Then the iterations of the loop

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• Then the loop or VI runs more slowly, and then demanded

  Hello LabVIEWists,

  I developed a small VI for the monitoring and recording of data. Unfortunately, the while loop, I use to ask for samples of each iteration is not execture as fast I asked by placing a hold until the next ms VI. Even if I change the time of 100 ms to 10 ms, execution speed does not change.

  Anyone has any idea why?

  

  File IO is generally slow.  One thing you could do to speed to the top of your loop is to move the screw of file spreadsheet reading out of the loop and use autoindexing to iterate through your columns.  You should probably use Transpose table 2D to the index on the size you want.  Also, you loop must be a loop FOR.

• then the loops end early when there is a table of cluster for several xyplot

  Hi all

  I want to order a motor (for the rotation stage), a Keithley 2450 and SR830, changing the level of step by step while measuring the VAC and Vdc continuously with changing Idc. Half size loop partially shown in the picture below is to change the degree by the stepper motor. The structure of sequence and two small inner loops is to measure the Vac-Idc-Vdc.

  What I want to do is to show the plot xy in real time during the measurement and show the multiple xyplots for different degrees (a line unique xy for a degree). So I add the disabled part and the problem comes.

  When I turn off the game and everything works fine. All Vac and Idc values measured with the vice-president Vdc range (such as-10 V ~ 10V). But when I activate the part, the two loops stops at halfway.

  I wire errorout writing on an emloie file the register shift for errorin the out more while loop, which does not work.

  I'm confused totoally. Can someone help me?

  Thank you.

  Zhu

  

  I see a major problem.  It is a classic example of all of the data being processed in the loop of consumption due to the lines of OR.

  If you have a loop, adding data to a queue.  You have a second loop by deleting the data.  The producer loop completes and destroys the queue.  This causes the loop of consumer to raise an error due to the line being destroyed and stop.  But what happens to all of the data still in the queue when it is destroyed?  Answer: it's GONE.  It will not be processed.

  Since you want that each piece of data, you can send an order any to the loop of consumer to let him know he turned and then allow it to stop.  Only after stop the loop of the consumer the queue must be destroyed.

  So should what command you use?  In this situation, I would send an empty array when the loop of producer ceased.  The consumer checks only data read to see if it is an empty array.  If this is the case, she stops the loop and destroys the queue.

• Envy of HP Touchsmart m6 Sleekboo: HP Envy tm m6 Sleekbook turns on, shows the HP logo and turns off. Then the loops.

  I turn on my laptop one day to find that it shows the hp logo, screen goes black, then goes off completely and becomes back only to repeat the process. I have a video I have uploaded to my YouTube channel if someone is confused with my problem. Help, please. My channel is StarliAA.

  I took my laptop to a repair shop and the problem is that the battery is defective.

• Then as the loop timer Timing vannes_ouvertes. Elements

  I would like this while loop to iterate through every second. But it seems that he doesen't recognize the loop timer. What's wrong?

  

  Just found the article to help talking about it: Debugging of FPGA screws using Mode Simulation (FPGA Module)

  At the bottom, it says:

  Understanding simulated time on the host computer

  If you use some FPGA resources and you run the FPGA VI in simulated using I/O simulation mode, the resource uses simulated time rather than real time. Simulated time could be faster than real time according to the number of events that occur during the simulation. For example, if you add a waiting VI (simulated time) for the schema and set the timeout to 1000 ms, LabVIEW does not attempt to delay a second of real time. Instead, LabVIEW delays as long as necessary before performing the next action scheduled in the simulation.

  The following resources are using the simulated time on the host:

  • Then the loops
  
  
  • Single-Cycle timed loops
  
  
  • VI of waiting (simulated time)
  
  
  • Loop timer Express VI
  
  
  • Number of cycles Express VI
  
  
  • FIFO, except DMA FIFO
  
  
  • Wait on Occurrence with Timeout based on ticks
  
  
  • Interrupt the VI, during her wait until this that clear is TRUE

• While the loop records all the data

  Hello

  I have a LabView program containing two while loops. The first is used to increment a frequency on our machine and the second, which is located in the first, used to take a certain number of points of data to this frequency. After taking these data points, the frequency is supposed to rise again. This happens for a set number of times.

  The problem I have is that the data file as the data points in the second then the loop are supposed to be written in does not display do not all the data points in the program should have taken. For example, if we want the first loop increment of 10 times and the second to take 5 data points every time, we expect to see 50 data points in our files. But we see only 10. The watch file always only an amount of data points equal to the first loop iterations. If we cut our data at that time.

  Someone has an idea what could be our problem?

  
  

• repeating nodes using loop but when XML string concating then concating only last iteration of the loop FOr?

