Question about waveform chart time scale

Hello,
I have question regarding to time scale on my chart, I want it to show the actual measured time, for example from 0-30 seconds, but instead my minimum value is 302654789854 . Please help me to fix it.
Regards ,
Stella Deheryan

You can modify the way the time is displayed on the axis by right clicking the chart and selecting properties. On the display format tab, select relative time. This should show the X-axis scale as HH:MM. Or pick any other type of formatting you want.
Best Regards
Michiel
Applications Engineer
NI Belgium
http://www.ni.com/ask

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Problem with waveform chart: time scale does not show time correctly

Hello,
I have some problems with a chart.
I want to display some data and the time between two single data can vary. It is something between 50ms and 500 ms.
The problems I have:
1. The time is not shown correctly in the chart (allways 2:00:10 instead of the current time)
2. the data points in the chart have a distance of 1 s (x-scale). That is not correct.
I have tried several things but I thinkt I am on the wrong track.
Could you please help me?
Johannes
LabVIEW 7.1 (!)
Message Edited by johanneshoer on 10-14-2009 04:26 AM
Greetings Johannes
Using LabVIEW 7.1 and 2009 recently
Solved!
Go to Solution.
Attachments:
Chart Test.vi ‏55 KB

I have modifierd the vi again.
Now it looks much better.
I have a data array and the last 10 seconds of the data are displayed.
The array size is maximum 150 and that is more than I need to display. If new data is inserted, the oldest gets deleted.
I wonder if this style is efficient?
The time is stil not displayed correctly in the graph. Why does it always show 2:00:00 ?
Johanens
LabVIEW 7.1
Greetings Johannes
Using LabVIEW 7.1 and 2009 recently
Attachments:
Chart Test 3.vi ‏57 KB

How to display on the graph three or more waveforms where time scale is not an index of array but a real time

How to display on the graph three or more waveforms where time scale is not an index of array but a real time:
I measure three voltages Va, Vb, and Vc on my Test stands every 3sec. So I’m building four arrays (Va, Vb, Vc, Time) and combine all in one.
Time
Va
Vb
Vc
0
5
3.5
2.8
3
4.9
3.6
2.9
6
4.8
3.8
2.1
Now I need to show on the graph in which scale X is “Voltage” and scale Y is “Time”.
How can I do it?
Thanks a lot,
Boris

Hi, thanks all your reply.
You may find "points_to_bar_graph.vi" from this website, I find it by this way.
I will ask a stupid question: I don't have any photo processing software, how can I save the vi into a picture format?
So here I just paste it into word document.
Attachments:
question.doc ‏520 KB
points_to_bar_graph.vi ‏62 KB

Gant Chart time scale on quarterly basis

Hi All,
My requirement is display of Gant chart time scale on Quarterly basis. Currently it is coming month basis.
Can you please suggest me settings.
Thanks in advance
Regards

in CJ2B select
Settings > options
and adjust graphic as you required and save the node while exiting..

Question from waveform chart

Hi,
this must be a simple question, but I want to "fix" time axis "between 0sec and 10sec" although the running time of my vi is more than 100 sec, i.e., I want to reset the waveform chart every 10sec. Please help me out thanks.

Maybe this is what you want : just configure your waveform chart to "scope chart" (right click on chart then "advanced" and "update mode")
See attached picture.
regards,
xavier
Attachments:
Exemple.jpg ‏90 KB

Problem with Waveform Chart X scale

Hi guys.
I am new here and Labview, sorry for my english wrongs. I am from Brazil.
So, i try have an absolute time in x scale, from my waveform chart, but the VI don't execute this. I wish make like the picture in annex. It´s the only problem in my project.
I Use Labview 8.6 version.
Please help me
Icaro Kossmann
LabVIEW 8.6 Newbie.
Brazil
Attachments:
tela labview.png ‏46 KB

Kossmann wrote:
This is a print of block diagram with a close in waveform chart.
Your chart does not get any timing information, thus you need to set the dt manually or with a property node according to the update rate of your code (we cannot tell from the picture).
If you want absolute time, you also need to set the t0 according to the start time of the chart. Then you also need to select the desired time format of the axis.
(It really does not help to show us code pictures. I recommend you attach the actual VI.)
Kossmann wrote:
The datatype is 14 channel with single precision, and the format of the x-axis is absolute time, but, the VI don´t show it. And i wish to show divisions on each 5 min.
Instead of telling us what it does not show, tell us what is shows instead and what's wrong with it.
LabVIEW Champion . Do more with less code and in less time .

