DAQmx Open task request

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• Do you need 'DAQmx start task' vi read from a device NI DAQ (NI 9205)?

  I have a NI 9205, which I use to get a waveform data. To get started quickly, I used the wizard DAQ Vi. The code below (FIGURE 1) is the acquisition of data help VI looked like when I convert LabVIEW code and made some minor adjustments.

  When I looked online to see how to get hardware DAQ data, many sources use the task start DAQmx in figure 2.

  DAQmx start using VI makes another?  Materials using DAQ assist in loop gives you a lack of performance?    If so, figure a will have a lack of performance too as it is basically the DAQ help code?

  FIGURE 1

  Hello sticyfinger,

  Help for the Start Task function:

  "If you do not use this VI, a measurement task starts automatically when execution of the reading DAQmx VI. Automatic start of theDAQmx VI entry write determines if a build task starts automatically when the execution of the writing DAQmx VI.

  If you do not use the DAQmx start task VI and VI task DAQmx stop when you use DAQmx Read VI or VI to write DAQmx several times, as in a loop, the task starts and stops several times. Start and stop a task repeatedly reduce the performance of the application. »

  Hope that helps!

• Error-50103 occurred at DAQmx start Task.vi:11

  Hello

  I use a nor-6008 to perform a thermal sector and I get the error "error-50103 occurred at DAQmx Start Task.vi:11 '. I have read other forums of discussion and it seems combe because I use the wizard DAQmx who don't properly resolve the resource when finsihed. I've dug further and saw that it is linked to an on-board clock synchronization problems. However, I can understand how to solve this problem.

  I thought that I create a loop that continuously monitors inputs and sometimes to interrogate the memory so I'm not kidding to the top of the clock. It's much harder to do than sounds. Can someone take a look at my code and give me some advice/suggestions to clean the DAQmx assistants.

  Thanks in advance

  Cole

  I finished by dividing my resource between the two input channels using a single assistant DAQ and dividing down the data rate and the number of samples. Works fine now.

  Big pain in the ass well.

• Stand-alone application with LabView 7.0 get error cannot find DAQmx clear task.vi

  I tried to create a stand alone vi with the Build Application or shared Library (dll) in LabVeiw 7.0

  When I put it on another PC to test it I get the error "cannot find DAQmx clear task.vi.

  the other PC also has 7.0 and 8.1 DAQmx Labview.

  I think my problem is in the source tab, where you are supposed to add dynamic vi and support, I have search the forums and database of nor and have not found a solution.

  Hi LabTech09,

  When you run the executable file on the other computer, that's when you get this error?  You have the same exact versions of DAQmx and LabVIEW on both computers?  Is the dialog box allow you to navigate to the clear task.vi DAQmx?  If so, you can find these screws in C:\Program NIUninstaller Instruments\LabVIEW 7.0\vi.lib\DAQmx\configure\task.llb.  The executable runs on the development computer (the machine, it was compiled on)?

• Daq stop task VI back to the State of the task was really forward the DAQmx Start Task or DAQmx writing?

  Hello

  I use DAQmx and DAQ Assistant and try to get the details on the following questions.

  1 does Daq stop task VI really return to the State of the task is in front the DAQmx Start Task or DAQmx writing? Digital Input taking as an example, I don't think that the status of the task means that input data because I tried and I can't really back to the entry level it was.

  Maybe more experienced people can help to share their expertise.

  2. the information in help indicates "virtual channels created with the function/VI DAQmx create Virtual Channel are called virtual channels the and cannot be used in the task." But I don't know what "in his work" means.

  3. could I get some guidelines or expertise on the Labview programmers when use virtual channels the and when, to the more global?

  Thank you!

  Best regards

  Allen

  If you create a channel of the task, or scale just usuing the screw to create or Assistant session wire io is the only way to pass the info autour.  It is not saved anywhere on the disc.  A channel of the task or the scale in a project can be used by anything in this project.  A channel of the task or the scale recorded in MAX can be used by anything on this machine.  Its an extended thing.

  And Yes, the DAQ Assistant fresh extra performance overhead and the poor than the DAQmx API.  Often, it won't have the impact of a little experiment.  Large applications should avoid the express Visa.

• When I open Task Scheduler and click on MSE for planning, I get the following warning. General Page initializatin has no 0 x 80070534

  Original title: Task Scheduler

  When I open Task Scheduler and click on MSE for planning, I get the following warning.

  General Initializatin page failed,

  The specific error is:

  0 x 80070534: no mapping between account names and security IDS was done. Year error has occurred trying to retrieve task account informaiton. You can continue to edit the subject of the task, but will not be able to change task account information.

  I then press the ok button and it goes to the task, schedule, and the settings box.

  When I check in scheduled tasks, to see if they ran as planned, the last run time column NEVER said, and the status column indicates

  COULD NOT START.

  In the morning, I always get this error message:

  A task could not run...

  Do you know what I'm doing wrong? Can it be fixed?

  Thank you Tim

  Is there a password the user account in which the task is scheduled?  You cannot schedule a task to run under a user without password account.

