Similar Questions

• How to trace the temperature and voltage using the graph of Mixed Signal

  Hello

  I use the NOR cDAQ-9178, module NI 9214 (temperature) and the module NI 9201 (voltage). My program allows the user to choose among 3 different tasks, Masurement of temperature, voltage, or both. When you select the task for temperature and voltage measurement, I was drawing all channels on the same graph. I was invited to separate channels of temperature and voltage and draw on a split graph, using the same category axis. I tried stacking, but could not control where each parcel channel went. I think the Mixed Signal graph would work well. Everything works and records all the data of the channels to the files, but my plots appear not on the graph, although I can see the change in scale numbers. I think I can use the cluster incorrectly. Can someone tell me what I am doing wrong? I selected the 'Plot Visible' option, but the plot is not always displayed. I've attached a zip with all the screws needed to run my program. The main VI is "Voltage_Temperature_SingleTask_Measurements_MAIN.vi"... but everything must be downloaded to the program works. Please help... Thank you.

  Hi mzhlb,

  I complained only the expressVIs.

  

  Why not use simple IndexArray function to get bots waveforms of your waveform table? (I faked it your DAQmxRead with functions SigGen).

• How is - I size the Group zone oin the graph of mixed signals to meet my signal names?

  I have a graph simple signal mixed and I programmed my signal names and they are longer than the width of the component group existing on the subject, and I want them to be visible.  How can I resize the graphic components because I wrote the names to the object?  I know that I can personalize the thing, but y at - it a method or a property that I'm missing here?

  It seems that it is a known problem. You can change the size of the legend by using a property node for waveform graphs, but not for a graph of mixed signals.  A good work-around would be to right-click the gray bar between the legend and the plot area until your pointer changes to the resize tool.  You can then size it is large enough to show the whole legend.  It is a question that is configured to be resolved in future versions of LabVIEW.

• Mixed signals with the buffer graph.

  Hi I'm new to LabView and I have a really basic question.

  Here's what I'm trying to do.

  1. I use chart of the mixed signals to display some acquired DAQmx signals.

  2. I have 3 separate field areas.

  3 X - axes of these areas of land must be completely in Sync.

  that is the main reason why I want to use graph of mixed signals.

  4. I want that signals are displayed as table of waveform,

  It's the waveform data are not deleted during update

  and I can scroll to watch old stuff.

  5. I also want to save the data as numbers of I can also

  do all sorts of calculations with them.

  Now with my vi, the graph gets refreshed and crushed

  each sampling period and only a small fraction of the data I want is

  shown on the screen. (I want to these fractions to get annexed by)

  order of chlonological...)

  I guess that it is a fairly common problem for a beginner.

  I could easily do in C or Java, but rather difficult to do on the GUI.

  Any help will be appreciated

  Thank you!

  If you want to see the temporal evolution of your chart, simply change the x-axis not autoscale under properties of the graph. You can use align your waveform in programming > wave > align times. You can activate the option to scroll by right clicking on the graph > visible elements > graphic palette.

  There are many options for data backup. The quick and dirty is to enable indexing of your time loop and thread to write on the worksheet to the title of programming > e/s file > write in the spreadsheet file. Keep in mind that the file is a txt file.

  Post your code for help.

• Mixed signal graph - data digital unable to see on the graph

  Hello

  I'm tracing analog and digital data on the graph of mixed signals. I'm not able to see numbers on the graph, but when I export data to excel it shows all digital plots also. According to me, Miss me some settings.

  Please check attached VI for reference and let me know if anyone knows the solution

  Kind regards

  Jaysha

  I changed the frequency of sampling to '1 '.

  

• How to display the signal on a waveform graph in Labview Signal Express?

  Hello

  I want to display a signal in Signal Express 3.0 in a "waveform table", but don't know how to do it and I think that it may be impossible?

  In Labview, there are two ways to view data, a 'waveform table' or a 'waveform graph. The great thing with 'picture of waveform' is that it allows you to set a length of history and you can see the data move to the left (option graphic strip) that samples are recovered. It works perfectly.

  In Signal Express I can only select "Graph XY" or "Waveform curve" by doing a right-click of the mouse, but I can't select "table of waveform. Is it really true that it is not possible to view data in a graph of waveform "with Labview? (1 analog signal during streaming, 100 samples to read at the rate of 1 K)

  Thank you in advance,

  Enrique

  Hi Enrique.

  You are right that there is currently no graphic waveform in SignalExpress. The thing nearest you can join, is saved data under a log and then he looks one when recording (which I know this isn't quite the same interactive behavior).

  For your last comment, you wrote 'waveform curve', but I guess you meant 'picture' here as well.