  		I stuck with a problem that I use FOR loop to generate expandable nodes. Now when I concat the node generated in the primary node and then I only last iteration of the loop FOR. can someone suggest me a way to manage this error... BECAUSE me IN 1.pl_phone_tab. County LOOP SELECT xmlelement ("phone" , xmlelement ("PHONETYPE", xmlattributes ('01' AS "dmnADRP_PHONETYPE"), pl_phone_tab (i) .p_phtype_tab) , xmlelement ("PHONENUM", pl_phone_tab (i) .p_phnum_tab) , xmlelement ("PRIMARY_CONTACT", pl_phone_tab (i) .p_prcon_tab) ) IN p_phone_xml DOUBLE; END LOOP; SELECT xmlelement ("PhoneInfo" xmlconcat (p_phone_xml)) IN p_phone_info_xml DOUBLE; Here, I'm a single node, but there must be two nodes for node of PHONE

• How can I get my Teststand report to display only the data of the latest iteration of a loop DoWhile ONLY stage?

  Good so I a DoWhile loop with a numeric value to test.  The loop will run 10 times.  I want only the status of success/failure of the test of the numerical value of the last iteration of the loop is displayed in the report.  I don't like on the other iterations.  Help, please!  Thanks in advance I think that this can be accomplished with the recall of ModifyReportEntry and fancy logic...

  Thanks for your comments everyone.  I ended up changing the reportgen_txt.seq to identify during my test was in a loop (by setting an additional result in the different stages of my comment loop-step to say "Record last loop.".)  Once this indicator lies in the ResultList I turn to reportgen_txt, I have to loop through all the ResultList entries and if the current entry has the same name and the "record last of loop." as a previous entry, I delete the previous entry and store the current.  All this way, I have to do is to set a flag in my test sequence, and if when debugging, I want to see all the data for all the iterations, I just remove the flag.

  The reportgen_txt.seq include:

  C:\Program NIUninstaller Instruments\TestStand 2010\Components\Models\TestStandModels

  I'm not worried about the time constants on my generation of report and I am not limited to stress strict memory so this seemed like the best way for me to do what I had accomplished.  I'm sure there are better ways, but it seemed simpler than the generation of report definition to be disabled and then enabled...

• Sort of the length of the sample segment longer that the iterations of the loop w/o shift registers?

  Hi all

  My loop runs about every s 0.06 and now I was prompted to add to program a function that will enjoy the latest 3 data and return the max/min value for two of the signals.  I can imagine a clumsy way by program to do this with SHIFT registers - take the max/min for each iteration, save-repeat-compare until you have enough iterations to fill 3 s of time.  But I can't help thinking there must be a cleaner way (better?) to do.

  Any help?

  Thank you

  Hello

  Try looking in a circular buffer.

  http://zone.NI.com/DevZone/CDA/tut/p/ID/7188

  Once you have determined how many times you put entries in the buffer, you will know exactly what is the size of a table to enter and do the Min/Max on.

  Another option is to use a circular table.

  http://decibel.NI.com/content/docs/doc-3414

  I would be created to operate somewhat like a Global functional or motor of the Action.   The Subvi would then be used in your loop DAQ for new data "stack."   Then called in another loop or part of your code to read every three seconds.

• output to the loop iteration

  Hi people!

  I am trying to use a very simple "loop For" with "16" iterations and Shift Registers starting at '0' and adding '4' on each iteration.

  But I am not successful to display each value in the iteration. Only the final value of '64 "!

  Is it possible to generate the value of each iteration in each loop?

  If this is the case, then could you give an example?

  See you soon!

  
  

• The rehabilitation of the iterations of the loop to 0

  I need help resetting my iterations of the loop back to 0.  Most of the time it works very well but has a bug.  Some background on what I'm trying to do.  Basically, I'm ordering a motor with a brake on the subject.  On the brake, there is a manual replacement option that I follow with a proximity sensor.  If the magnetic field is broken, it will stop the VI with the iteration, that he stopped.  When I press the Start button, the iteration continues. The VI stops when equal iterations # Set value witness of Cycles.  I tried the reset of the iteration option to 0 if I wanted at any time, so I put a reset button in the VI.  It works very well with the one bug. This bug is that if for some reason, the number of iterations is higher than the Set # the number of Cycles, the VI will continue to operate.  This is where I need help, because I don't know how to go about it other that pretend by setting the threshold min by a large number, forcing the operator to reset the counter.  Is attached to a peg of the area of the code.  Any help or suggestions are greatly appreciated.  Thank you!

  swins wrote:

  The LabView run VI put the button in a State of "rest" and does not run until I press the Start button.  Thanks for the reply.

  Many people write their programs as they come out of the main loop when the program is finished. Then they on the LabVIEW run button to run the application again. Worse still, they have no main loop and push the button of continuous running. Both are wrong and the latter much more.

  Sorry, I assumed you were doing that, but without seeing more code, I could only guess.

  Changing the equals or is more than one stage of debugging. What is the loop that you want continue to run or just the rest of your application? If the loop continues to run then the output of the speaker or is always false, which means that the output of equal to is never true.

  You put sensors on the exit of the tunnel connected to the Terminal to stop loop and register iterations to offset? Also to put sensors on the three terminals of equal to and activate execution of climax.

• Graph waveform repeats with each iteration of the loop

  Hi guys,.

