trigger control

Similar Questions

• Add trigger control in the continuous sound example entry vi

  Hello

  I'm new to Labview programming.

  I'm trying to add the trigger control to sound Labview\example\continous of vi entry but I found that the program will hault or no. signal to display on the chart. Can anyone has any sample program or what is the problem on my vi?

  Try this one... I think that's what you were trying to do. I already test it and its work.

• Trigger control segmented after creation complete

  I have a list that contains the values to data controlled by a segmented control (Master or buy)

  SegmentedControl {
                      id: tsgListControl
                      objectName: "tsgListControl"
                      enabled: false
                      options: [
                          Option {
                              id: masterOption
                              text: qsTr("Master List")
                              description: qsTr("Complete item list")
                              onSelectedChanged: {
                                  getList();
                              }
                          },
                          Option {
                              id: buyOption
  
                              text: qsTr("Buy List")
                              description: qsTr("Items selected to buy")
                              onSelectedChanged: {
                                  getList();
                              }
                          }
                      ]
                  }
  

  It is on the first Page and the control is raised when the application is created.

  When this happens, I get an error that there is no function 'getList() '.

  Once the page has been created, switch between lists works very well.

  I tried to add the Page after the main Navigation Page has been created in the call onCreationComplete, but that didn't work either (actually caused it to other issues).

  Any suggestions to keep control of the trigger until the app is ready?

  The solution was to call the population to the list of the main c ++ after that was.

  if (!qml->hasErrors()) {
          AbstractPane *appPane = qml->createRootObject();
          if (appPane) {
              Application::instance()->setScene(appPane);
          }
  
          getListItems(getMasterListID(), "name", true);
      }
  

  Also, I made sure that control has existed on the ListView population, so that he could get an error from the initial call, when controls are added to the QML page.

  ListView* tlvMasterList = Application::instance()->findChild("lvMasterList");
      if(tlvMasterList) {
          tlvMasterList->setDataModel(returnGDM);
      }
  

• entry of the FPGA 9402 trigger cRIO 9064 on DIO does not read

  Hello

  I have a cRIO 9064 using the Module C 9402 as a quick DIO in a SCTL. I use it in a (GPDD) digital delay pulse generator.

  I've successfully the GPDD, triggered by a square wave generated internal, clocked at 1 MHz.

  and I measure the pulse output perfect on an oscillascope.

  My implementation is actually a clone of in: http://www.ni.com/example/31131/en/

  However, when I try to trigger from an external 1 MHz, 6 Volt amplitude; duty_cycle 50%, square entering the DIO3 wave

  There is no trigger, as seen on the Ticks_Between_Trig - which should be around 40, when it is correct release.

  I used the method "Check status" to make sure that the 9402 is ready before the SCTL.

  (Note: although it is labled Mod3 in the screenshot, it is actaully Mod1 and it simple namign incompatibility - which, once set doesn't change anything.)

  I see not all digital HIGH when the input trigger control, what I do when you use the internal trigger.

  The LED flashes, quite often even if actually at 1 MHz.

  My question is what thing I must have the DIO 9402 read the input signal.

  I followed the instructions here:

  http://zone.NI.com/reference/en-XX/help/370984R-01/criodevicehelp/cRIO-9402/

  but maybe I missed something.

  Thank you

  Michael

  Resolved,

  I had a bad input pulse generator which was flacky.

  When I check the amplitude of the pulses on an oscilascope but a day later, when I corrected my code to include the ready method of Module C.

  the amplitude of impulse was not working, but I've always tried to test with her.

  Finally I double checked on the oscillascope again the trigger signal to find not suffecient.

  Old eqiupment... then the warm-up does not.

  Michael

• Error 50103 - simultaneous analog Vout and wine with start of analog triggering

  Hello

  I'm stuck error 50103.  I looked on the Web site of NOR and worked through the 7 cases and think that my problem is the 6 case - although I'm not sure - and have no idea how to fix this. Basically, what I would do is out my signal and have receive side save after it passes through a noisy channel. To start, I have attached a trigger control so that the transmission or recording start before the input trigger exceeds a certain value (in my case, 3V).

