Point me to the example make a pulse 6225 Board + daqmx

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• Keep the data on the record points and serve the rest

  Hello world!

  I think somehow either CompressWorkspace [tree] or PurgeTable what we want to do, but somehow I don't see exactly how...

  Here's our situation: the admin of our customer demand can create backup points. He made what is called "data freezing" happens a few times a year (3-4).

  The database is created using WO_OVERWRITE to keep a track full edit. However, for older data we now to just keep recording data and delete what that it is between the two. Only for the most recent backup points, we always want to keep the complete history. Is there a way to do this?

  To clarify things, with some text-Art, this might look like this for 5 Savepoints SP1... SP5:

  [SP1]-[SP2]-[SP3] hhh [SP4] [SP5] of hhh hhh [LATER]

  where - means "no historical data here" and "hhh" means "here for historical data.

  My first guess was the CompressWorkspace procedure, but if I give two points for first registration is deleted. What we want to do is give two points of record, have deleted all the data of the history between the two and keep both the backup points. In the example above, we would like to compress between SP1 and SP2 the SP2 and SP3.

  Note: the database will be migrated soon to 11 GR 2, so all the features of the OWM until this version can be used for a solution.

  Any help is appreciated!

  Kind regards

  Andreas

  Hi Andreas,

  You don't want to use CompressWorkspace.  Specify the backup even point to firstSP and secondSP and the parameter compress_view_wo_overwrite set to true.  Thus, for example:

  SQL > dbms_wm.compressworkspace exec ('LIVE', true, "SP1", "SP1");

  This should be done for each backup point where you want to delete the history.  The procedure would remove all lines for each primary key value, with the exception of the most recent in the backup point.  It cannot be done on a variety of checkpoints at the same time, as that would remove the previous save points, as you pointed out.

  Kind regards

  Ben

• Can we make several Off features in a collection of panels and how the query-off based on the example?

  Mr President.

  Can we make several Off features in a collection of panels and how the query-off based on the example?

  Concerning

  Once again, no jdev version?

  It must be really hard to remember ehich version you are working.

  Would have given a quick glance in the docs

  featuresOff

  java.util.Set

  Yes

  a list separated by spaces of the features by default to disable to the panelCollection. Values supported are

  That is the answer to a message.

  The second answer is that qbe is filtering tables. If you fund the table without filter you have not the qbe.

  Timo

• Improvement of the aquistion of ADC pulse time

  Hello

  I use Labview 8.6 Professional version and an ADC NI PXI-5114 in a chassis PXI-1033 to capture some positives.  The pulse widths are in the order of 100 ns to 10.  The impulses can reach CDA at random times.

  With the search here, I found some suggestions very useful and therefore following the examples of Labview OR-Scope my Foundation, I managed to set up a program that allows you to capture these impulses.  For now it works great except for one thing.  It will not capture consecutive pulses that are closer than 2ms.  It is too slow for my application, actually faster than I can be ready to seize the next pulse best.  If I can get this time back down to about 200 US, I'll be happy.  The ADC 5114 specifications indicate a time to rearm in the low microsecond range so I know the hardware is capable of doing much better that what I mean but this is translating to the software side of things gives me some difficulties.

  As much as I know there is no trigger to start and stop captures data on one edge, so in my program I capture of basic data on extraction into pieces and use a signal processing subVIs to pick up the trailing edge of the pulse in order to know when to stop capturing data.  If the pulse width has been set then this wouldn't be a problem, but as I don't know what it will be, I prefer to capture just the pulse so that I don't miss other legumes.

  Is it an inefficient way to solve the problem and what is perhaps originally the code is running slowly?

  I would appreciate any help with a solution to this time getting 'rearm' down (or comment on my code and that you feel would improve it).  I've been using Labview for a few years (only to learn as I go), but it's my first shot using NOR-Scope and a digitizer high speed.

  All suggestions are welcome!

  Thank you

  Daniel

  More importantly, if you want to rearm fast, deterministic, you must use multi-record acquisition.  This sets up the device automatically and very quickly (depending on the configuration and device, 1us to 10us), rearm.  As you apparently don't know how long the pulse can be at any point in time, you must set up the record for a reference position length small (say 10% for 10% pre, post 90% trigger) and samples sufficient to cover your expected worse (10us + 10% pre-trigger + a margin engineering for a pulse that is wider than expected).

  You can activate the multi-record acquisition by plugging in just in a number to Terminal "number of records" on the Horizontal VI to configure.  This will configure the digitizer to divide his memory embedded in N circular buffers to store individual records triggered.  It is the only mode that you can expect to get quick reset time on as host, recovery time, and duration of treatment are not the bottleneck.

  Once you do this, you will need to make a few small changes to the rest of your VI existing to control what (s) you are to pick up.  I suggest you look at the examples of Multirecord NOR-Scope.  If the flow is a concern, you probably want to fetch multiple records at a time.

