How to configure the outputs voltage NI 9477

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• How to control the output voltage?

  Good time after some time can get the output voltage, but this value is alwayscontinuous. How to control the voltage output through a Boolean? In

  in order to get this tension when I want to.

  Greetings.
  Hugo Santos

  Hi Hugo,.

  If you use a LabVIEW project, you must set the time of sampling in the properties of the node (see SamplingInterval.png). But this time to refresh the data should be high enough. If you take into account this update of time trying to control your way out.

  Kind regards

• How the output voltage is coded on 16 bits DAQmx devices?

  In our laboratory, we have two devices DAQmx, the NOR-PCIe-6363 and the NOR-PCI-6733. Both have 16-bit for bipolar analog output precision. I understand that the small voltage difference that can be made is 2 * Vref/2 ^ 16, where Vref is the reference AO voltage (10 Volts or externally provided for 6733, 10 or 5 Volts or externally supplied for the 6363).

  I wanted to know how the output voltage is coded. DAQmx functions take 64 bit floats as input, and at some point, they must have their reduced accuracy. How is this done rounding, is a floating point around the nearest possible tension, or is always rounded down or always rounded upward?

  What is all the possible output voltages? Some diagrams in NOR-DAQmx help/measurement Fundamentals, signals, Analog, sampling considerations seem like they could involve the maximum voltage + Vref is not achievable, so I think that is all of the possible tensions - Vref + 2 * Vref * n/2 ^ 16, with n ranging from 0 to 2 ^ 16-1 included. This includes - Vref and does not zero but + Vref.

  Could I get confirmation on this point, or be corrected if it is wrong?

  Hi Chris,

  The scale of writing DAQmx version performs double floating precision scaling and then he made a turn, the closest to convert the resulting code of the DAC to double int16_t (or uint16_t for unipolar devices). Floating point scale includes the custom scale AO if you have configured one, the conversion of volts or AMPS to the codes of the DAC and for some devices, the calibration scale.

  You can check the coefficients of scaling using the AO. Property of DevScalingCoeff. It takes V / A-> CAD codes and scaling into account calibration, but not the scales to customized AO.

  The PCIe-6363 X series devices preset scaling in software. The internal reference of the AO is slightly higher than 10V, to correct the errors of gain and offset does not limit the output range. It also means that you are not limited to 9.9997 V on this device when you are using an internal reference.

  The PCI-6733 uses calibration DAC instead of software scaling. RAW - 32768 means - 10 V, 0 corresponds to 0 V, 32768 is impossible because of two of the 16 bits of the add-in and 32767 translates 9.9997 V. When you continue 10 V to write DAQmx with this device, DAQmx he forced into 9.9997 V.

  Note that for these two devices, the absolute accuracy full scale includes over 305 uV of error. Look at the tables of absolute precision AO in the specs of the device for the full story.

  Brad

• How to clear the output buffer, possibly resize and burn again, before you begin the task of output

  I use PyDAQmx with a USB-6363, but I think the question is generic to DAQmx.

  I have an output buffer that I want to be able to (re) write to without starting the task output.

  More specifically, I have a graphical interface and a few sliders, the user can move.  Whenever the slider changes, a new set of values is loaded into the buffer output through DAQmxWriteAnalogF64.  After you set the value, the user can click on a button and start the task output.

  In some cases the change in cursor does not require a change in buffer size, only a change in the data.  In this case, I get the compalint following DAQmx as they tried writing:

  The generation is not yet started, and not enough space is available in the buffer.

  Set a larger buffer, or start the generation before writing data more than content in the buffer.
  Property: DAQmx_Write_RelativeTo
  Value: DAQmx_Val_CurrWritePos
  Property: DAQmx_Write_Offset
  Corresponding value: 0
  Property: DAQmx_Buf_Output_BufSize
  Corresponding value: 92

  In other cases the change in cursor requires both change in the size of the buffer and data modification.  In this case, I get the following, but only after that do a few times each time increase the size of the writing.

  DAQmx writing failed because a previous writing DAQmx configured automatically the size of output buffer. The size of the buffer is equal the number of samples written by channel, so no additional data can be written before the original task.

