Prob with absolute time

Hii everyone....
I have some questions to ask to u guys...firstly, I'm using serial comm to interface data into labview...There is no prob for configuration...but I have 2 mistakes here.1stly, refer to my table.PNG...I build the table using build table express...so..I enabled the date time.When I run the prog...the date/time didn't fuction anymore...It seems like its stuck with the first read...so...i have tried to open the front panel of the build table express to modify n try to put time stamp..but I think that there is no need to replace it because it had Gate waveform time array.vi already...I tried the other basic simulation to confirm it...but the date from table will run also after I start to run the other prog.
And the other mistake about write to measurement file..the situation was same as above that I tried to show the elapsed time or fractional seconds in the text file at the left side...but it did not happened.that means the fractional seconds always shown as 0.0000 till the target time...
And my last question it...How can I put a gauge and link with the waveform?because here I can't link this gauge icon with the waveform...and lastly,How could I change universal time format of x-axis from the waveform to current time...thank u very much...
Attachments:
text file.PNG ‏32 KB
IIOA test45.vi ‏188 KB
table.PNG ‏57 KB

oh...i'm sorry dennis..i almost forget these thing.Here, I attached my vi n PNG file. Actually I put the gauges 4 my data from my waveform.I think it can be linked with signal without any prob.So, I didn't know that this function just a scalar input. So refer to my table2 PNG. the date / time did not run properly n stuck with the first time/date data...thank u very much
Attachments:
IIOA test518.vi ‏247 KB
table21.PNG ‏35 KB

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[svn:osmf:] 15680: This submission tries to address a bug with absolute time support.

Revision: 15680
Revision: 15680
Author:   [email protected]
Date:     2010-04-23 16:36:42 -0700 (Fri, 23 Apr 2010)
Log Message:
This submission tries to address a bug with absolute time support. As a result, it fixes a bunch of bugs as follows:
FM-765, FM-766, FM-776, FM-777, FM-778, FM-779, FM-780
Ticket Links:
    http://bugs.adobe.com/jira/browse/FM-765
    http://bugs.adobe.com/jira/browse/FM-766
    http://bugs.adobe.com/jira/browse/FM-776
    http://bugs.adobe.com/jira/browse/FM-777
    http://bugs.adobe.com/jira/browse/FM-778
    http://bugs.adobe.com/jira/browse/FM-779
    http://bugs.adobe.com/jira/browse/FM-780
Modified Paths:
    osmf/trunk/framework/OSMF/org/osmf/elements/f4mClasses/DVRInfo.as
    osmf/trunk/framework/OSMF/org/osmf/net/httpstreaming/HTTPNetStream.as
    osmf/trunk/framework/OSMF/org/osmf/net/httpstreaming/f4f/HTTPStreamingF4FIndexHandler.as

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Plot data with absolute time

Why is it that when I plot an array of data to a wavechart and changed the time (x axis) to absolute time, it always display 12/31/1903? Thanks,

Have some patience, most people don't necessarily rush to the internet on the weekend.
To answer your question, LV's time data is represented by the complete number of seconds that have passed since 01/01/1904 00:00 GMT. That means that the number 0, timewise, is that time. Since you are west of Greenwich, you get december 03.
You need to set the starting time for your chart as the current time. You may also need to set the space between each 2 points you plot to the chart. You need to create a property node. Right click on the control or the terminal and select Create>>Property Node. Then, Find the X-Scale>>Offset & Multiplier properties. These set what you need. For offset you should set the current time when you start (use To DBL to convert) and for multiplier the plotting loop speed in seconds (100 ms is 0.1).
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How to schedule with absolute time

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How can you schedule a task to execute at 4:35 p.m (according with the system's clock) every day.
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java.util.concurrent.ScheduledExecutorService
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JoseLuis wrote:Hello,
How can you schedule a task to execute at 4:35 p.m (according with the system's clock) every day.Are you saying that the task needs to be executed at 4:35pm everyday even if the DST has kicked in? Or do you mean after DST kicks in, the task should be executed at the time 5:35pm (in relation to the time before DST)?
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Thanks.You can synchronize time on a machine to get updated with the world clock. Double click on clock at the bottom of your screen.
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Plot numeric waveform with absolute time

Hi all,
This code was working with Labview 2009, but it doesn't seems to work with 2010, do I make something wrong ?
Regards,
V-F
Attachments:
waveform graph.png ‏29 KB

Hi ramses64,
I set up a complete new system.
Then I first installed LabVIEW 2009 (without any Patch)
==> See Screenshot "LV2009_Test.jpg"
Afterwards I installed F3 patch
==> See Screenshot "PatchF3 Update.jpg"
At least I tested your example with LabVIEW 2009 F3
==> See Screenshot "LV2009F3_Test.jpg"
Somehow it doesn't work.
Because of that, I can't go to R&D and show them that behaviour.
Regards
Dippi
Attachments:
LV2009_Test.jpg ‏153 KB
PatchF3 Update.jpg ‏170 KB
LV2009F3_Test.jpg ‏155 KB

How do you add the absolute time and date to a spreadsheet file?

