints. Were you able to look over the material posted in the previous posts to figure out what is going on, or are you still having trouble. If you are no longer concerned about this, please disregard this post.
George