  You can also take a look at advanced > view the log window scheduled tasks.

• After the race VM Workstation - remove the key opens "Task Manager"

  Hi all

  After using VM Workstation (use open then exit program) any time I hit the key Suppr - the Task Manager appears.  I can restart my machine to eliminate this problem. Function clear ideas on how to remap the key to its original?

  have you tried hitting ctrl + alt before leaving the vmware customer?

  http://ServerFault.com/questions/99196/after-running-VM-workstation-delete-key-opens-Task-Manager

  StarWind software developer

  www.starwindsoftware.com

• SQL Help: selection of tickets without open tasks

  Hi gurus,
  
  I'm new to SQL. I need your help for a script where I pick up tickets without open tasks.
  Say, here is the table of tasks
  
  Table: task
  
  ------------------------------
  | TicketID | TaskID. TaskStatus.
  ------------------------------
  | 1. 1. O |
  | 1. 2. O |
  | 1. 3. O |
  | 2. 4. C |
  | 2. 5. C |
  | 3. 6. C |
  | 3. 7. O |
  ------------------------------
  The query should return the ticketid (s) with all its taskstatus = 'C '.
  
  Any help would be much appreciated.
  
  Thank you

  Hello

  surya_vus wrote:
  Frank,

  Your query will exclude other State of the task?

  Try it and see!

  If, in your real problem, the relevant information are spread over three tables, then join them.
  If there is a condition of additional, based on reason, then add that. The WHERE clause is the most logical place.
  If you are interested in taskstatus in 'C' or 'F', then test for one or the other.

  If the GROUP OF... HAVING solution is:

  SELECT       ti.ticketid
  FROM       ticket     ti
  JOIN       task          ta     ON ti.ticketid          = ta.ticketid
  JOIN       taskstatus     st     ON ta.taskstatusid     = st.taskstatusid
  WHERE       ti.reason     = 'C'
  GROUP BY  ticketid
  HAVING       COUNT (*)     = COUNT     ( CASE
                           WHEN  st.taskstatus IN ('C', 'F') THEN 1
                        END
                      );
  

• Clear any open task daqmx

  Hello

  I was going crazy, because all of a sudden a tasks analog output did not work any more he said it conflicted with another task "always active"... I searched my entire application. Could not find anything. So finally, I closed the application labview together, and then it worked again, as if by magic. I came to the conclusion, that my stop and and clear task was not called when I closed my program in a different way.

  So my question: is there a possibility to see what daamx tasks are active when you start your program, so that you could erase any existing task?

  Kind regards
  Thijs

  Better yet, DAQmx tasks really need to be created once, preferably during development and no runtime if you can avoid it at all the.  Presist them to the project (if you are deploying in a debug environment) or, for MAX, if you deploy a exe.  It also allows your tasks be available for troubleshooting and integration, or even a FPS "Engineering" for the station.  I don't remember the last time I've delivered a solution the DAQmx encluded create Task.vi.

  Its pretty easy to write yourself a little utility to give up and cancel all tasks DAQmx.

  

• Error-200022 occurred at DAQmx start Task.vi

  Hello

  I have peripheral cDAQ and 3 modules that nor-9234 connected.

  My program (see attachment) works correctly with only 2 modules, but does not work with 3 modules.

  With 3 modules I have this error: "error-200022 occurred at Task.vi DAQmx Start.»   "Possible reasons: resource requested by this task has already been reserved by another task."

  To solve this problem, please help me

  Thank you

  Now I understant the error. This is correct (see below)

  

• SOA email notification when Chief rejects the task request.

  Hi all

  We have E-mail SOA trip when the manager approves / denies the request he received notifications ask an end user or a subordinate.

  We use composite Manager recipient OOTB SOA for it. We have configured Notifications in the ApprovalTask.task in the Jdeveloper. We have models of email as when manager approves the request, it will trigger a notification email (say notification1). When the Manager rejectes the demand it will trigger tell (tell notificaiton2) email notification. But in the ApprovalTask.task-> Notifications tab we only "Completed" as the task status. How we can configure model e-mail when Chief rejects the request.

  Please help me

  KK

  If she isn't here OOTB, you may need to add a task Notification by e-mail in the workflow of unzip and opening it with JDeveloper.  From there, you can capture a response in the payload of "REJECTED" and have an e-mail sent to the Manager of beneficiary, or that you want.

  -Kevin

• How to set DAQmx period task input terminal

  I have a measurement period counter as task created in VB6.0 using Measurement Studio 8.6 and NOR-DAQmx. Is it possible to configure the input (door) to be PFI0 instead of the default Terminal.

  Thanks, vecsol...

  The terminals of the meter are wired on certain pins on the DAQ card.  The door of the Terminal is not set for a 'default', the door of the meter is connected to a certain line of PFI - this cannot be changed.  See help NI - DAQmx Device terminals for more information on PFI line corresponds to what terminal of the meter.

• Daqmx timed task - Help!

  Hello

  Looking for the online help on a task daqmx timed.

  I am trying to run 2 fans using tasks of acquiring data MX for some time. The sequence is the following:

  1. start the FAN 1 and run for 2 minutes.