A question about Waveform graph

Hello everyone.. I have made a waveform graph to measure pressure with my DAQ NI-9237. The problem is the time value in the x-axis shown on the picture below. It only shows the measurements from 0 to 1, but i need from 0 to 4 seconds.
Thanks in advance
Oesen
Best regards
Oesen

Hi Oesen.
It's because you convert your data to a double, which does not contain any information about the time. Instead, simply delete the 'Convert from Dynamic Data' and wire in the dynamic data directly to the chart. The Waveform Chart supports this datatype as well.
Another solution is to keep the 'Convert from Dynamic Data', but instead of converting the data to doubles, you convert to a waveform. You do this by dobbel-clicking on the function and select 'Single Waveform' in the list. I personally think this is the best solution, since you are now able to work with your data in a way the dynamic datatype won't allow you. Try and wire the waveform to 'Get Waveform Components' and see how data is stored.
You can read more about the waveform datatype here:
Using the Waveform Data Type in LabVIEW
http://digital.ni.com/public.nsf/allkb/B965F316364DE17B862572DF00363B10
I hope this information is helpful.
Best Regards
Alex E. Petersen
Certified LabVIEW Developer (CLD)
Application Engineer
Image House PantoInspect

Waveform chart time axis is not matching the waveform data

So here an interesting conundrum I hope you might be able to help me with...
My VI has waveform data sent to a chart, though the data is not being plotted against the current time. Rather, it is being plotted starting way back in the reference time (way back in 1903). I don't understand why this is happening. When I build the waveform, I use the "Get Date/Time in Seconds" function outside the while loop and feed that into my "Build Waveform" Function as the t0 value. My dt value is 0.05 (20 Hz) and then I feed in my array of data in the Y input. Any ideas why the chart is plotting this data over 100 years ago? Thanks!
Andrew

Hiii, Ronin
Here is your solution.
By default, waveform charts and graphs display the absolute time at time 0 as 7:00:00 PM, 12/31/1903 on a Windows based system. Property nodes can be used to get the correct absolute time to display on the x-axis of the waveform chart.
First, right click the chart on the front panel and select X Scale >> Formatting. Then set the format to Absolute Time.
Create a property node for the waveform chart by right-clicking on the chart on the block diagram and selecting Create >> Property Node. Expand the property node to display two properties. Select the Format property and the Offset property. The Format property is located under X-Scale >> Format and Precision >> Format, and the Offset property can be found under X-Scale >> Offset and Multiplier >> Offset. Right click on the property node and select Change All to Write.
For the Format property, the context help shows that there are multiple inputs to this property. Wire in a value of 7 to set the format to Time and Date.For the Offset property, first wire the output of the Get Data/Time in Seconds VI to the input of the To Double Precision Float VI. Then wire the output of the To Double Precision Float VI to the Offset property.
In addition, if you know the number of data points plotted to the chart per second, you can set the Multiplier property located under X-Scale >> Offset and Multiplier >> Multiplier. If there are x data points generated per second, wire in a value of 1/x to the Multiplier property. A simple example program "Chart with Timestamp" that demonstrates how to do that is attached.
Thanks,
Nishant
Attachments:
Chart with Timestamp.vi ‏36 KB

Question about waveform...

Hi.. is me @ again....
this time i wish to know something about waveform...
erm... who can let me know about the setting x-axis??? i wish to do the seeting same as the picture below...
hope somebody can help me...
Jaxx
Attachments:
question.jpg ‏9 KB

Right-click on your waveform graph and select "properties".
Now Go to the "Format and Precision" tab, select "X-axis, relative time, HH:MMS". Click OK.
(If you want exactly the range shown, disable autoscaling and enter 00:00:09 in the rightmost tick mark)
LabVIEW Champion . Do more with less code and in less time .

Waveform chart time sometimes decreases

I have a waveform chart with three plots vs time with update mode set to strip chart. It is demonstrating strange behavior which I have never noticed before. The time sample numbers at the extents of the axis sometimes decrease and the plots shift to the right instead of always left as I have always expected. Can anyone offer a plausible reason why this situation might occur?

the following applies only to charts that are Waveform data types, otherwise disregard.
Check the validity of the t0 values in the WF. If the timestamp is earler than the latest value plotted, the chart will reset.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Question about extend calendar using scal? help,help

recently, we received a mail from sap which saying about extending calendar using scal;
I have read sap notes:1529649 , 501670
and my steps will be:
1> in our qas system using scal
change holiday calendar: choose CN China holiday calendar to change and then enter validation from 1995 to 2098(for example)
2> change factory calendar: choose CN China factory calendar to change and then enter validation from 1995 to 2098(for example)
3> in scal , choose menu: extras-->update calendar buffer
4> transport this change to our prd system.
5> go to scal in prd system to check
6> update prd system `s calendar buffer in scal
I do know whether my steps is right?
I have two questions:
1> we are a chinese compary, and we use several languages:TRADITIONAL CHINESE , SIMPLIFIED CHINESE and ENGLISH;
whether i should change other holiday calendar,such as british calendar?
2> Is there something wrong about my steps?
thanks a lot.
Edited by: victor on Nov 29, 2010 6:17 AM

