Similar Questions

• Control PXI via PyVisa devices?

  Is it possible to control PXI peripheral via PyVisa in the same way as USB and GPIB devices?

  Hi k-rhyme.

  It should be possible to do so. You can definitely control devices with NI-VISA PXI and PyVISA is simply a Python wrapper, it should be possible. It also depends on the version of VISA that is using PyVISA. I recommend you look at the manual of user NI-VISA for more information PXI of specific functions.

  With the help of the Assistant of the Driver NI-VISA and NI-VISA to develop a PXI (e) /PCI (e) driver in Windows

  http://www.NI.com/Tutorial/4713/en/

  NI-VISA user manual

  http://www.NI.com/PDF/manuals/370423a.PDF

• PXI-4072 can measure a pulse width?

  Can I use a pxi-4072 DMM to measure a pulse width? With the help of labview8.6.1 can I get period information and freq but I am interested in duty cycle. Thank you, Kenneth

  Hi Kenoss,

  If you use the PXI-4072 to acquire waveform data, then you can try to use the Measurements.vi impulse to get the duty cycle.

  

  Best regards

  Tony_G

• the instruments of control french PXI multifunction or ¿VISA?

  Salvation;

  Do you know if you can control an instrument (e.g., PXI-4045) PXI with VISA or you can use the functions of the Commission of the service?

  Thank you

  Ok

  very useful review

• Connection cRio 9074 second port ethernet to another device via VISA

  I'm trying to connect a DAQ Yokogawa system to a cRio 9074 via the second ethernet port. I activated the second ethernet port of the cRio with a static IP address on the same subnet as the data acquisition system. I installed the driver NI-VISA and NOR-SERIAL on the cRio. I can compile the code on the cRio and I'm sure that the code works when I connect to the acquisition of data to a PC. I get an error on the open VISA VI.

  Am I missing something or is it not possible to connect the second ethernet port on the cRio in this way?

  Thank you

  Thank you for your response. I found the same information that you provide, but decided to give it a try.

  A few minutes ago, I was able to perform communication between the cRio 2nd access Ethernet DAQ Yokogawa. I managed to do it using the VISA controls. To communicate with the host PC, I get the information of the DAQ with the cRIO as described above and then use shared variables to publish data on the network connected through the first ethernet port.

  If anyone wants to reproduce it just to make sure that the two ethernet ports are configured with IP addresses on different subnets that are configured for TCP communication. If more details are to be simply send me a message.

  Kind regards!

• Digital time line controlled PXI-6251

  Hello

  I need to create a Boolean control moment.

  For example, a digital line is set to False. I would like to change to true status for a certain period of time (e.g., 150ms).

  Is this possible with PXI-6251?

  Thank you

  Hello

  Yes you can. Set a task in the buffer output as e.g. "digital - end Output.vi.

  You can use an external clock, it generates throught counter output or use ananog/output sample clock.

• Facilitate communication instrument via VISA/dll library

  Hi, I just receive a new piece of equipment that I would like to order via Labview and I am having trouble to communicate began with the device - a spectrometer in Acton (previous on the topic post). The device can connect via a usb or RS-232 cable and appears in as COM 5 and correctly Device Manager the label as the spectrometer of acton.

  I have the instrument dll file and the header file and a detailed description of all the functions but I'm scared, I am at a loss to know how to start. I already wrote labview programs to communicate via the read/write functions VISA but this instrument communicated through hexagonal orders and seemed easier for me to work with this new instrument where it looks like I need to send commands to chain - I'm getting lost in the syntax and correct structuring of the functions. The node to call a library function lists the functions of the dll, but I'm not clear on how to take of the generic Sub funcname (void); and match it to their arguments and the functions described.

  I'm also not sure what options I have to communicate with the instrument, is using the dll with node to call a library function at a level equivalent to sending a command string via the entry VISA, or are what they used in combination or can the nodes to call a library function be used alone for release with the instrument? I understand that these questions are very basic/generic I have just had trouble finding resources to learn the answers to these questions as links to be NEITHER documentation/examples or other messages from the forum would be greatly appreciated.