  Could someone please look at my code (attached, called 'Optical_DPPM_V3.vi')) and try to give me an indication as to what I'm doing wrong? Thank you!

  Furthermore, I use examples of OR that I have also included in the .zip for reference file.

  SP

  P.S. hardware: LabView 8.2, NI PCI-6070E

  Hi gt3000,.

  Thanks for your reply. I actually solved the problem I called one of your offices directly and spoke with someone last night.

  Indeed, the problem was "case 6" as it is stated on the page you gave. "." When I spole with one of your colleagues, I was directed to an example that does most of what I wanted. If anyone is interested, you can follow this path to find:

  Help--> find examples--> material input and output--> DAQmx--> synchronization--> multifunction--> multi-function Synch AI - AO.vi

  It seems that the trick is to use an internal digital triggering to synchronize the CLK for VI and VO.

  If people are interested, I can send my final code around for a differential pulse modulator, triggered by an external analog voltage which the receiver registers and stores the values in a worksheet. My next goal is actually write the code for the receiver to demodulate information... here go us!

  Thanks again,

  SP

• FPGA AO channels are often damage

  Dear all,

  I m facing a problem in my card series FPGA 7833R (with PXI controller 8108 RT, 6229 PXI, PXI-6514 in chassis PXI-1042), in the FPGA AO channels is damage frequently, here I m using FPGA to order Festo 2 taps using PID and one of 6514 card are physically connected to DI in FPGA to start/trigger control PID. I m using parallel loops in FPGA to control 2 valves of festo. Loop1 with AO0 will controll Festo valve 1 and 2 with AO2 loop control festo valve 2 and both channels are harmful, what could be the cause of damage. Kindly help me findout the problem.

  With respect,

  Vipin

  The most likely cause is back emf of the coil of the valve.

  Have a look here http://www.progeny.co.uk/Back-EMF-Suppression.aspx

  This can help you

  Good luck

• Use an encoder to establish and sampling in discrete time

  I can't really control what DAQmx subs to use and how to configure. It should be a simple task, but not for a beginner like me. WARNING: I spent hours reading the help files, knowledge base articles and research forum and there is nothing in them that makes sense to me. Details of the operation are in the diag of block. Please take a look and see if you can guide me. THX.

  BTW... Using panels of MAX test I checked the wiring, operation and configuration of my sensors. With the attached vi, pgm does not signal departure but initiated each time the first 'A' pulse arrives. This checked because the encoder can measure data without ever passing the pulse "Z".

  Thanks Mike. I got this example and it is one that I had already downloaded. It does not work. After the start pulse, it reads all the samples in the sample clock frequency, not on the edges of the reference trigger pulses. The example is wrong. So I did what I normally use in these cases... wandering banging my head against the wall until something gives.

  Solution. Set the example of wiring in the source of reference trigger control in the source of the input clock as well as in the relaxation of reference under vi (this thread already exists). He now works as it is supposed to. Hard learning of examples when the examples are wrong. Here is the solution where all els tries to emulate this example.

• Shared speed variable notification - separation of GUI

  Hello

  I am developing a LabView application that relies heavily on shared variables to separate the logic of basic software graphic user interface. Some variables are used as triggers, which means they are Boolean values that are controlled by the side Server (core application) for the 'true '. If located, they are reset to false and some actions are executed (as queue a message to a queue internal).

  The attached picture shows a situation where the Boolean trigger control is carried out in a loop. Now, what I've found, is that the same message gets queued several times. The OAS 'Save thermal Calibration' is read in the loop, to false and read in the next iteration of the loop. But apparently, the OAS server is too slow to notify the accessor on the value changed before the next iteration of the loop.

  I met similar behavior on some other posts in the code and until now solved by adding a 'Wait (ms)' for about 200 m, but this feels pretty ugly and I wonder if it could break if at some point the load on the app and the SV server becomes even slower.