  Sorry about that. We recently received this request, then perhaps in a future version.

  Phil

• Extraction of subset of mixed-signal graph table

  When you zoom in on a graph of mixed signals, is it a property node to get the min and max index in the array of signal, instead of the minimum xscale and the maximum value of xcale?

  Indeed!

  Thank you

• mixed-signal graph size automatic

  This seems simple, but is there an option that will automatically format all the graphs on my graph of Mixed Signal to the size of my VI? For example, if I increase and decrease the size, the graphics remain a constant size and I would scroll to see them. Secondly, that all graphs have the same vertical height, instead of me manually by dragging the separator to try to make all equal in size?

  Right click possibility and also space all the graphs and auto fit all graphs would be very practical! I can't find the option for her.

  Image attached showing the spacing I'm talking about.

  Thank you!

  Hello

  This can be done programmatically with the nodes property.  The trick is to use two nodes of different property of the to do.

  We must first define whatever parcel we want change to be the active plot by using the Active plot area property node.  We can then define the limits of this plot by using the node property parcel size of the area, which is located under plot area > size.

  

  Good luck!

• How to reset the graph of mixed signals automatically?

  How do you resets a graph of mixed signals automatically?

  My idea is like that - I'm drawing a chart throughout the day... Then, at 19:00, I want the chart to erase. There will be a break until 06:00. It will therefore start a new graph at 06:00. How can I do this? It seems easy, but I can't find the solution. Thanks in advance!

  redhotsneakers wrote:

  Why local variables are useless?

  It's a missquote, I'm afraid: I didn't say local variables are unnecessary, even if some would align themselves with this statement. I said that they are in your case. In VI you have published everything first, you are passing data from local variable that can be better spent by wire sind, the variables are literally next to each other. While you might get lucky in a program of this size, it can cause a world of problems in a larger application.

  Back to your problem: after watching your new VI, I'd say you're almost there. Separate features in the two loops does not seem necessary. Instead of the value property, you can try the method reinitialize I mentioned earlier, that should do it.

  Then you can add a feature that reinitilizes only once by comparing the range in the previous iteration.

  BTW: this select function is code of rube goldberg. Why not use the Boolean result of the node equal to the cases.

• How to dynamically add a plot to a graph of mixed signals

  I have a graph of mixed signals where I'm plotting a signal from a time axis. I'm trying to dynamically add a second plot to this graph against the same time axis (with a different scale of Y), but when I built a 2D array and try to connect in the graph (using a local variable) I get an error of size mismatch. I know for sure I did in the past (cable tables with different sizes for a same MSG) with no problems but, today, for some reason any I can't solve this problem.

  Am I missing something?

  Yes, you're probably writing a table 1 d somewhere that is causing to accept only 1 d. To address your problem above, just put a table node build in whenever you have a 1 d table and it will be just a 2D array with a single line of data.

  To add a field to your current locations, your screenshot above should work once the plot knows that he has to accept the 2D tables.

  Reading from a local variable, change something and then write about it once again can lead to a lot of issues down the line. Race conditions are a pain in the butt, so get rid of that sort of thing is good to do from the start. I didn't know the rest of your code, so I don't know how you treat it, but just keep in mind that you add to your software.

• graph of the mixed signals on wrong tab

  I have alarge program. In one of the screws sub in the first run a graph of mixed signal appears on the wrong tab. If I clict on the second tab, whaere graph must be, it seems normal. If I go back to the first, the ghost of the chart image is gone.

  Also, if I left the program normally process in the second executionl, the ghost image disappeared.

  Y at - there anythign I can do to stop this behavior?

  I already tried to reinstall previous versions od my software, but it continues to be.

  
  

• Merge the signals and waveform graph

  Hi all

  I ask you what follows, because I have little knowledge about labview

  I have a function of merging signals which should take 7 signal as input. but I have no idea how to do to see the 7 signal on a waveform graph outputs. I want to show the 7 signals each of them on a waveform graph. (like research in the panet before I would see an array of unique waveform showing the 7 signals).

  can you guys help me?

  Thank you.

  I'm confused for... Please find attached a really simple screw that does the job you want...

  Are you tracing the curve of a graph or a chart? My VI control is a chart.

• graph of mixed signals of compensation with 2 areas of land

  I have a graph of mixed signals from zone 2 simple plot.  When I try to reset or clear the chart by writing a 0 to it dashboard, it bombards.  Anyone know what is wrong here?  Seems like it should be essential to the functioning of this object.

