How to synchronize two chassis

Similar Questions

• How to synchronize two cards NI9215 DAQmx?

  Hello

  I use two NI9215 DAQmx cards (analog inputs sample simultaneous 4ch) in a cDAQ-9174 chassis type.

  Because I need to acquire 8 channels at the same time, I have two NI9215 cards.

  My question is how to configure these cards to be synchronized?

  I use LabVIEW2009 SP1 dev Suite.

  Thanks for the replies!

  One of the nice things about CompactDAQ is that you can put multiple modules of the same time (analog, digital, etc.) in the same spot and they are automatically synchronized.  Then, to synchronize the two modules, create an analog input task and reference strings like "cDAQ1Mod1 / ai0:3, cDAQ1Mod2 / ai0:3.  It automatically synchronizes the two modules together.

• How to synchronize two timers that send data?

  Hi, I have a problem:

  I have a thread in which I have two timers with timerTask. two of them will send data on the server. the first 5 sec every one and the all other the 1 sec the problem is that when I run the defective computer application (disconnection with an IOException error) after 3-4 sec, I think it's probalby because in an instant, both of them are trying to send data and can only be in one second. I tried to create both a dataOutputStreams but this is not enough. Here is my code:

  //in my thread, run method:
  
  public void run(){
  
   synchronized(_firstTimer){
  
  //send data every 5 sec
  _firstTimer.scheduleAtFixedRate(new TimerTask(){
  
   public void run(){
     sendData(_data1);
  }
  },0, 5000);
  }
  
  while(true){
  
    synchronized(_secondTimer){
  
  //send data every second
    _secondTimer.scheduleAtFixedRate(newTimerTask(){
  
          public void run(){
  
       sendData(_data2);
  }
  
  }, 0, 1000);
  }
  
  }//end of while
  
  }//end of run()
  
  //and sendData() method:
  
       public boolean sendData(byte[] _b){
              int length = _b.length;
  
              try{
                  _os.write(_b, 0, length);
                  _os.flush();
  
                  return true;
              } catch(Exception e){   return false;   }
  
          }//end of sendData method
  
  //where before in the code i've got:
  SocketConnection _s = (SocketConnection)Connector.open(_address);
  _os = _s.openDataOutputStream();
  

  can someone please provide all my advice how to fix this?

  Kind regards

  a solution would be a 'executable queue", a vector that contains objects that implement the runnable interface and executes one by one.
  the two timertasks add their treatment to the queue (synchronized) and directs the queue.

  It is a lot of material on threads synchronization available on the net because it is one of the most basic problems of treatment / distributed computing.
  I'm sure you can find detailed examples to sun.com and many other java sites.

• How to synchronize two profiles in firefox, everything except localstore.rdf

  Yesterday, I asked about the binding cache between two profiles in firefox:

  https://support.Mozilla.org/en-us/questions/925836

  And I got to thinking. The only reason why I'm even a second profile is to have two 'places saved window' for purposes of multi-monitor. I want that these profiles to be EXACTLY the same except for the location in which they are open (which is registered in localstore.rdf). It occurred to me that with my current setup in the thread above, even if the caches are now linked... I still have to change twice bookmarks. Have two different stories, saved passwords, etc. A minor inconvenience at best, but it would still be nice to avoid.

  As I said, I want these identical profiles, except for the locations in which they are open. I know there are extensions for synchronization of profiles, but they all seem to be 1 star performance that hinder the mess. I prefer to do it manually, as I did with the cache. Possible?

  Found an answer myself, mklink. I delete the places.sqlite (the file where the bookmarks are saved) my 2nd monitor profile. I then go to CMD and create and MKLINK by running the following:

  MKLINK C:\Path\to\Mozilla\Firefox\Profiles\monitor2\places.sqlite C:\Path\to\Mozilla\Firefox\Profiles\default\places.sqlite

  This creates a shortcut in my profile monitor2, redirecting to the profile folder of the monitor of my first for the file places.sqlite. TADA, the bookmarks are sync'd and the changes are saved to both directions. I developed this and created mklinks for formhistory.sqlite, cookies.sqlite and permissions.sqlite. Works perfectly and synchronizes both ways, as did places.sqlite.