  Also, I wonder if there is a way to speed up communication server SV, especially when writing values and inform other accessors of OAS on the changes.

  Published static Variables in the network are slow.  There is no real way around it.  And, Yes, when you enter a value, this value is really in the variable until the NSV Server manages it.  And when the value actually gets sent to the server can be on the order of 100 ms.

  If you talk to another computer, I recommend that you change using a network flow or TCP/IP.  This way you have actual messages, ordering the server what to do.

• Organize the firing order?

  I had a problem in a compostion slideshow widget and could not sort, so I ended up a target to remove it completely. Unfortunately, the target was my home/landing page and the new trigger is now at the end of the beach. Now, I try to copy/paste a very large amount of content to get my pages reorganized, unless there is far from back my trigger control. Please tell me that there is a way...

  (1) save a copy of your .muse file (if you have it back if it doesn't work the first time).

  2) click on the plus sign to add another container of trigger / target pair of container for the widget of composition.

  (3) select the newly added trigger is active.

  (4) on the UI on object, change the Position of dispersed, if it is not already scattered (this will be temporary)

  (5) select the newly added target container.

  (6) use the menu of the object in the "background".

  (7) select the newly added trigger container.

  (8) use the menu of the object in the "background".

  (9) in the UI on object redefine the Position on whatever it is.

  This workaround is taking advantage of a bug where using place forward / put an end to the rear for the trigger or target containers will be re - order auto-play. It's a bug because the rankings for automatic playback should not be modified by the order of the elements and worse still if you change the order of a trigger and not the corresponding target then triggers and targets in the widget of all the compositions are going to then be incompatible.

  Once you go through the steps above, check that automatic reading order is what you want and also make sure that each triggers takes you to the correct associated target. If she does not return to the backup saved to your .muse file and try again.

• How can I trigger a Boolean control from a Boolean indicator?

  Hello

  I want to trigger a Boolean control (like a button) to a true value as soon as my indicator (LED) Boolean Gets a value of true.

  Can someone tell me how to do this?

  You can use either a local variable or a value of property node to define a control value.

  Right-click on the control and create/Local Variable or Create/property/value of the node. Change the property node or a variable to write mode by right clicking on it and selecting "modify to write." Local variables can default to write (do not remember) but I know that failure of nodes of property for the playback mode.

  I prefer the nodes property simply because they have a mistake in and out, so I can control the flow.

  [Edit:] Remember that you must pass instead of locking for the mechanical action. If you need a locking Boolean control and need programmatically set its value, then you need to reset the State after reading using either a local node or property.

• Use a control for a column nvl non-zero trigger

  Hi gurus,

  Appreciate your help here,

  I was told to use a control nvl for a column not null, am looking at here can we use NVL fucntion for a (ES_NUMBER) column not null or something wrong...

  Please notify.

  
  Sea of ESCR

  ES_NUMBER not null VARCHAR2 (16).

  ID NUMBER (8).

  FULL_FALG VARCHAR2 (1)

  sample data:

  ES_NUMBER	full_flag	ID
  67156044950	THERE	1
  484002064992	N	6
  22220000	N	3
  601101704712148	N	4
  670162973	THERE	5
  670163740	THERE	6
  670163740	THERE	6
  670170399	THERE	6

  
  CREATE OR REPLACE TRIGGER prod.merpiggytrig

  BEFORE INSERT OR UPDATE ON PROD. SEA
  FOR EACH LINE

  DECLARE
  bParam BOOLEAN: = FALSE;

  BEGIN

  IF THE INSERTION
  THEN
  bParam: = TRUE;
  ELSIF UPDATE
  THEN
  IF NVL(:NEW.ES_NUMBER,' ') <>nvl (: OLD.ES_NUMBER,' ')
  
