How to count the pulses with digital input on 6351

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• How to count the pulses using RIO (FPGA)

  Hello

  I want to use RIO (FPGA) for counting the pulses produced by a sensor,

  but I don't know how to program. can someone help me.

  Thanks in advance

  CAIX wrote:

  Hello

  I want to use RIO (FPGA) for counting the pulses produced by a sensor,

  but I don't know how to program. can someone help me.

  Thanks in advance

  Search for example for 'Meter of RIO' finder.  There are dozens of examples that should help you.

• I want to generate a pulse of a meter train and count the pulses with the other counter on a USB NI DAQmx 6259.

  
  

  Salvation;

  Here is the solution for your problem.

  The cause is that "Gen dig Pulse Train-Finite" uses Ctr0 both Ctr1.

  Please refer to:

  "When you do a finite pulse train generation, a counter generates pulse train, and the other counter generates an impulse that acts as a barrier to the first counter. If you change the pulse train to generate continuously or

  only generate a pulse, you can run two tasks of meter at the same time without error. »

  http://digital.NI.com/public.nsf/allkb/04BEDD9E9E91ED3486256D180048116D

  I used Ctr0 and Ctr2, jumping Ctr1 as it is reserved by "" Gen dig Pulse Train-Finite ". I works very well.

  Kizito.

• How to count the fields with the bit data type

  Hi friends,
  I'm stuck in this report.
  My responses as it looks.
  
  region... offices... groups1... work2.
  A..........a1............. 0..........1
  A..........a2............. 1..........1
  A..........a3............. 0..........0
  B..........a1............. 1..........1
  B..........a3............. 0..........0
  
  Here 0 and 1 are values of bit (true and false)
  I need to create a report that matter works if the value is true (1)
  as...
  Region... total_Work1... total_work2
  A................... 1.............2
  B................... 1.............1
  
  and
  Offices... Total_work1... Total_work2
  a1............... 1.....................2
  a2............... 1.....................1
  a3.............. 0......................0
  
  Please help me calculate this total when core values are few.
  
  Thanks in advance

  Hi Toony,

  This is caused by internal database storage, a true is stored in the form of-1. Just take the integer ABS (absolute).

  concerning
  John
  http://obiee101.blogspot.com/

• How to concatenate the string with a digital command?

  Hello

  How to concatenate the string with a digital command?

  Thank you.

  

  I think I forgot to add the semicolon, what you can do is, drag the CONCATENATE function and add semicolon.

• How to count the time exactly?

  I tried to count the time using a VI like the one attached.

  It's that's not couting correctly. There is a possible reason, I have observed.

  The computer isn't able to handle the VI as soon as necessary.

  I thought about this because, when in edit mode the time count was very bad, and, when I created an application and installed, it ran okay, how 'light '. But today, when I tried to use this application with an old computer it did not work. The clock is slow.

  Is it possible to count the time correctly?

  I use a DAQ6009 to make my works, my VI is big enough and I need one iteration to each 1 ms (milliseconds) as I am with digital inputs from 5 events of coders (I know that's not the right way to count the encoders, but it's the only way I can do it, and it works).

  Thank you in advace! I hope you can help me!

  Hugs!

  Ok.  I will try to help you understand certain things.

  The number of cycles and wait (and wait until the next ms Multiple) functions all use a 1 kHz derived from the clock of the processor clock. The accuracy of these clocks is not large, although they are probably similar to the precision of the stopwatch.  Any time generated by these functions will show some differences in the time of the clock as it is derived from a different oscillator.

  Updates from the front panel are time by LabVIEW and the operating system. Most of the screens are updated with 60 to 80 times per second, maximum. What made the operating system, an update of the screen might be delayed by 10s of milliseconds or more.  It is certain that not all of the values at the end of the Add function will be displayed.