• How to synchronize two ports data series at different frequencies of sampling?

  I have a .vi I'm reading two different sensors that operate at different sampling rates high.  I am able to read these two, however, there seems to be some problems of synchronization/strange offset with the devices.  The first device is a device running at 5 Hz GPS.  This is convenient because the time GPS is included in the data that I read.  The other device is a sensor operating at 6 Hz.  Ideally, I am recording the data of these two devices in the same file.  An example is attached.  It seems he collects GPS data, although it seems to write at much lower rates.  Strangely, as it is written to the file, it will slowly store 'blocks' of data in order to a much lower rate.  It seems that a lot of the GET of a buffer, and then it jumps ahead by about 5 seconds (see lines 214-220 of the attached file).  Meanwhile, the data from the sensor 6 Hz are get recorded normally.  I'm puzzled.  Would it not be better to connect these as separate sets of data in separate files?  Creating two executions of read/write "parallel" within the same .vi?

  Any help or examples, would be much appreciated!

  
  

• synchronize two exits of meter 6071E map

  Well, that's usually how to synchronize two problem of counters.

  I use the 6071E with DAQmx .NET 4.0. I set a task and attach to two channels with implicit synchronization and zero initial delay of meter output. When executing the program

  I catch the first edge with a single trigger to scope. There is always a delay between the first edge of ctr0 and the first edge of 16.3 microsecs ctr1. Is it possible, not to mention that affecting the initial delay of ctr0 16.3 microsecs to make meter always start together? What is the source of the delay(software/hardware) and must always remain constant.

  any help is welcome

  The source of the delay is that while he is in the same tasks that the counters are always started sequentially by software.  I'm surprised that the delay you see is constant.

  If you want the counters to start together, you must configure a start trigger.  As soon as you begin the tasks of meter in the software, issue the trigger to start to generate your pulse output.  Relaxation of beginning must be a signal of material - for example, you can configure a digital outputs in software timing and the lead back to one of the PFI lines.

  If you want to avoid any additional wiring, you could split the counters in two separate tasks.  Trigger a counter with the internal performance of the other (start the task that will be triggered everything first).  In doing so, instead of using an external trigger, I expect a delay between the order of 100 ns counters as the initial delay is at least 2 timebase tick.

  Best regards

• synchronize two cDAQ Chassis with DAQmx 9188

  I try to sync analog entry tasks on two 9188 Chassis utilzing the build in the BNC (PFI 0 and 1) ports.  I also have digital entry spots on the chassis of the master, I want to synchronize. Have been referencing http://www.ni.com/tutorial/5376/en/ and examples, I am not sure I have it set up correctly.

  From the link above, I exported the SampleCLK to PFI0 and StartTrig to PFI1 on the chassis of the master.  I have two BNC cables routed between ports on the two chassis.  I put the trigger DAQmx start on the slave to the PFI1 source (this does not seem to do both tasks at the same time), I tried to adjust the pitch of the DAQmx (sample clock) of source PFI0, but it creates an error (requested sample clock source is not valid).

  I can get the application of test runs by seting the slave clock "OnboardClock" sample source  When I use this setting, the task two seem to start at the same time, but I don't think the slave chassis uses the master module sample clock and therefore might drift over time?

  I would like to know how to properly synchronize the two analog tasks.  I also want to synchronize digital tasks on the main frame with the analog task.

  Hello

  If you want to synchronize the two tasks, you share examples of clock and triggers via PFI lines. The only exception is that it is not currently possible to synchronize tasks between the chassis that use AI modules with delta-sigma a/d converters.

  Best regards

  Villanueva of the DSL.

• I downloaded separately from all parties to a four-part harmony song, how can I synchronize. two or three playing together? Windows 7.Thanks.

  I downloaded separately from all parties to a four-part harmony song, how can I synchronize. two or three playing together?

  Hello

  Plenty of capable edition

  Audacity - free
  http://Audacity.sourceforge.NET/

  Audacity - Forums
  http://Forum.audacityteam.org/

  Free Audio Editor - free 2012
  http://www.free-audio-editor.com/

  Other sources of information:

  http://Forum.recordingreview.com/

  http://www.djforums.com/forums/

  http://Homerecording.com/BBS/

  http://www.pcmusicstuff.com/

  I hope this helps.