  I am including as an example some info on the first basic command I would start as per - a simple device search command:

  ----------------------------------------------------------------------------------

  "detailed description":

  ARC_Search_For_Mono, function used to search for attached Monochromators. With the
  exception of ARC_Ver, must be the first function call.
  Delphi: function ARC_Search_For_Mono (on Num_Found: integer): wordbool;
  STDCALL;
  VB: Private Declare Function ARC_Search_For_Mono Lib "ARC_SpectraPro.dll".
  (Num_Found As Long) As Integer
  Num_Found: The number of research Instruments Acton found and listed.
  Enumeration list begins with zero and ends with Num_Found minus one.
  Result: True, if all of the instruments where found.

  ----------------------------------------------------------------------------------

  a code in the dll header file:

  typedef unsigned _int16 (CALLBACK * LPFNDLL_Search_For_Mono) (long &);)

  ----------------------------------------------------------------------------------

  Any help would be appreciated, I think I just need a little help to get started. Thanks in advance!

  Because you neglected post in the the model number of this intrument, everything would be conjecture at this point.

• Custom control with look system visa

  Hello, I would like to have control of Visa's resource name with the same look like a ring system. See the file attached what I mean. I'm not sure how to work with the customization tool, I need some advice.

  Is there any library on the web with xcontrols and custom controls?

  Kind regards

  Jimmy

  Would the .ctl I have attached to this workstation for you?

  Control of NI-VISA for Style XP

• LCR PXI-4072 floating or not floating device

  Hi all

  My question: 4072 LCR is a floating or not floating device (used for the measurement of the capacitance)?

  Thank you...

  The Hi and Lo led float in reference to the ground regardless of the configuration of the 4072.  Note that allowed on the 4072 maximum common mode voltage is 300VDC/CaRMS.

• RMAN backup using control as repository via networker file

  Hi guys,.
  
  I use the control as the rman repository file. Currently I have this backup running at 20:00 every night:
  
  backup format full filesperset 4 ' / Data_%d_%U/' (database);
  SQL 'alter system switch logfile;
  SQL 'alter system archive log current';
  overlap archivelog all;
  backup format '% s_ %%t p_ arch_' archivelog all;
  delete archivelog all completed before ' sysdate-3'; "
  
  And the log backup archive running from 07:00, 11:00, 16:00.
  
  
  Have a few queries:
  
  1. understand that with the above, backup control files will also be included as RMAN automatically includes the control file and the SPFILE in backups of data file 1.
  So in all cases when my control file is accidentally deleted from the server, I always can I restore from the backup right?
  I think I need set the db first as a control the file id is my deposit. If the control is absent, it can identify the control file for restore by setting db IDs?
  2. my automatic backup of control is set to off. What is the difference between the control file backup taken by autobackup compared to 1?
  understand controlfile autobackup is good because it will automatically backup if there is no change in the db (as new file created, etc.). Any other difference?
  3.
  Plateforme BACKUP CURRENT CONTROLFILE
  ❐ a control within a file backup by using the CONTROLFILE CURRENT INCLUDE of the BACKUP command
  What is the difference with this backup from controlfile backup to point 1 and 2?
  
  4. Finally, if my control + bow + datafiles, redo file is deleted by mistake at 18:00. I've restored the control taken to yesterday 20:00 file. The control file consisting only of 20:00 and before backup information, how to restore the rest of the newspapers arch taken by 07:00, 11:00, 16:00?
  
  
  
  Thank you

  Since you talk about networker, I presume that you are copying backups from disk to tape as a separate order of networker. Do not forget to include the controlfile record as well during the copy on tape!

  1. Yes, you can restore the controlfile and spfile from the backup. But you will need to manually determine what backup piece contains the backup controlfile and spfile. (In the scenario where you assume the controlfile is lost, you cannot issue a BACKUP LIST to identify the backuppieces, so you will have files from search logs to identify the backuppiece!)

  2. a controlfile autobackup will be created in db_recovery_file_dest using OMF. If you do not have it defined, the controlfile autobackup is epxected to go in $ORACLE_HOME/dbs - although the location of the actual target can be dependent on version and platform.

  3. a backup BACKUP CONTROLFILE creates a separate backupset and backuppiece for the controlfile. In OMF, it goes in the backup directory, not in the AutoSave directory.

  4. without a repository, if your archivelog backups are on the disc, you can catalog THEM (i.e. run 'CATALOGUE START WITH /disklocation' command) in the controlfile you restorted to the backup from 20:00. You cannot catalog backuppeices tape is advicable to use a repository when you back up directly to tape.