  THEN
  bParam: = TRUE;
  ON THE OTHER
  IF NVL (: OLD.ES_NUMBER,' ') <>: NEW.ES_NUMBER,' ')
  THEN
  IF (: NEW.ID = 6 AND)
  NVL(:OLD.) FULL_FLAG, 'n') <>nvl(:NEW.) FULL_FLAG, 'N') AND NVL(:NEW.) (FULL_FLAG, 'n') <>'n') THEN
  bParam: = FALSE;
  ON THE OTHER
  bParam: = TRUE;
  END IF;
  END IF;
  
  END IF;
  END IF;
  
  IF bParam

  THEN
  UPDATE prod.ter SET piggy_flag = 'Y '.
  WHERE mer_id =: new.mer_id
  and NVL(piggy_flag,'N') = 'n';
  END IF;

  < < TRIGGER_EXIT > >
  NULL;

  END;
  /

  Hello

  978485 wrote:

  Yes es_number non-null VARCHAR2 (16).

  In fact, a question that we can use nvl for not null column.

  Yes. Was there no problem when you tried?

  The only restriction on NVL is that both arguments must be the same data type (or close).  There is no restriction on arguments is NULL or not.  Neither the argument must be NULL.

• Is it OK to trigger 2 loops of event out of the same control?

  I have two circuits of event that will trigger when the user click on the Exit button. Is this ok to trigger the two loops off the coast of the same order? It works fine, but I don't know if there could be a problem. Please see below. Thank you!

  sfrosty wrote:

  Perhaps another point I have wired 50ms to the timer of the event MENU structure and want any delay in the structure of the MAIN Event. Not sure if it is a valid argument.

  Why?  You do something else in this loop?

  I recommend spending your menu commands in your main event loop.  You'll thank yourself later.

• How to control several input channels analog daqmx for data acquisition trigger (all on the same SMU-6368)

  Using the SMU-6368 module, I would like to monitor the analog signal on multiple channels and trigger on several channels - relaxation and acquisition channels is all on the same device. Probably going to be sampling at 200 kHz and more. FM LV 2009 2012, with SV toolkit in Windows 7.

  If SW trigger is the only way to follow, there example code shows how to manage the block size, etc.. ?

  jkessler,

  Yes, the example was in 2012.  I didn't get what you asked for in your first post because I didn't know you wanted to ANY channel to trigger acquisition of all channels.  It is not possible at the hardware level, because you cannot specify four channels as the command source. This will be implemented in the software.  I recommend the reading of all four channels and neglecting data until you determine that one of the channels reached your threshold value.

  Kind regards

• Controls that trigger cases of timeout event structure

  In a structure of the event, we can understand the controls in the event of timeout. But if we do it this way, we do not get event data node associated with the controls. I don't know if it is a good practice and whether there are issues listed. Please comment. Thank you.

  guangdew1 wrote:

  In a structure of the event, we can understand the controls in the event of timeout. But if we do it this way, we do not get event data node associated with the controls. I don't know if it is a good practice and whether there are issues listed. Please comment. Thank you.

  A 'practice', it's what you do. You talk about a limitation (or characteristic). Event data nodes display only those items that are common to all the events of this particular event case, so for example "old/new val" is not available if there is also a timeout that is assigned. If you do not need them, it does not matter whether they are there or not.

  This often isn't a problem because you usually only the new value and you can get that by placing the terminal control inside this event.

  If you need the specific event data node, create an otherwise empty case event dedicated to control and raise the timeout event temporarily affecting the timeout to zero using a shift register. Set the time-out period to zero in the case of timeout events. If the new value is also necessary in the case of a time-out, leave the Terminal inside event newval event data node timeout usage in the case.

• Increase control of the façade of a trigger button in the Loop Simulation

  I want the 'Index' control to automatically increment when you press the OK button. It works very well. However, the control of the Index gets automatically incremented whenever the VI is started and when you press the Stop button. Even if the box Structure is wired with a constant False (which means that it must never be run), control of the Index is still incremented.

  Is there a bug when using local variables within the structures of the case in the Simulation loop? This does not occur when you use a while loop.

  

  I think that since a loop of Simulation has no shift registers, you will need to use a feedback node.

  I have NO experience using simulation loops, just trying to help.

  See the example attached to see what I mean.