  2 after the 2 minutes time, STOP FAN 1 and FAN 2.

  3. operate the FAN 2 for 3 minutes.

  I need to help, incorporating a timer in the task.

  I would really appreciate if the community would throw an overview of this. (Maybe a quick picture of the code?)

  Thank you

  RP.

  
  

• more info on the DAQmx control task

  Today I came across an older post where I had some questions and Jeff· just Þ· Bohrer showed a good example, it's here:

  http://forums.NI.com/T5/LabVIEW/AES-single-element-queues-data-value-references/m-p/2978093/HIGHLIGH...

  I doesn't pay attention to the DAQmx task manages the part, but now some new questions of time came to my mind, I hope someone can give me some explanations...

  Usually, when I'm working with some hardware with DAQmx driver, I simply specify the channel, and I use the VI of virtual channel create for my work I want to use.

  Recently I read about benefits use MAX to previously create some global (?) of the tasks (for example a cDAQ with many modules and i/o channels) and using these tasks in a LabVIEW project. In this case I can just skip the 'Create Virtual Channel.vi', begins with the measurement with a "Start Task" DAQmx and stopping a VI 'stop the task', correct? However in the link above, the VI "Task of control" (next), first used with a parameter "commit" and during the closing of the measure, with a setting of "Cancel" (and no task to stop vi was used).

  I threw an eye using the Task.vi 'control', but the info it is not too detailed, where I can find a few more details, or maybe someone might highlight the use and benefits of this vi? Sounds a bit 'funny' aid, as for the parameter commit: "Programs the hardware as much as possible depending on the configuration of the task."

  So what is the difference between the use of the "task of control" in a code and do not use it (so when we use only the start and the stop task live)? Do we not the same behavior with the latter?

  Thanks in advance!

  Martins wrote:

  The overall task configured max subject: we conduct research, so I always just develop for our lab, we do not sell anything. However, I have some questions related to a task configured and saved to the MAX:

  • So I have a task created at MAX, I guess that this task will be usable only if I use it in a project of LV on the same PC? What if I need to move my application to another PC (but of course with the same modules cDAQ, etc., but perhaps under different numbers...)

  The task can also be used with a .exe. You can export MAX settings to a file (file, export...) .nce, and then import the settings to a new PC. If necessary you can tweek the numbers.

  • I would like to create an EXE from my code and don't run this EXE to our systems (not install). Y at - he tips that I should keep in mind when I create an executable from a project that contains a task of MAX?

  I can't think of something special. Personally, I prefer to load the name of the task from a configuration file, you can also use a control on the front panel to select the task.

  I have a feeling, when we need complete flexibility, the course of MAX isn't really practical, Yes? I want to say, if we want to for example programmatically recognize all our application materials and create tasks to ensure that all physical changes on the side of the PC in the future will not affect our code?

  I agree that you have as much flexibility, but for my applications most of the time MAX provides sufficient flexibility

  But this scenario could be documented for future users in the lab, I imagine, so what they have to do, is to recreate the overall task? What happens when we take the application as an exe on another PC and manually re-create the (I hope that quite the same) necessary global task with the same name that awaits the EXE? It works this way?

  Thanks for the very useful info!

  Edit: "Yes you can set a MAX task that includes several modules and channels so that they all have the same type of action."

  This is also a limitation compared to the creation of code depending on task, Yes? I mean, using the DAQmx 'Create Virtual Channel.vi', we can even combine for example analog inputs with for example in a cDAQ thermocouple hunts...

  No it is not a limitation, for thermocouple is entered analog. If you can combine them in LabVIEW, you can combine them in MAX.

  Edit2: I really miss other docs of type "real demonstration" of the NEITHER! I could imagine a sort of case study examples where different material handling OR would be explained... Of course we can hunt together pieces of mosaic, but a more compact image could help a lot for those who want to learn faster

  Ben64

• How to measure the frequency of NOR-DAQmx RPM tasks

  Hello

  I'm trying to measure the frequency using the NI DAQmx task and then convert it to a RPM if possible.

  I have the following material available to me.

  I have a block SCXI-1327 terminal, as well as a 6289 PXI multifunction data acquisition Module SCXI 1126.

  I wired in a mag ai7 sensor on my 1126 and then of the passage of an object metal I get a range of 6-8, so I am able to read the mag sensor.

  What I'm trying to do is somehow convert this analog measurement a RPM using the NI DAQmx task only.

  Any help would be appreciated.

  Hi, smooth,

  Yes, you would select linear, then put in the result of this calculation of the slope.

  The Manual recommends a minimum frequency of at least 15 Hz for setting low range. This card is not really designed to measure the frequency for a single pulse over a long period of time.

  The number of LAPS down (assuming one pulse per turn) that we recommend that you measure with the 1126 is so 900 RPM. If you need measure low revs, and you cannot increase the number of impulses per turn, you could consider either read the signal as an analog waveform, or if it's a digital pulse, using a counter to basic task. In this way, you can use any method you want to handle the situation where there is only a single pulse in a long time.