  Start the generation of before the second writing DAQmx or set true in all instances of writing DAQmx Auto Start. To gradually write to the buffer before starting the task, call DAQmx Configure an output buffer before the first writing DAQmx.
  Task name: _unnamedTask<0>

  State code:-200547
  function DAQmxWriteAnalogF64

  I tried to configure the output via DAQmxCfgOutputBuffer buffer (in some cases, by setting it to zero or a samples, then save again, in an attempt to clear it) but that doesn't seem to do the trick.

  Of course, I can work around the problem by loading data only when the user clicks the end button, but not what I'm asking here.

  Is it possible to "remake" the writing of output before you begin the task?

  Thank you

  Michael

  Today I have no material practical to validate, but try unreserving task before writing the new buffer:

  DAQmxTaskControl (taskHandle, DAQmx_Val_Task_Unreserve);

  With a simulated device, he made the error go away in case the buffer is the same size.  You will need to validate if the data are in fact correct, but I think it should be (unreserving I would say reset the write pointer so the old buffer are replaced with the new data).

  I always get errors when you try to change the size of buffer if (on my 6351 simulated).  I posted some similar mistakes about the reconfiguration of the tasks here, I guess it is possible that this issue has also been set at 9.8 (I always use 9.7.5 on this computer).  If the behavior is still present in the new driver, and also appears on real hardware (not just simulated), then it seems that this is a bug of DAQmx someone at OR should be considered.

  I wrote a simple LabVIEW VI that captures the error in order to help people to NOT reproduce it:

  

  The best solution at the moment would be likely to re-create the task if you need to change the size of the buffer (or avoid writing data until you are sure what will be the size of buffer).

  Best regards

• How to configure the LDAP connector in windows server 2012 R2 Active Directory?

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  Please post your question in Server TechNet Forums.

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• Can someone give an example of how to configure the subnet mask associated with the network and host of an IP address part?

  Can someone give an example of how to configure the subnet mask associated with the network and host of an IP address part?

  Hi stuckfree,

  The question you posted would be more appropriate on the TechNet Forums. I would recommend posting your request here.

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• How to configure the router Linksys DD - WRT for WVC54GCA E4200

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  I followed the TZO supporter last night. I can watch my WVC54GCA outside. All solution links:

  http://tzodns.com/support/tutorials/188

  http://tzodns.com/support/tutorials/190

  Hi Majekho,

  Your domain name has decided to 99.245.xx.x. If you go to www.test.tzo.com from the location of the host, you must see this IP address. If these numbers are the same, then all with TZO works correctly. I guess that it is a simple problem with ports (80, 1024) is not open in the router and forwarded to the right internal IP address of the device (for example. 192.168.1.xxx).

  In addition, if you have a DSL, you will need to call your ISP and ask them to show you how to put your modem in "bridge mode". This will disable the firewall in the modem that blocks incoming connections even if you open ports in your router.
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  If you try to configure the browser by using the IP address of the printer, he asks as the SMTP server. The MS Outlook 2010 all our emails use mail.junior - albania.org incoming mail server and outgoing.  Other settings in MS Outlook 2010 are box My outgoing server (SMTP) requires authentication checked and use the same settings as my mail server entering selected.  On the Advanced tab: incoming server (Pop3): 110 (SSL encryption is not checked) and outgoing (SMTP) server: 465 use the type of encrypted connection (SSL) following.

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  Windows XP e-mail program called Outlook Express.

  Outlook is a part of the office.

  Windows Mail in Vista is the replacement of e-mail for Outlook Express (XP) program.

  Read this section on how to set up Windows Mail in Vista:

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  Link above has an easy to follow Guide to set up Windows Mail.

  Contact your ISP (Internet Service Provider).

  They offer your broad band/Dial-up connection.

  Ask them to:

  username
  password for your service account to wide band/Dial-Up with them

  Server of incoming POP3 mail
  outgoing mail SMTP server

  The above information is required to set up Windows Mail.

  ISPS are usually happy to help you set up your email account.

  See you soon.

  Mick Murphy - Microsoft partner

• My IP security camera is different my network ip address, how to configure the camera to match the ip address with the router cable time Wörner

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