  I got some great responses from you many already, so I hope you can help me once more!

  I try now to simply take a voltage that is measured by a sensor, I tied to AI1, and I built a graph of very simple waveform using a DAQ assistant. I have the setup terminal to CSR, the acquisition value continuous sample mode and read samples and rate game to a control on the Panel before which I can control myself. All this is a while loop that is needed to collect data over time.

  However, the problem I have is that for each loop of the loop, it seems, to reset the graph, so my x-axis never increases over time, ideally I want it to do is to show results through from 0 to 100 on the x-axis to say, and then, when it comes to 101, he will start again on the extreme left of the graphic to the right to a crossing another 100 points given) (there's a term for this, but I forgot, sorry!). To be honest, this kind of logic like everything in the loop will be restarted, but after trying to chart the loop it does not work, so I'm fresh out of ideas.

  I think I might have to do is to manually build segments of data acquisition (DAQ mx) and have only certain parts of them in the loop, although I can't be sure. I tried various examples and online on the database of NOR (including tension-int acq & graphic clk which works well in the examples, but not at my request) but no luck for now

  If anyone can think of what could be the problem, then please let me know. FYI the sensor is optical fiber if it makes a difference. I have attached the file VI that I did does not really...

  See you soon!

  Ritchie

  Since you use a chart there is no way to fix it. If you choose to go to a XY chart you could solve this problem. See the example below.

  

• A generated within a loop in a subvi output data can be transferred to the main program for each iteration of the loop?

  Hi LV users,.

  I have a very basic question, I have not succeeded to asnwer using basic considerations.

  I made a sub - vi that performs a scan of current-voltage using a unit of measurement-source Keithley and a loop FOR.

  The subvi outputs 2 tables with my data (essentially an array of voltage and the corresponding current table). I also defined a Terminal at the exit of a group of these 2 tables in order to plot a graph XY - output. Specifically, I indexed this cluster to update after each iteration of the loop FOR, in my sub - vi (the indicator is placed outside the loop, of course).

  My problem is that I want my main program to display the XY-graph in real time, with an update after each iteration of the loop FOR which is in my sub - vi.

  I have a problem because my sub - vi output terminals are available for the main program concluded as soon as the sub - vi has completed its own execution (which is what we expect of sub - vi to do).

  How can I use a sub - vi (because it's handy) and get in the main program in the course of its performance data that are generated from the loops of sub - vi?

  Thanks in advance for your help,

  Yoyo87

  Elements of the queue in the Subvi them put your main VI where you want to display the data and the.

  It is similar to the architecture of producer/consumer. There are examples of it in LabVIEW. The examples work with 2 parallel loops, in your case a loop (the producer) will be in the Subvi.

• Cannot read every value of the loop iteration for

  Hiiii...

  I developed a front-end which reads the values of serial port and display on the front panel.

  16 channels, which is a string data value. I've separated this string to read the data of each channel, but at the end of the loop for, I can read data only one channel for an iteration, and also I have to store each value iteration in a text file.

  I'm new to labview. Help, please. I have LabVIEW 8.0.

  Attached is my application code.

  This seems quite inefficient. Why don't you use a business structure? Why don't post it your code.

  In regards to the original code, you try to run by using the run continuously? I ask because I do not see a global loop, so it was not clear whether this was intended to present itself as a simple Subvi or "on-demand". If it's supposed to run continuously until you stop, DO NOT USE CONTINUOUSLY RUN it BUTTON. Use a while loop in your VI. Do not forget to place the initialization and close outside of the loop - you don't need to initialize and close the serial port whenever you loop around.

• compariing of data between iterations of the loop

  I am data acquisition of temperature with a Thermocouple NI 9213 drive and DAQ Assistant in a while loop.  I need to compare the temperature of a channel in an iteration of the loop with the temperature of the same string in the previous iteration.  The data collected in each iteration are delivered to a chart and a data storage file.  I know how to get the temperature from the data table in the current iteration, but don't know how to get the temperature of the previous iteration, except perhaps by reading the entire file in a table, determining the size of the table and query the last entries. This seems a bit ridiculous for each iteration of the loop and perhaps even embarrassing.   Any suggestions?

  Put the data in a record time difference. The left terminal of the shift register will have the data of the previous iteration.

  Lynn

• How to read the data processed on frm loop on each iteration of the loop?

  Hello...

  I need to display numbers as 1, 2, 3... constantly using the loop on each iteration (IE out of the loop using threads). I generated the numbers 1 2 3... using the back power node... I can read the final value after the last iteration of the loop for.

  I connected an indicator of the loop for. This indicator displays the value as a 4 If the number of loops that 4. I couldn't view 1 2 3 4 an indicator of items at each iteration.

  I'm in a position to read the value of the variable on each iteration of the loop. Please help me fromthis regard...

  Thanks in advance...

  In fact, I'm programming for multiplication of two table 2D.

  I need to select the particular code to perform this action using the structure of the case. who is right for which I need to give the value select 1,2,3 to a case selector, so I finish the task. you got my point?

  Thanks for the reply