• How to use NI9474 and cdaq9172 to generate the right variable cycle pulse 1 kHz

  Hello, I would like to use a NI9474 (in a cdaq9172 chassis) to send a square with a frequency of 1 kHz wave. The cycle will change just about every second (based on NI9205 voltage readings in all separate loop, by controlling the local variable 'duty'). It is important to have a temporal resolution of decent output; that is the difference between 50% and 51% of duty cycle must be determined. 9474 says that it has a speed of 1, so I expect that this is possible. This is used for a buck converter. The output is switching on and off a MOSFET, which only needs 5 volts, and less than a mA, when on. I tried a "simulate" with a square wave signal using a frequency of 1 kHz and 100kS/s and introduced in a DAQ assist with dynamic data to the converter Boolean between (probably not the best approach I admit). I tried also implemented using the DAQmx screw (without help). In both cases, I got an error that says that I need an external clock. I know that the chassis has an internal counter. This could be used for synchronization? I looked at examples of Pulse counter, but which seems to be to use a meter as output, not a digital channel, so I'm a little confused. The numeric examples do not seem to be what I want either. If I can't use the chassis for synchronization, it is possible, that I could get a NI9401. Could I use this counting or establishment of a clock (I could attach a function generator using a square wave of 1 Mhz for example)? For example with a 1 Mhz clock, then for a 50% duty cycle signal 1 kHz, after 500 clocks range from low to high and high to low after the other 500, (or 510 and 490 in 51% duty). Is something like that possible? Thanks for any advice, Thomas I should confess do not understand the things of meter too well at this point. Many of the examples I've seen, are apparently complicated screws.

  Hi Thomas,

  You can certainly do with a counter pulse train generation by using your 9474 in a cDAQ-9172 chassis.  Make sure that the module is in the slot 5 or 6 (latest chassis do not have this restriction).  Examples of pulse train located in the finder example under entry and exit-> DAQmx hardware-> generating digital impulses.  The example of Gen dig Pulse Train - Continuous.vi is probably in the neighborhood of what you want.

  To update the market on the fly factor, write the Co.Pulse.DutyCyc channel property after the task starts.

• "An insufficient number of calibration points function" in the calibration to learn?

  I suspect that IMAQ learning model calibration VI can be tapped, like I can't make it work for the few reference points.

  I get error-1074396116, even when I'm passing over 4 points of reference, as specified using.

  I noticed these posts, the http://forums.ni.com/ni/board/message?board.id=200&requireLogin=False&thread.id=10257, the http://forums.ni.com/ni/board/message?board.id=200&message.id=17400&requireLogin=False, where the problem seems solved. The VI of the sample provided by the first poster, http://forums.ni.com/ni/attachments/ni/200/10279/1/Reference_Points1.vi, does not work for me either.

  My setup is LV9 on winXp32, image of 640 x 480 8-bit grayscale. What I try to do is not the subject of the post, the potential bug is.

  Can anyone provide a working example? Calibration samples included in the finder of the example use calibration grids, not of few reference points AFAIU.

  Thanks in advance, Enrico

  After a little experimentation with the VI provided by the first poster (attached my small change), I realize account of the calibration point of view seem to need a minimum of 5 points, while non-linear required a minimum of 9. So, there is a bug in the documentation. This can be confirmed?

  Thank you, Enrico

• Why I see a yellow exclamation point symbol in the address bar?

  When visiting certain sites using Firefox Android, I get a yellow exclamation symbol in the left side of the address bar. For example in http://www.w3schools.com/html/html5_geolocation.asp
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• Points square on the screen, but it doesn't seem to be a GPU failure

  Hello. When El Capitan (last) tried to wake up from its sleep it won't but I used the power button to wake him up, when he made these points there. The system froze. I hard rebooted the screen is split in two. I hard rebooted again, they were left, so I did the LANDAU and SMC restores the points place after a while came back (sometimes lines, sometimes the screen would split screen). I removed the adaptor for the second monitor. After doing all this when I started out on a disc USB external (Snow Leopard), the points appeared again a few minutes.

  I did a lot of tests and everything past that. All on their default test setting: on Windows 10: Prime95, GPUtest, sky, Speedfan for the hard drive. On OS x: AHT (the one by which you press D, which has been tested 3 times), Cinebench and disc utilities. Usually when the CPU or GPU, within minutes the points and the screen becomes scrambled in minutes, but there seems to be nothing wrong with the material (late 2009 iMac, make / batch of March 2010). On Windows, Boot Camp 10, everything was fine, no square points.

  This could be a software problem (corrupt kernel I read on some forums could lead the points). Now it has been hours after I did the test and resets, it's normal.

  

  Extensive tests show that the material is good:

  

  Thank you in advance. God bless you. Revelation 21:4

  Start in Safe Mode, Mac OS x: Safe Mode bootand see if you get the same problem there. If she does not repeat is to log on to another user on Mac account and check there.

  However, it looks like a GPU card failure.