  Rob Brown - Microsoft MVP<- profile="" -="" windows="" expert="" -="" consumer="" :="" bicycle=""><- mark="" twain="" said="" it="">

• Is it possible to route signals of relaxation between two chassis PXI-1002 with the PXI-8335?

  Hello

  as the subject says, I am interested in the delivery of a signal to trigger between two chassis PXI-1002. At present, these two chassis are connected by a MXI - 3 system using maps PXI-8335. The software is Labview 2010 sp1 and 380 NIScope drivers.

  We want to keep (a PXI-5122 by chassis) scanners supply separated due to the requirements of our measure! The chassis are connected via cable to fiber optic. This explains why I can not just use the shutter release in Star, or connect via 'Trigger' or 'clk' cards (the inputs / outputs to the front of the cards).

  I found a few examples, but they seem to all be designed for use with a chassis only, I'll call later to the examples that inspired me to this point. Each guide explaining the synchronization of several chassis systems seems to use another material or VI is not accesible to me. This makes me wonder if my hardware has the capacibilities I need.

  The first picture shows approximately where I started from (sorry I can't post VI, confidential...):

  Only the middle part is interesting. Two sessions are initialized and manipulated parallel, trigger too. This has led to delays in the signals and should now be fixed. This apart from the VI works fine.

  Goal is to trigger only on one channel but both devices! If possible, the device will trigger must be chooseable.

  I started to rebuild the VI using the "EX Synchronization.vi 5xxx niScope' seeming spontaneity. The result is shown in the following image:

  

  I tried different RTSI lines, but had no positive results. only the main channel has triggered.

  After this first approach, I looked in the "niScope EX .vi multi-Device configured Acquisition (TClk)" and other examples of TClk which seem to work for similar problems. The VI of reconstruction can be seen in the following images:

  

  (Sorry, I had to use two photos..)

  In this case, I didn't have no choice for trigger lines, it would automatically set the VI TClk. I tried to trigger on both devices, though. This second approach seemed promising to me, but it was an error:

  "niTClk Synchronize.vi:1".

  Index (starting at zero) of the session: 1

  The error reported by the pilot of the instrument:

  No registered trigger could be found between the
  devices on the route.

  If you have a PXI chassis, the chassis correctly identify in
  MAX and make sure that it has been configured correctly. If you use PCI
  devices, make sure they are connected with a RTSI cable and that the cable RTSI
  is saved to the MAX. Otherwise, make sure that there is an available trigger line
  the trigger bus shared between devices.

  Source device: PXI1Slot4

  Target unit: PXI2Slot4

  Status code:-89125niTClk Synchronize.vi:1

  Index (starting at zero) of the session: 1

  The error reported by the pilot of the instrument:

  No registered trigger could be found between the
  devices on the route.

  If you have a PXI chassis, the chassis correctly identify in
  MAX and make sure that it has been configured correctly. If you use PCI
  devices, make sure they are connected with a RTSI cable and that the cable RTSI
  is saved to the MAX. Otherwise, make sure that there is an available trigger line
  the trigger bus shared between devices.

  Source device: PXI1Slot4

  Target unit: PXI2Slot4

  "Status code:-89125"

  This error came back even after I've identified this drug as possible to the MAX, as shown in the screenshot:

  

  In some of the textbooks, they showed how to get the MAX trigger lines, but as you can see, there is only booking options in my MAX. Whatever I do, I can't find options to define how to get my trigger signals...

  In principle, it is possible to trigger instruments in different chassis, which is indicated in this Guide and others... the question that remains is can it be done with my set of components?

  I understand that the use of multichassis compromised the integrity of the lines very adjusted as trigger in Star etc., so the configuration should be taken into account in some way, that my approach does not, I knew... But there must be a way to do this? And to start: to get just any signal from one device to the other trigger!

  For any advice on this issue, I would be very thanfull!

  Concerning

  Max1744

  Hi Max,.

