How to write table values to analog channel?

Similar Questions

• How to write decimal values to hex bytearray?

  Hello

  To order liighting of flash, I need to send binary a usb dongle data. The pakkage the dongle to receive looks lik this:

  7th 06 02 01 FF 00 FF 00... E7

  the first value is the start bit

  shild and third some info length

  4th is the label

  then we can send 512 bits (channels) from 0 to 255 Dmx value

  at the end one stop bit.

  So what I want is to write the values of the different channels in the device. First of all, I have to go to decimal to hexadecimal values by using the following code.

  function decimalToHex($decimal:int,_$padding:int_=_2):String {}

  var hex: String = Number ($decimal) m:System.NET.SocketAddress.ToString (16);

  While (hex.length < $padding)

  {

  Hex = '0' + hex;

  }

  Return hex.toUpperCase ();

  }

  Decimal var: int = 163;

  trace ("decimal:" + comma);

  var hex: String = decimalToHex (decimal, 2);

  trace ("hex:" + hex);

  It gives me hexadecimal values as in the example package.

  Now, I want to write this in a bytearray. I found this:

  var len:uint = 512;

  var outputByteArr:ByteArray = new ByteArray();

  outputByteArr.length = len;

  for (var i: int = 0; i < len; i ++) {}

  outputByteArr.writeByte (hex);

  }

  trace (outputByteArr);

  But it gives an error indicating that the writing. Byte needs to a number, not a string.

  When I change to:

  outputByteArr.writeByte (0xff);

  for example, it does not.

  Does anyone know how to properly change the decimal values that I can put in the Bytearray?

  Thanks in advance!

  Greetings,

  Piet

  You can use the writeMultiByte() method to write a string.

• How to view analog channels during an ongoing acquisition, what type of used wave form, table, or chart?

  I use Labview 8.5. and the NI USB-6210 device.

  I want to display the analog channels over the continuous acquisition.

  I can use the table of waveform or waveform graph. Waveform allows you to eat a history buffer. This function is very interresting and useful for my system, but I can't change this value to programming (if I do not mistake!). So, I was wondering if I can also use the waveform graph, but I do not have how to make a circular buffer to replace function "history buffer. I have to use the waveform as a data type.

  What is the best solution for my problem? I would like to know if my solution is good (graphic use of waveform) and if anyone has a solution to make an effective circular buffer with the waveform data type?

  Thanks in advance, best regards, Daniel

  There is an example that comes with LabVIEW called "XY table". It shows you how to create a history for a XY Chart buffer. The size of the history can be changed on the fly. You can adapt the VI "graphic buffer XY ' to work with a data type of waveform." This type of data consists of 3 elements: start on time, delta t and table of values. The only thing that you should be buffering is the array of values.

• How to write a table and a scalar value in file?

  I would like to write my data in a file but cannot address the problem. In the file I would write are values of x and y of my points of data in two columns, however, the data is in a table and the data of x consists of 3 pieces of information: an initial x, x incremented value and the number of points in my sample of data. How would I go about this?

  The number of points is redundant, because it will be the same as the 'other' in the table.

  Here's what I usually do:

  

• How to determine the number of highlight ' to write ' for DAQmx generate analog output?

  On the configuration of the stage for DAQmx generate analog output, there is a field "value to write.  I can't find any explanation for what it is, how it determines the value to enter, nor what he writes.  I am trying to go through the tutorials and it cling.

  Someone would give an explanation?

  Hello

  To write value specifies the value to write in the channels, lines or ports selected in string parameters. In other words, this value will be the value of your DC output (for example if you enter 5, your output will be 5V). To get information on different fields in SignalExpress, access help"context-sensitive help. A pane will appear in your work environment that displays the coordinates of the field when you place your pointer over them.

  For new users of SignalExpress:

  Generation of DC signals with NI DAQmx devices: step in the DAQmx build, select 1 sample (on request) in the generation Mode dropdown. You can select a programmatic input to generate, or you can remove the check mark from the check box use programmatic input and specify a value for generating in the field of value to write . NOR-DAQmx help also provides additional information about the data generation.

  Best regards

  M Ali

  Technical sales engineer

  National Instruments

• Write to digitall all ports (channels) with the decimal value

  Hello

  It is possible to write all digital channels with a value decimal for a device with 96 channels at the same time?

  I have a USB-6509 camera and I want to write each value of Pentecost bit 1 in the loop (for the first transfer I write 0,1,2,4,8,16, 32, 64 and 128) with the line "Dev3/port0 / line0:7", but if I want to write all ports at the same time, how to set the line and the "write.vi DAQmx?

  Thank you.

  You can configure the reading and writing in the ports of 8 bits with the 6509.  For example, you could write just 128 to "Dev3/port0.  If you want to write to all 12 ports, I recommend doing a task that is several channels on the 6509 module, each channel of the task being a port.  You can then use the channel Multiple, single sample of writing of your values.  Your values must be in a table of U8.

• using the function - how to use the values of the input variables on the table select statement names

  Hello community, I have a problem when creating a function. The purpose of this function is to check the table of weather gave yesterday or not. We must check this on different tables on different sachems. We are creating a function with input variables.

  CREATE OR REPLACE FUNCTION IN_SCHEMA.IS_YDAYDATA_TO_TABLE

  (

  in_schema IN VARCHAR2,

  in_tablename IN VARCHAR2,

  in_datefield IN VARCHAR2,

  )

  RETURNS INTEGER

  AS

  -Declaring variables

  v_is_true INTEGER.