  Hemant K Collette

• How can I control a SWF via RF, ala Powerpoint remote control?

  I have a Mac laptop and a remote to RF Honeywell who will control Powerpoint presentations. I prefer to do presentations in Flash. The remote control has three functions: the last slide, next slide, and white screen. I don't have any idea of what remote control signals sent to Powerpoint to read, but it should be pretty standard.
  
  Did someone knows a way code Flash so that it will respond to these commands, the same as Powerpoint does... or is this a lost cause?
  
  Thank you!

  I thought about it. Just make an invisible button full screen and place it on a layer on every frame.

  For his Actions - button for frame 2:

  on {(keyPress "")
  Stop (3);
  }

  on {(keyPress "")
  Stop (2);
  }

  sends the show forward in the chassis (slide) 3 by pressing the button 'Next' on the remote control and it refers to the framework (slide) 1 by pressing the button "Back".

  I have a Stop action on each image.

  This allows me to control a Flash show as a Powerpoint slide show. Cool.

• control multiple instrument via one rs232 port

  How can I connect rs232 port unique to several temperature controller that has a different address for each. is this possible?

  moshez wrote:
  How can I connect rs232 port unique to several temperature controller that has a different address for each. is this possible?

  I did it with these. Knowing what the switch is in the on position is important in order to send the bit to the correct address. Difficult but doable.

• Remote control for computer via Internet

  I took away frequently to PC to work and even to my Office PC from home, but I did not now how remotely on a computer private on the internet.  I need to help a member of the family aged regularly and it would be the easiest way for me to do.  Can someone give me advice on how to do this?  The computer that I need distance is Vista and the user is not technically oriented in the slightest.  I'm running v7 House and have access to XP if necessary.

  You can use applications such as TeamViewer, ShowMyPC, Gotoassist etc.
  That it should help you.

• VI_ERROR_RSRC_BUSY on the serial port (ASRLx::INSTR)

  Hi all

  I'm programming NI VISA on Windows (XP 32 Bit: VISA 4.6 and Win7 64-bit.) 5.1 VISA the same behavior) with C++ to control R & S NRT - Z power with adapter series (NRT - Z3).

  The task is to break the communication on the ASRL Application1 session (complex, also controls other instruments via VISA-LAN-VX11), establish a session of Application2 (simple, only NRT - Z) and restore the session series in App1 App2 has been closed.

  As it is not possible to share open between applications under windows serial ports, I tried viClose on the ASRL session in App1, but that seems not to release the port series for any other application. A viClose on the session of ROM releases, however, the port. This is normal, or I'm doing something wrong (see I/O traces below)?

  Ist of problem that I can not close the other session manages the other instruments in App1.

  Any solution is very appreciated!

  Concerning

  Michael Heimann

  

  Hello P,

  a workaround solution was found with the help of the Germany OR. It's not enough to only close the instrument to the instrument session descriptor com closing also the Session Resource Manager handle also closes the underlying windows COM port. It is a bit disturbing and should be mentioned in the VISA documentation.

  Concerning

• Measure the resistance with PXI DMM 4072 on different frequencies

  Hi all

  I tried to get on board various and unable to find solutions for that. I'm trying to measure resistance using NI PXI-4072 on frequencey 1 kHz, but not luck. When I try to use Agilent LCR meter I see the correct value of the resistance.

  I've seen a few posts on this but don't have no satisfactory solutions.

  http://forums.NI.com/T5/Digital-Multimeters-DMMs-and/LCRmeter-test-frequency-for-resistance-measurem...

  In above post, someone said that I can use 4072 DMM OR digitizer, does not have a lot.

  Can someone please provide the right path for me to solve this problem.

  Thank you

  Hello Puneet_K,

  I checked the data sheet and the method of measurement described in the specifications of the NI 4070/4072 http://www.ni.com/pdf/manuals/371304g.pdf; indicates that the ability is measured using an alternating signal and select the test frequency range, for example 3 kHz, 1kH or 91 Hz. The resistance is simply measured using a DC signal, and it is often sufficient to measure the internal resistance of a battery. If you need a more flexible control for the measurement, you probably get a card like the function generator and then set a multimeter to measure the voltage and another DMM to measure the current and calculate the impedance of these values.

  I hope this helps!

  Kind regards

  -Natalia