I am creating a spreadsheet file, and I want to write the absolute time and date to its first column. Does anybody know how to do this?
Thank You,

BrianL answer is still valid !
Attached is an example file with an express vi configured to use the absolute time generated from a get time/date node.
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...
Attachments:
Save with absolute time.vi ‏135 KB

DST setting for absolute time in waveform graph

I am using a waveform graph to display some pre-recorded data, with absolute time on the X-axis.
If the time period of the data includes the point at which daylight savings time changes, then this comes out correct on the X-axis i.e. there is a one hour jump in time on the X scale.
But this is only correct if the data is recorded in the same time zone with the same DST settings as the computer used to display the data. If I am viewing data that was recorded in another country, the time on the X scale can come out wrong.
Is there any way to get the graph to ignore the DST setting, so that I don't get the one-hour jump on the X scale?

Hi Scott,
Thanks for your suggestions.
I actually prefer relative time, but other users wanted absolute time so that is why I put it in.
Most of the time it is not going to be a problem - the data is usually analysed by the same people who recorded it, so the times will always come out correct.
But we do have collaborations with people in other countries and swap data files back and forth, so it could get connfusing if the times come out different in different countries.
It would be nice if I could somehow tell the graph what timezone the data was recorded in, and it would display the time correct for that timezone. This would save me from having to change the timezone setting on my computer all the time. But in the mean time, that is what I'll do.
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How to update the absolute time value in waveform chart for labview 6i?

Hey there,
I'm developing a control system using labview 6i on win 2000 os.I'm receiving the sensor data every minute and i want to display the data on a waveform chart with absolute time scale on x-axes. I'm using the property nodes for the offset, multiplier and maximum values putting them outside the while loop and giving them input using get date/time in seconds function. the problem is that the time doesn't gets updated w/ refernce to the computer time and after a certain period the time shown on x-axes lags by several hours. any advise?

Posting an example ussually help us nail these types of issues fast.
I am therfore forced to guess.
Do you have your code written such that the scale operations occur before the loop?
The next thing I have to suspect (not being able to see your code) is if your dt is correct. If your dt is larger than what the chart is set for, then the time will fall behind.
I have included an image showing how the chart can be used to show multiple sample rate plots such that the t0 of the readings are used to control how the readings are displayed. This example uses waveform data types (I believe they were available back in 6i). It should serve as a guide to do what you want.
I suggest you start by recreating the demo and play with it until you have what
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The beauty of this method is it lets you use the chart to plot signals acquired at different frequecies and plot them all together.
reply to this answer if you have questions,
Ben
Ben Rayner
Certified LabVIEW Developer
www.DSAutomation.com
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction
Attachments:
Wform_demo.bmp ‏427 KB

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I am trying to make a chart of temperature values with absolute time. First, the timing seems to be a little off and second, I would like to display an hour of data and then have it write over itself so it is always displaying the last hour of data. It would be nice to be able to scroll through a day or two of data, but not neccessary. I have attached my code from Labview 2010. Could you please help me modify my code to do this? Thank you in advance for your help.
Solved!
Go to Solution.
Attachments:
Temp_Graph_Not_Working.vi ‏14 KB

Hi danjneff,
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Use the history property node.
This is explained in an example VI to be found in the example finder…
I am pretty new with LabVIEW so don't understand your answer to the x-axis question
Again: as you are new to labVIEW you should take all those FREE online courses offered by NI on their website!
Would it be easier for me to use a graph?
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I wanted to execute a EEM script at a certain time, 2015-05-04 03:00:00 GMT+2:00. So I used the "event timer absolute time" command.
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IOS: 15.0(2)SE4
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I used this link to calcute the timer value. http://www.epochconverter.com/

I honestly have never seen anyone use this timer. You'd be better off using cron and removing the applet when it's done.
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I had a problem with imac screen going black. apple store diagnosed prob with video card which they replaced. Brought it home, turned it on (have done this 4 times) it starts up, wheel turns, there is a long bar at bottom which fills up, then it turns off

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How to display multiple waveforms (more than 2) with current time on x axis

Dear All,
I am trying to plot more than 2 waveforms on a graph/chart with current absolute time on the x-axis.
It works if I plot two waveforms on XY graph but shows broken wires (mismatching of data types) for more than 2 waveforms.
Now, I have tried waveform charts and graphs, and ti doesnt work there too.
I have attached my VI below.
Can someone please help me out with this.
Attachments:
timing problem.vi ‏21 KB

Dear Mahu,
I have attached a snapshot of my VI. This snapshot shows a VI which works perfectly but as soon as you will extend the bundle and add another random number generator, it will show data mismatching.
The reason why I am not using a chart, although it works perfectly for this, is beacuse I want to control the x axis (start and end time) to see data at time as specified by user.
Waiting for your reply.
Attachments:
pic of prob.JPG ‏46 KB

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Create an absolute time display that can be paused and scrolled

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Any ideas?
AUTOM8

Hi,
You can use the Get date/time function to get time when the data is recorded. However be advised that this time would only be close to the actual time of data acquisition. It will not be the actual time when the data was acquired.
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Regards,
Ankita

Prob with absolute time

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