  

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  http://www.Google.com/Firefox
  
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• The mouse pointer passes over the Satellite L10

  I have a toshiba satellite mobile celeron 1.5, 512 MB ram, 40 GB HDD, dvd - rw, wireless, modem, lan.
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  Hello

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  I checked some of the messages in this forum, and generally this should help.

• How to generate a working executable from the example of writer DataSocket VI file

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  Has anyone successfully built an executable using DataSocket?  If so, can you offer any advice?  I'm using LabVIEW 2011.

  Thank you, Mark

  Thanks Nathan.  I was able to create and deploy an executable with DataSocket.  The last obstacle was to "uncheck the option"Code is compiled separately from the source file"in the properties of the VI" for the "DataSocket Server Control.vi.  The only problem with this solution is that I now have a custom DataSocket library.  I think that a solution would be to copy as VI or library in my project folder so that the solution is transferable to others in the future.  I would like to hear how other developers LabVIEW with custom libraries, either by strictly avoid that, keeping their own copies, or another solution.  But this is probably a topic for a new thread.

• DAQmx: synchronization of the two tasks of pulse output

  Hey Gang,

  I need to synchronize two tasks of pulse output.  I use the PCI-6601 Counter-Timer.  I need to use two tasks because the second output frequency must be a multiple of the first.  I think that the way to do it is using arm Start Trigger functionality.  I found some information on this site about it, but the examples spoke using a "dummy" analog task, I do not understand.  I have found no documentation on the trigger to begin arms in the DAQmx documentation.

  For reference, here's the enforceable part of my code:

  TaskHandle DetHandle, LasHandle;

  DAQmxCreateTask ("DetPulses", & DetHandle);
  DAQmxCreateTask ("LasPulses", & LasHandle);

  DAQmxCreateCOPulseChanFreq (DetHandle, DetChannel,
  "DetChan", DAQmx_Val_Hz, DAQmx_Val_Low, 0,0,.
  StateSettings.DetFreq, StateSettings.DetDuty);
  DAQmxCreateCOPulseChanFreq (LasHandle, LasChannel,
  "LasChan", DAQmx_Val_Hz, DAQmx_Val_Low, StateSettings.Delay,
  StateSettings.LasFreq, StateSettings.LasDuty);
  DAQmxCfgImplicitTiming (DetHandle, DAQmx_Val_FiniteSamps,
  StateSettings.DetPulses);
  DAQmxCfgImplicitTiming (LasHandle, DAQmx_Val_FiniteSamps,
  StateSettings.LasPulses);

  DAQmxStartTask (DetHandle);
  DAQmxStartTask (LasHandle);

  DAQmxWaitUntilTaskDone (DetHandle, 10.00);
  DAQmxWaitUntilTaskDone (LasHandle, 10.00);

  DAQmxStopTask (DetHandle);

  DAQmxStopTask (LasHandle);

  DAQmxClearTask (DetHandle);

  DAQmxClearTask (LasHandle);

  I think I need to insert the startup code of arms before the start of the tasks, but I do not know what device to use for the relaxation of the beginning.

  I'll appreciate any help.

  Thank you!

  Roger

  Hey Jorge and all,.

  I appreciate the effort you do in my name.  The simplistic answer proved to be using the correct syntax to specify the name of the terminal where the starting arm trigger specification may find the edge of digital triggering.

  I use an output digital as the trigger (not shown in the code segment):

  >>>>

  Adjust the arm trigger for meter market
  DAQmxErrChk (DAQmxSetArmStartTrigType (DetHandle, DAQmx_Val_DigEdge));
  DAQmxErrChk (DAQmxSetDigEdgeArmStartTrigSrc (DetHandle, TrgTerm));
  DAQmxErrChk (DAQmxSetArmStartTrigType (LasHandle, DAQmx_Val_DigEdge));
  DAQmxErrChk (DAQmxSetDigEdgeArmStartTrigSrc (LasHandle, TrgTerm));

  The "TrgTerm" variable contains an array of char as "/ Dev1/PFI0" "EUREKA" discovery is that requires an oblique protagonist to work.  In other functions DAQmx I used that was not necessary.

  All of this consternation was absence of a single character ' / '.  It would be nice to add this to the DAQmx database somewhere.

  Best regards

  Roger

• DAQmx continually update the example output table

  Hello

  I use the example Synch_AI-AO in the DAQmx folder and it works very well for sine waves, pulse, triangle waves, or whatever it is periodic. However, I would like to output an array of noise which produced WhiteNoise, which is continually updated service every N seconds.

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  Is there a way update output so that it does not have the question of the recurrence which blocks my program?

  Thank you.

  Hi EricJR,

  Instead of calling the functions StopCallback and StartCallback, have you tried to call the DAQmxWriteAnalogF64 function whenever new samples are generated?

• Do the same function as the example of menus to cut short except with ring menu...

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  Thank you

  Steve

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• How can I score points defined by the user in amplitude / frequency diagram?

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  The points defined by the user might just be another plot.  You can add annotations to a conspiracy, but it's a lot of work.