  Thanks for the detailed post and explanations of your application and requirements. You're right using TClk, because this is the optimal method to synchronize the 5122 digitizers. The original VI you worked with is unique for some of the legacy scanners and does not directly work with scanners based on the most recent CMS (for example the 5122). The good news is that you can synchronize these cards to separate chassis, but it will use the calendar 66xx and synchronization (T & S) cards in the chassis of the master and the slave, as indicated in the guide that you have accessed. These are needed because a common reference clock must be shared between them as well as a couple of tripping. MXI itself can not handle export triggers and clocks, so there is no way to do this without physically wiring between the chassis with cards T & S. Unfortunately, regardless of what specific method, you use for synchronization, it will take a material extra beyond what you currently have.

  As one of your needs looks like it is necessary to retain wiring between the chassis directly, you may need to consider to synchronize using 1588 or GPS protocols. 1588 Protocol is a system for synchronization on the network while GPS course use antennas and locks for a common wireless signal. Although these synchronization methods may allow you to keep your chassis isolated, they will also require some manual configuration because you would be able to use the TClk synchronization and so the level of synchronization you can get between the cards may not be as good that can physically wire signals between the chassis using T & S cards.

  Hope this helps,

• How to synchronize the start of IT and relaxation the Scan list (DAQmx Switch)

  Hello

  I want to measure samples of N to the AI0 of Council NI PXI 4461. The measurement starts on a rising edge of a digital triggering provided to the PFI0 of the same Board. The measure is configured with samples of N/2 pretrigged. So far, everything is under control...

  Using an NI PXI 2567 Board, the signal applied at the entrance the 4461 (AI0) switches between a V2 and V1 signal. I would like to synchronize the switch between the two signals with the trigger signal applied to the input of the PFI0 Governing Council 4461. In order to obtain samples of N/2 of V1 and V2 samples N/2. Synchronization of 1 to 5 ms would suffice!

  My question is how to synchronize the start of acquisition of AI pretrigged of 4461 with the switch control given by the Council of 2567?

  Thank you in advance for your help...

  PS: the configuration of the system is:

  -LabView 8.5

  -Chassis PXI-1044

  PXI-4461 on slot 2

  Module 4-slot PXI-2567

  Hi Frederic,.

  I came back to this recently and used the following examples to run the desired synchronization.

  PXI-4461: Acq & graph tension-Int Clk - dig Start & Ref .vi

  Samples per channel = 1000

  Rate (Hz) = 10000.00

  Start the trigger Source = / [name of the instrument DAQmx] / PXI_Trig0

  Onboard start = fall

  Reference Source Trigger = DAQmx Device Name] / PXI_Trig0

  Reference edge = fall

  Trigger samples = Variable (100, 500, 900)

  PXI-2567: Switch Scaning-SW Trigger.vi

  Advance the output terminal full = / [name of the instrument DAQmx] / PXI_Trig0

  Scan list = / [name of the instrument DAQmx] / ch0-> com0.

  Scan list = / [name of the instrument DAQmx] / ch1-> com1;

  Hardware configuration:

  The PXI-2567 module controls an external relay that switches between the voltage of 5 V on ch0 and ch1 0 V.

  The PXI-4461 connects to the COM of the external relay and therefore reads 5V when ch0 is connected; 0 v when ch1 is connected.

  Procedure: The above examples are used in the following procedure.

  1. run the PXI-4461 VI.  A start trigger (falling edge) is necessary to start collecting samples before firing.

  2. launch the module, PXI - 2567 VI.  When ch0 is initially (and immediately) on com0, a trigger is sent to PXI_Trig0.  The PXI-4461 will begin to acquire samples before firing.

  3. - click on the "Connect to the next" button on the front of the PXI - 2567 VI module.  This sends a trigger to entry software for the PXI-2567 module and the transitions of the scan for ch1-> com1 list.  Once the PXI-2567 module remains (debounced), advanced complete relaxation is sent on PXI_Trig0 for the PXI-4461.  The PXI-4461 will begin to acquire samples after outbreak.

  Note: Instead of the trigger of the software entry, an external input trigger can be used (e.g. PXI_Trig1).

  Results:

  > Before instant release of samples = 100

  Delay is caused by the time of actuation of external relay.

  

  > Before instant release of samples = 500

  Delay is caused by the time of actuation of external relay.

  

  > Before instant release of samples = 900

  Delay is caused by the time of actuation of external relay.