  BEGIN

  SELECT

  CASE

  WHEN MAX (in_datefield) = TRUNC(SYSDATE-1)

  THEN 1

  ON THE OTHER

  0

  END

  IN

  v_is_true

  Of

  in_schema.in_tablename

  ;

  RETURN v_is_true;

  END;

  /

  When creating, I got error: [error] ORA-00942 (44:19): PL/SQL: ORA-00942: table or view does not exist

  How to use the values of the input variables on the table select statement names?

  Hello

  Here's a way you can use dynamic SQL statements for this task:

  CREATE OR REPLACE FUNCTION IS_YDAYDATA_TO_TABLE

  (

  in_schema IN VARCHAR2,

  in_tablename IN VARCHAR2,

  in_datefield IN VARCHAR2,

  in_first_date DATE DEFAULT SYSDATE - 1,.

  in_last_date DATE by DEFAULT NULL

  )

  RETURNS INTEGER

  AS

  -IS_YDAYDATA_TO_TABLE returns 1 if in_schema.in_tablename.in_datefield

  -contains all the dates in the in_first_date of the range through included in_last_date

  - and it returns 0 if there is no such lines.

  -If in_last_date is omitted, the search only the data on in_first_date.

  -If in_first_date is omitted, it defaults to yesterday.

  -Time parts of the in_first_date and in_last_date are ignored.

  -Declaring variables

  sql_txt VARCHAR2 (1000);

  v_is_true INTEGER.

  BEGIN

  sql_txt: = 'SELECT COUNT (*).

  || 'FROM ' | in_schema | '.' || in_tablename

  || 'WHERE ' | in_datefield | ' > =: d1'

  || «AND» | in_datefield | '< >

  || 'AND ROWNUM = 1';

  dbms_output.put_line (sql_txt |) '= sql_txt in IS_YDAYDATA_TO_TABLE");  -For debugging

  Sql_txt EXECUTE IMMEDIATE

  IN v_is_true

  With the HELP of TRUNC (in_first_date) - d1

  TRUNC (NVL (in_last_date

  in_first_date

  )

  ) + 1                -- d2

  ;

  RETURN v_is_true;

  END is_ydaydata_to_table;

  /

  DISPLAY ERRORS

  If you must use dynamic SQL statements, put all the SQL statement in a single string variable, such as sql_txt in the example above.  In this way, you can easily see exactly what will be executed.  Comment out the call to dbms_output under test is completed.

  Try to write functions that will address not only the question that you have now, but similar questions that you may have in the future.  For example, now that interest you only to the verification of the data of yesterday, but later, you might want to check another day or range of days.  The above function combines the convenience of a function simple (looks like yesterday data if you don't tell him otherwise) with the power of a more complex function (you can use the same function to check any day or range of days).

• How to use DAQmx Read to measure several analog channels

  I have two analog inputs using USB 6221 and I want to measure the voltage of each of them.  I use vi DAQmx-read and I select input analog, 1 sample, several channels, but I do not know how to connect several channels at the entrance of the physical channel.

  Hello, Bernadette.

  For reference - I would recommend ad DAQmx questions here:

  NEITHER Forums: Multifunction Data Acquisition

  http://forums.NI.com/T5/Multifunction-DAQ/BD-p/250

  There are several ways to add multiple channels for a fast task-ni.com look for "select multiple channels DAQmx" gives me this like the hit albums:

  2X8D7F5Z knowledge base: How can I select more than one channel of NOR-DAQmx LabVIEW?

  http://digital.NI.com/public.nsf/allkb/A3A05920BF915F1486256D210069BE49

  Hope that helps!

• How to find the value max and min for each column in a table 2d?

  How to find the value max and min for each column in a table 2d?

  For example, in the table max/min for the first three columns would be 45/23, 14/10, 80/67.

  Thank you

  Chuck,

  With color on your bars, you should have enough experience to understand this.

  You're a loop in the table already.  Now you just need a function like table Max and min. loop.  And you may need to transpose the table 2D.

• How to write a single value in an excel spreadsheet

  Hello

  I use an excel spreadsheet, as if it were an external code module. He does a lot of calculations, all I do is write an individual value, let calculate what it should only then read a return value from this.

  I already have a structure able to read a table, but could someone help me with a piece of code that could write a single value?

  (To read a value unique too may be practical)

  Also, I have the new LabVIEW 2009, so while a fancy to drop some code here as one. PNG, it would be nice to see if this new feature works!

  Thank you, Alec

  Try this. There are 2 point methos (get) and point (put) to read and write the value respectively to a cell in excel.

  Good luck

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  Narendra.

  Narendra,

  Two characters can type cast into a uint16 you VI supports.

  To summarize. Take one (4 bytes). Flatten it to a string (4-byte) divided this string into two parts of 2 bytes each. Cast in u16 (16 x 2 = 32-bit).

  However, if you really want to follow the IEEE standards then you will need refer this KB. His is not that simple, but seems closer to what you are looking for.

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  Mr President.

  How to add a transient attribute of a table values in the new attribute group wise transient that is to say wise customer?

  as below

  

  Concerning

  Hello world

  for an overview in the following form

  

  This is the sql query that reach this format

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• How to write the condition with the value of the parameter

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  If the parameter exists then MODEL of APPEAL one another do not call MODEL A
  
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• How to find this value in the oracle database to find out the table

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  I know there is a value in the oracle database, please show me how to find this value in the oracle database to find out the table that contains this value.
  
  Thank you very much

  918440 wrote:
  Hi expert,

  I know there is a value in the oracle database, please show me how to find this value in the oracle database to find out the table that contains this value.

  Thank you very much

  Go to the online documentation and discover the data dictionary. You may be interested in reading about ALL_TAB_COLUMNS, but you will need to know what you want until you can query the view to find information

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  Published by: surya on 6 March 2012 10:20

  Hi Surya,
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