  It's seems to work for this case.  However, I had tried in the past and he had problems with some things too.  I even had the code still there to generate an array of the same size, but what makes all 0, but it was not connected to the entry of the chart in my code now.  Instead, the chart was hard wired to a constant with a single element to a value of 0 0.0.   We can call it a success so far.  Thank you

• Programmatically formatting graphic mixed signals

  I am writing an FPGA application where I am acquiring data from a unit under test (USE). The PXI-7842R digitizes 3 groups of signals:

  1. an analog voltage monitor

  2. 5 digital signals connected to the analog inputs (limitation of the pinout of the connector) and converted into Boolean values

  3. 11 digital signals connected to the digital inputs

  That's a total of 1 analog and 16 digital inputs. I want to show them on the same graph, so I used a graph of mixed signals.

  To avoid reconfiguring the graph of mixed signals, everytime I open the app, I wrote a Subvi to programmatically format the chart. I pass a reference to the graphic indicator of mixed signals and try to adapt it to look how I want. The indicator has been designed as a cluster of analog waveform 1, 2 bus waveform Digital 5 signals 1 waveforms digital bus 3 and 3 different digital waveforms. The Subvi is called inside the host VI using a statement box controlled by the 'First Call' function. Then host vi bed a U32 to the target-to-Host DMA FIFO, formats the data in the correct order and the beams while an indicator of mixed signals. During an attempt to format the chart programmatically, I get errors in property not valid which seem to depend on State. Unfortunately, the documentation of the properties seems to be quite uneven for errors I get. The Subvi attached through the following sequence:

  1. configure the shared axis and shared properties (IgnoreAttributes, ShowBusseswithLines)

  2 set up the area of tracing analog scale Y (superior plot, area 0? documentation is inconsistent on this point)

  3 set up the area of tracing digital scale (sector 1) Y?

  4. name the digital bus (3 in total, should be numbered 0-2).

  5 name the plots

  Correctly all steps 1 through 3, but I get an error when you try to set the Active Bus to 0--> ' #1077 Error, invalid property (Bus Active)»

  I tried to set the Active plot area to 1 before setting the bus, and I get the same error.

  But then sometimes if I rerun the VI host without change, the Subvi ends correctly (even if the area of the scale becomes huge and empty). The only way I can remove the errors is to set the for loops to iterate 0 times, allow the host VI run a few cycles, stop the host VI, remove the constants 0 and run again. And then there is no property errors.

  I then tried to create a constant of mixed signals with the correct sequence of the empty slots and it allows to set the MixedGraph::Value property at the beginning of the Subvi. Now error #1077 occurs at the level of the active node before Plot Bus Active node. The thing first on the definition of the constants of iteration 0 does not help when the value property is an initial value.

  Here are my questions:

  1. the ActivePlotArea property must be configured to use ActivePlots or ActiveBusses, or is that only for sizing and moving areas of land?

  2 - is ActiveBus ActivePlot to define first of all necessary to property? for example, if I have ActivePlot = 0 (for analog plot), the ActiveBus property will always fail?

  3. what else is necessary for the property ActiveBus of function call?

  4. why the Subvi is failing the first time but succeed during subsequent calls without be initialized does not yet reach every time after you initialize (except for loops are set to 0 and Subvi finishes once)?

  5. because I show a legend of the plot, I don't want the names of digital signal appears again in the scale box Y. How can I hide the names but to allow the plot area to extend completely to the legend of the plot rather than leave a large area of wasted white space?

  Hi Nick,

  The reason your Subvi does not work, it's the bus you want to change do not exist when you run.

  If you want to run this sub - VI like initializer, you must first initialize all of the plots you will be change.

  I've included a small example of how to achieve this by grouping together a constant of analog waveform with some constants of digital waveforms and food nerd in the property "value" Mixed Signal curve.

  

• Mixed Signal graphic = > line of bad names

  Hello

  I want to use a graph of Mixed Signal and I noticed that the digital waveforms line names are not properly displayed.

  For example:

  The attributes of the wave the nams of line are defined as "Name1" "Name2"; "Name3"...

  On the graph of Mixed Signal, the first line is correctly called 'Name1' but all the others are called "Digital 1-> Line 0"; ' " Digital 2-> line 0 '...

  Is this a bug in LabView?

  If you use a normal digital chart, all names are displayed correctly.

  Yes, I know that I can change the linenames with a property node, but it should also work with the attributes of waveform.

  And a small second question: why are there no digital and mixed-signal graphics cards? I always build them manually...

  Best regards

  Reinhard

  Hello Reinhard,

  I think I found a link that might cover your problem. Looks like it has been known for some time

  How can I assign names to my digital waveform shown mixed graphic Signal?

  http://digital.NI.com/public.nsf/allkb/A6D74595D0EEFA6386257D77006537DE?OpenDocument

  Best regards

  Michael