Hi,
You are correct, But You can change it on QAS due to client will not modifiable.
Goto Developement System and run scal.
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Rgds
dk

Waveform chart Y scale overlap problem

Hi all,
Attached vi (in LV8) tells my problem.
Hope I will get solution.Thanks in adv.
Kousy
Attachments:
Trial_graph.vi ‏19 KB

Hi David,
"I have had this kind of chart with nine plots earlier. - That chart functions Ok when Im running it as separate VI.
But when I call this from Main and load onto my subpanel, THESE Y Sclaes getting into mess (overlapping one
scale on the other), even with selection of 2-3 check boxes itself. I thought 'Use Minimum field width" in Format
& Precision tab will help. Even then its getting overlapped. - This is one problem." - This VI developed in LV7.1
I cannot run the application without hardware, hence i run it as separate vi and captured the attached images.
Update plot button value change event, reads the waveform file from disk and depends on the selected check box, it makes visible or invisible the corresponding Y scales and shows the actual plot onto the chart.
"Now I have created the same kind of chart for 7 channels'plot, shown above.
I have done like this - I have created one plot with name of Temp. And i added reqd. no. of plots
and duplicated the Y scales relevant. So now I have chart with 7 Plots. So far so good.
Now I like to add minimum field width for all 7 plots & precision for Channel 4 as mentioned in (**) But it shows the min.
field width to all plots, once i proceed with that and go on to change the precision for 4th channel, causes confusion by
showing the precision to 7th channel (Torque). I dont know where im making mistake & how should i correct it" - This is developed in LV8.0, attached VI of my earlier post.
Attachments:
Prob_1.JPG ‏96 KB
Prob_2.JPG ‏87 KB

Question about restoring from Time Machine backup because of new SSD

Hi,
I have a 15" Late 2011 MacBook Pro running 10.10.1 with a Toshiba hard drive inside. I want to replace the Toshiba HDD with a Crucial MX100 SSD. I use a Time Capsule to backup. After I install the SSD, I would want to restore my data to the new SSD using my Time Capsule, but I have a few questions:
1) My Mac shipped with OS X 10.7; My Mac is running OS X 10.10.1; Should I use Internet Recovery to start the restore (even though when I start OS X Internet Recovery it will download 10.7 recovery), or should I use a USB drive to start Recovery?
2) After booting into Recovery, do I format/partition the SSD into 1 partition, GUID partition table, Mac OS Extended Journaled, etc before restoring using Time Capsule?
3) Do I need to use Trim? Please tell me your opinion on the OS X Yosemite and Cindori Trim Enabler controversy.
4) How do I install Recovery HD on my new SSD?
5) Please tell me all tips you have about this entire process.
Thanks,
Mike

The ability to load OS X Internet Recovery is provided by firmware independent of the SSD. Just make sure your MBP has the latest firmware, which was released years ago.
You won't need a separate step to install OS X. Answered more completely in (2).
Merely format the SSD Use Mac OS X Extended (Journaled) and as many partitions as you desire. One is sufficient.
Only Crucial can answer that. You might be better off purchasing a SSD from a company known to support Macs, such as OWC / MacSales. I have several of their SSD products and haven't had to devote a moment of thought to Trim.
That's done by virtue of the Recovery firmware. It will recognize that no Recovery partition exists and will create one, after which you won't have to use OS X Internet Recovery (though it will remain an option).
If you obtain your SSD from OWC that's really all you need to know. Mechanically, it's not much more complicated than installing memory. As far as recovering the original HD's contents, restoring from the Time Machine backup is also straightforward. TM doesn't know and doesn't care that it's a SSD.

About waveform chart

hello ,
actually i want to ask that how can i change the data format of the
Waveform graph, by defult it shows as DBL but i want to change it to
cluster icon or SGL etc..
if any one cant understand my point plz look at the attach image i want to change it like that.
thanx
Attachments:
waveform graph.JPG ‏57 KB

The waveform graph terminal will automatically adapt to whatever datatype you wire to it. Just wire waveform data to it and it will change apperance and functionality accordingly.
LabVIEW Champion . Do more with less code and in less time .

Question about strip charts

My question is quite simple:
I have a sequence, with let say 2 frames, in each one of them, there is a loop in which data flows. I have created a strip chart which plot the data from the first loop.
What I want:
I would like to keep the same chart so that when the loop in 1 is over, it starts plotting the data from the second loop.
Thank you,
Noel
and in similarly, I would like to know how to use one numeric input and use it in 2 different loops without having to make the wire go all around the VI.
Message Edited by Akatsuki on 11-28-2005 05:35 PM

Sorry,
herez the VI ;-)
Attachments:
2loop _chart.vi ‏27 KB

Question about waveform chart time scale

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