  

  I hope that the attached screws and the explanation above helps you and/or other customers who have this problem.

  Best regards

  Chad Erickson

  Switch Product Support Engineer

  NOR - USA

• How to synchronize multiple devices (294 x) Rio usrp

  Hello

  I'm trying to receive 4 channels using two devices USRP-294xR (USRP RIO) to synchronously and run the example for the reception of several device program.   Often, I receive the error message "failed synchronization.  If I run the example several times in a row, this error message occurs more often than otherwise, but for all the times that he does not, I am able to collect data that seems like synchronous through the channels of reception.  So, in a way that works for me, but with the annoying feature that I need to run the program several times now until I am able to avoid the "Synchronization failed" error

  My installation includes an Octoclock connected to the Ref connections in and PPS in the two USRPs.  In the example, VI, I selected Ref in, but it is clear to me what choice should I use for relaxation.  Possible options are: 'Software', 'Immédiate', "Digital Edge", "Rx Start Trigger" and "Tx Start Trigger.  I had assumed my previous experience using these devices with the FPGA Ettus I would choose an option indicating that I tried to synchronize the external signal of PPS.  "External PPS" is not among the options of trigger, I'm confused as to how the synchronization.

  I saw the article below, but it's not not clear for me if I should be able to achieve my goal without making changes FPGA. It is possible to synchronize multiple devices using the program by default FPGA and example (i.e., for example RIO, not the host screw using the Ettus FPGA image)?  If so, any suggestions to help me avoid this error "synchronization failed"?

  http://zone.NI.com/reference/en-XX/help/373380D-01/usrphelp/synchronization/

  Thank you.

  Rob

  rkossler1 wrote:

  Since we did not have a 6674 t, I thought I might as well try to connect PPS from a RIO USRP to PPS on the two RIOs USRP.  I just used a BNC - T to "distribute" the relaxation.  It did not work - maybe for the same reason you mentioned on the PPS USRP out is not strong enough for the Octoclock by car.

  Yep, that's exactly it. The USRP RIO is not output enough power on the PPS TRIG OUT line to drive the lines of PPS TRIG IN two USRP RIOs, unfortunately

  rkossler1 wrote:

  How can I know which USRP RIO is the 'master '?  Do I need to designate in the software?  I chose arbitrarily use the device for which I have connected the PPS on the BNC - t 'RIO0', but I don't know how the SW knows what USRP I chose to connect the power cord to.

  The USRP captain's exit a PPS TRIG OUT in PPS TRIG IN sound. then all the USRPs you set this unit as the * first * device in the table of features of RIO for the façade of synchronization with a cross screw.

• How to add two lines when the second row is not visible, but also gets the first data line too?

  Mr President

  Jdev worm is 12.2.1

  How to add two lines when the second row is not visible, but also gets the first data line too?

  I want to add two lines like below picture, but want the second to remain invisible.

  

  I asked this question but my way of asking was wrong, that's why for me once again.

  Concerning

  Try to follow these steps:

  1. in the database table to add the new column "JOIN_COLUMN" and add the new sequence "JOIN_SEQ".

  2. Add this new column in the entity object. (You can add this in entity object by right clicking on the entity object and then select "Synchronize with database" then the new column and press on sync)

  3. in your bookmark create button to create only one line NOT 2 rows.

  4 - Open the object entity--> java--> java class--> on the entity object class generate and Tick tick on the accessors and methods of data manipulation

  5 - Open the generated class to EntityImpl and go to the doDML method and write this code

    protected void doDML(int operation, TransactionEvent e)
    {
      if(operation == DML_INSERT)
      {
        SequenceImpl seq = new SequenceImpl("JOIN_SEQ", getDBTransaction());
        oracle.jbo.domain.Number seqValue = seq.getSequenceNumber();
        setJoinColumn(seqValue);
        insertSecondRowInDatabase(getAttribute1(), getAttribute2(), getAttribute3(), getJoinColumn());
      }
  
      if(operation == DML_UPDATE)
      {
        updateSecondRowInDatabase(getAttribute1(), getAttribute2(), getAttribute3(), getJoinColumn());
      }
  