  Wait for him until the next ms many will wait more than 1 ms if the other code in the loop takes longer than 1 ms.  I don't know, but I think that the indicator is buffered so that any delay by the operating system to update the display should not slow down the loop. I tried to remove the flag, and it doesn't seem to make a big difference.

  I modified your VI to provide several indications of the performance. First of all, I added to the sequence of three-frame structure to allow synchronization of the loop. Second, I changed to a loop which runs a specified number of iterations. Thirdly, I hooked up the output of the timer until the next ms Multiple to a tunnel of autoindexing allowing a record of the time of each iteration appears in the table of ticks. I calculated the differences between successive instants and poster on a chart, so that you can see the performance.

  I didn't want to sound criticism of your use of English.  You write in English, much better than I could in your language!  What I was trying to make is that such general descriptions that ' Besides correctly ' without quantitative results or evidence in support of the application do not have enough information to help us help you.

  Lynn

• Programming of the event with digital I/o

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  Howard.

  Yes, you can register events DAQmx.  Look in the IO position-> data DAQmx-> Advanced-> palette of events acquisition DAQmx to start, or search for events DAQmx.  All DAQmx devices support events of change detection, which is probably what you want if you have the digital I/o, in order to verify that it is supported by your device.

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  Hi all
  
  
  We have 10g database of primary and standby, I have never worked before sleep, customer wants me start switch, can you please let me know how to make the transition to digital in 10g.
  
  
  Thank you very much.

  It's the way I'm following passage in the
  ------------------------------------------------------------

  (1) check that there is no active users connected to databases.
  (2) select message from v$ dataguard_status;
  (3) select protection_mode from database v$.

  Step 1 check if it is possible to perform a failover.

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  ---------------- ------------------------------ -------------------- ---------
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  SQL >

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  SQL > SELECT SWITCHOVER_STATUS FROM V$ DATABASE;
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  -----------------
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  1 selected line

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  SQL > ALTER DATABASE COMMIT AT THE GRADE CROSSING;

  Step 6 complete the transition of the database ensures the main role.

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  SQL > SHUTDOWN IMMEDIATE;
  SQL > STARTUP;

  Note: There is no need to close and restart other bases before (not involved in the digital switchover) who are online at the time of the failover. These databases on hold will continue to
  function normally once the failover is completed.

  Step 7 if necessary, restart log apply services on standby databases.
  He must deliver the command FRO repeat apply as:
  SQL > change database recovery managed standby database disconnect from the session.
  or
  And stop repeating applies to give
  SQL > alter database recover managed standby database cancel;

  Step 3 Shut down and restart the former primary instance.

  SQL > SELECT OPEN_MODE FROM V$ DATABASE;

  Step 9 check the synchronization between the primary and standby:

  Primary
  SQL > select thread #, max(sequence#) in v$ archived_log where archived = 'YES' group by thread #;

  Sleep mode
  SQL > select thread #, max(sequence#) in v$ archived_log in case of application = 'YES' group by thread #;

  Stop the former primary instance and restart and mount the database:

  Sense of SWITCHOVER_STATUS
  --------------------------------------------
  The column SWITCHOVER_STATUS of v$ database can have the following values:

  NOT ALLOWED - this is a database of pending and the primary database has
  not been first switched, or it's a back-end database and there is no data pending.

  ACTIVE SESSIONS - indicates that there are active sessions of SQL attached to
  the primary database or emergency that must be disconnected before the
  failover operation is allowed.

  Transition to THE PENDING - this is a database of relief and the primary database
  application of the digital switchover has been received but untreated.

  LATENT pass - the digital switchover has been waiting mode, but has not completed
  and I went back to the primary database.

  Primary SCHOOL - this is a database of pending, any sessions active, i.e.
  allows to switch to a primary database.

  In STANDBY mode - this is a primary database, any sessions active, i.e.
  allows to switch to a standby database.

  RECOVERY NEEDED - this is a database of pending that has not received the
  application of the digital switchover.

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