Recording universal time along with dynamic data

Hey guys, basic question.
I have a single pressure transducer that I'm recording data from. I want to have a single button that the user can press to start recording and have the same button stop recording. I suppse the catch is that as the user, I would like to see periodic updates from the what the DAQ assistant is seeing.
The problem I'm having is that the time stamp in the recorded data file repeats for every cycle of the DAQ assistant. Meaning, if I record two cycles at 5 Hz and at 5 samples, my time stamp goes from 0,.2,.4,.6,.8,0,.2,.4,.6,.8. See it repeats. Ideally I'd like it to go like this 0,.2,.4,.6,.8,1,1.2,1.4,1.6,1.8. I'm attached the VI and sample output. I appreciate any help you guys can provide.
John
Solved!
Go to Solution.
Attachments:
single_transducer.vi ‏88 KB
testoutput.txt ‏1 KB

How are you running your VI?
It only runs one time them stops. It doesn't have a while loop for multiple iterations.
Please don't tell me you are using the Run Continuous button and the Abort button. They are only for debugging purposes.
If you put a while loop around your code and use a real stop button on your Front panel, you'll see it works just fine. Run Continuous is not the same as a while loop. It is more like, run, run again, run again, run again, always restarting the VI until you hit the abort button which is what is causing your time stamps to restart.

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Need help for storing time along with the date

Hi,
I have one procedure as follows, In last_update_column of the table job_data having date and time.But after execution of this procedure only date is inserting into the job_master.
If I queires the table job_master with to_char(Last_Update_Date, 'DD-MM-YYYY HH24:MI:SS') , then it is showing time as 12:00:00.
I tried to insert date with to_char,to_date format but it is not working.
Please provide me the solution.
Thanks in advance.
create or replace
PROCEDURE         SP_LOAD_JOB
IS
CURSOR CUR_DATA IS
        SELECT   PARENT_ITEM,
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FROM job_data,
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For Cursor_job In CUR_DATA
             Loop
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values(
                         Cursor_job.PARENT_ITEM,
                         Cursor_job.CHILD_ITEM_ID, ,
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commit;
end loop;
END;

Hi,
I don't believe you
First to input time to job_master from job_data table first you have to store time in job_data.
execute
select LAST_UPDATE_DATE from job_data
and show result.
Second remark : your procedure will not compile success Because
    Insert Into job_master(parent_Code,
                                   child_code,
                                   last_update_date) ---3columns
   values(
                         Cursor_job.PARENT_ITEM,
                         Cursor_job.CHILD_ITEM_ID, ,
                         Cursor_job.Assembly_Item_Id,
                          Cursor_Bom.LAST_UPDATE_DATE) ----4columns
Third remark : why to insert into table from other you wrote procedure???! you need only type insert stmt like this
    Insert Into job_master(parent_Code,
                                   child_code,
                                   last_update_date)
    select .... from job_data
Ramin Hashimzade

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When using a collector I have found that it significantly slows down my loop times. I am using LabView7.1 on a Dell PC with Windows XP. If I use a queue with dynamic data do you think that will require less of my processor and allow for faster loop speeds?
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Hi Dennis,
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Hope it helps,
Pelle S
District Sales Manager
National Instruments Sweden
Attachments:
Dynamic queue.vi ‏245 KB

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Katherine Xiong
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<tlib-version>1.0</tlib-version>
<jsp-version>1.2</jsp-version>
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<name>getCalendar</name>
<tag-class>taglib.PrintCalendar</tag-class>
<body-content>JSP</body-content>
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</attribute>
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<required>true/false</required>
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</attribute>
</tag>
</taglib>

How to call javascript function with dynamic data in display tag

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Hi,
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How to get Header data into multiple times along with the Line Items

Dear All,
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Example
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Dear Ramarao,
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I am looking for how to run a job in the background on a Daily basis where the data time range is always Yesterday - specifically, I want to run a Notification report daily to see the previous day's notifications.
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Dear Richard,
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What's wrong with dynamic data?

I am starting this thread to showcase what I might call "dynamic data abuse": The use of dynamic data where it has no business to be used (does it ever?).
Everybody is invited to contribute with their own examples!
One of the problems when operating on dynamic data is its opacity. We can never really tell what's going on by looking at the code. It also seems to hide serious programming mistakes by adapting in ways to mask horrendous code and making it seemingly functional, glossing over the glaring programming errors.
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(A)
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(B)
(seen here)
What's wrong with simply branching the wire???
(C)
I don't remember the link, but here's how somebody transposed a 2D array a while ago (bottom part of image). No way to tell from looking at the code picture! (The "FromDDT" and "ToDDT" need to be configured just right ...).
ARRRRGH!
LabVIEW Champion . Do more with less code and in less time .
Attachments:
join.png ‏2 KB
split.png ‏3 KB
DynamicTranspose.png ‏18 KB

Here's another one for you. Found here:http://forums.ni.com/t5/LabVIEW/Program-unresponsive-after-a-dialog-box-input/m-p/2447608#U2447608
Put a bunch of booleans into a Combine Signals and then do a Dynamic Data to Boolean Array.
I supplied the much more cleaned up version of the code below.
EDIT: I just realized I needed to subtract 1 frm the power before using the Scale by Power of 2. Oops.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines
Attachments:
Button Press Decoder_BD.png ‏41 KB

Compare daqmx event with dynamic data

Good evening everyone!
Our project is now facing a problem with LabView.
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Could anybody help me with this question? How can I extract the value inside the task out for DAQmx or convert daqmx event to dynamic data directly ??

So you changed your DAQ Assistant to attempt to use the DAQmx API. Normally, I would say "Good for you". But if the code was working, why change it?
Mimic what I did with the Analog Output. See how I configured before the loop, wrote inside the loop, and closed after the loop? You should do the same thing with the Analog Input, except you do a DAQmx Read instead of a write.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

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Hi,
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Hi Ingo,
I tried running the standard test MDX in MDXTEST and I got the data for those calculations.
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Time stamp from dynamic data

I trying to write dynamic data to a file using Express VI (Write LabView Measurement file). The dynamic data comes straight from a simulated Signal Express VI. The signal part of the dynamic data is written correctly but the time stamp is what appears to be float counting the seconds since the Write LabView Measurement file Express VI was started.
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Thanks,
Soren T. Jensen

The timestamp is written in the header of the file. The time and date entered there is the time and date that you are looking for. The timestamp written next to each piece of data is indead a relative value. It is the delta from the timestamp in the header to the time that datum was collected (created). The reason for this is that timestamps are quite large in bytes, especially if you break out the time and date in strings. Just stamping the header and providing the offsets is much more efficient.
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Bob Young - Test Engineer - Lapsed Certified LabVIEW Developer
DISTek Integration, Inc. - NI Alliance Member
mailto:[email protected]

Recording universal time along with dynamic data

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