      super.doDML(operation, e);
    }
  

    private void insertSecondRowInDatabase(Object value1, Object value2, Object value3, Object joinColumn)
    {
      PreparedStatement stat = null;
      try
      {
        String sql = "Insert into table_name (COLUMN_1,COLUMN_2,COLUMN_3,JOIN_COLUMN, HIDDEN_COLUMN) values ('" + value1 + "','" + value2 + "','" + value3 + "','" + joinColumn + "', 1)";
        stat = getDBTransaction().createPreparedStatement(sql, 1);
        stat.executeUpdate();
      }
      catch (Exception e)
      {
        e.printStackTrace();
      }
      finally
      {
        try
        {
          stat.close();
        }
        catch (Exception e)
        {
          e.printStackTrace();
        }
      }
    }
  
    private void updateSecondRowInDatabase(Object value1, Object value2, Object value3, Object joinColumn)
    {
      PreparedStatement stat = null;
      try
      {
        String sql = "update table_name set column_1='" + value1 + "', column_2='" + value2 + "', column_3='" + value3 + "' where JOIN_COLUMN='" + joinColumn + "'";
        stat = getDBTransaction().createPreparedStatement(sql, 1);
        stat.executeUpdate();
      }
      catch (Exception e)
      {
        e.printStackTrace();
      }
      finally
      {
        try
        {
          stat.close();
        }
        catch (Exception e)
        {
          e.printStackTrace();
        }
      }
    }
  

• Install Oracle GoldenGate Linux to synchronize two schemas from database on a single server

  Hi all

  I have to synchronize two schemas from database (Oracle 12 c) in a single host RedHat Linux to demonstrate and understand the use of OGG V12.1.2.1.0. I try to do. But it's complicated and confused me because I am new to Oracle and Linux. I followed this tutorial ( install Oracle GoldenGate for Oracle 12.1.2 on CentOS/6.x to 6.x/RHEL Linux 6.x EL ). But it is difficult to understand how I can match with two diagrams of database on a single server.

  
  And I found this tutorial (Oracle GoldenGate on Linux: two-way replication of Oracle 11 GR 2 to Oracle 11 g 2). He said: "" If you have that one host, it may be useful to change the /etc/hosts file to create aliases forhost01.example.com and host02.example.com.". What it really means?

  The other seems to be useful. But it's totally different from 1. Is that this will help my job since I use 12 c Oracle Server?

  Can I get some tips to continue my task?

  Here's another tutorial - http://www.oracle.com/webfolder/technetwork/tutorials/obe/fmw/goldengate/12c/OGG12c_Integrated_Replicat/index.html

  It has everything set up on a single Linux host.

• How to synchronize the complete catalogue with mobile phone

  I plan to update my old LR5 to Lightroom CC.  The idea of making all my changes and management of any of my devices is interesting for me, so I downloaded the demo to test the functionality.  I quickly discovered, however, that I can't synchronize my catalog, only the collections - and only non-smart who.  I don't know if the feature is really limiting as it sounds, or if I'm just not understand it.  So I came here for help!

  I always got my photos via a hierarchical directory... structure loosely, yyyy/mm/eventname.  If it is really only possible to synchronize collections static, all my pictures in this directory structure are prohibited to Lightroom.  It seems to me that if I want to change (or even see) my photos on my iPad and al, I need to import my photos in Lightroom, as usual and then manually maintain a collections structure that reflects the structure of my library.  Is this the case?

  Am I misunderstand how the synchronization works?  I put my catalog organized for editing with Lightroom Mobile online somehow?  Or I would be limited to only the photos that I manually maintain collections for?  (I say "would" because it is way more trouble than it is worth for me)!

  Help me get into this cloud thing!  I only 29.5 days left on my trial to find a solution!

  It is probably not enough space to put your catalogue online cloud and it would be very slow.   The synchronization process is for the initial edition more than the most recent shoot with the rest of the edition that happens on your desktop.

  I have two desktop computers and put my catalog and recent photos on a USB drive connected and who back up to another USB drive connected, in case I lost or destroy my external drive.

• synchronize two physical databases

  How can I synchronize two databases SQL Modeler, or SQL dev? Whatever one will work.

  Discover the characteristic of Different database in SQL Developer.

  You can also create a template of each database and to compare a model to generate an alter script.