Problems with write to measurement

My project group has some problems with the write to measurement VI.
Firstly, for each of the SOC/Voltage...each file only has one value, how to make all value inside one file?
Secondly,How to make all the different parameters, such as SOC1, SOC2, Voltage1, Voltage2, appear in one excel file for easier reference?
Attachments:
TwoBatteries.vi ‏246 KB

Look at your settings for the Write to Measurement File. You are telling it to save to one file, and then use next available filename. Try append to file.
Also, use Merge Signals to combine the 4 and write to a single Write to Measurement File. Right now you have 4 identical ones with the same file name. They are stepping all over each other.
When using the Write to Measurment File, try opening up the help file and reading it o understand what each setting does.

Similar Messages

Problem with Write To Measurement File Express VI not writing to file if file was deleted after the first call (7.1)

I'm using the Express Write to LabVIEW Measurement File in LV7.1.
I have it set to "Save to one file" and have tried both "Overwrite file" and "Using next available file name" for the "If a file already exists" conditions.
The path/filename is passed into the function.
It works fine the first time around. If the file is deleted before the function is called again, an error occurs since LV is unable to find the file.
I have had to stop and re-run my program in order to write to use the function again.
Since I am able to delete the file I assume it was closed but it seems like LV expects it to be there, even though the function was supposed to create/open/close the file... Is there any way to reset this without stopping/restarting the program?
Since my application creates several files (only one using the Express VI) I am checking for the filenames and requiring that they be deleted (or a new filename be used) before acquiring data. Everything has worked great, except for the Express VI.
Thank you,
David

Ok, I've edited the VI you posted to reproduce my error (this time with 8.0).
I added a "master stop" and "start log" button. To demonstrate my problem:
1. Run the VI
2. Click "START LOGGING" - c:\test.txt is created
3. Click "STOP" - c:\test.txt is closed
4. Delete the file c:\test.txt with Windows shell or explorer
5. Click "START LGGING" - a new c:\test.txt file should be created but instead an error is raised in the Write LabVIEW Measurement File function.
Any ideas?
Thanks,
Dave
Attachments:
Write LV Meas File 2.vi ‏96 KB

Problem with Unit of measurement

Hi,
I am having problem with Unit of measurement with different languages.
Eg:
In SPRO, I am able to see the unit of measure T3 Description: (Trading unit). in SAP 200 client .the logon language is EN(english).
But if I logon into same client(200) with different language DE(german) version, I am not able to see the description in German, the description field is blank.
Kindly give me a solution for this problem as it is very urgent.
Thanks in advance.
Regards,
Shankar

Hi Aishwarya,
I can think of 2 possibilities:
1. You need to verify passing the Target UoM with the ISO Code as well as the update flag in the 'X' structures.
2. The material that you are trying to pass some UoM does not have the conversion maintained in the Material Master. (Base UoM --> Target UoM conversion in Material Master, contact Functional Consultant).
Also, if you can verify by performing the action manually and check if the Sales Order is getting created manually with the Target UoM .
Regards,
Pranav.

Time with 'Write to measurement file'

Hello,
I am making an acquisition waveform. The integration time is 1s divided in 128 samples. When I execute the software, the datas are stored in a text file with 'Write to measurement file'. This text file is a continuous list of 128 numbers-packs in rows.
I want to add the time column (date+hour+minutes+secondes+1/10sec+1/100sec) in front of each number acquired. (And not only in front of the first number of the 128 package)
I have don t know how to add this.
Can you help me?
Thanks a lot.
(See file attached)
Attachments:
test3.vi ‏148 KB

Also, in the setup dialog for the Write Measurement File, there's an option to include an "X Column Value" that normally holds a timestamp.
Enable one of these options and any included timestamp in your waveform will go into this column. If you don't have a waveform, you can build an extra column in your array of data points with the needed timestamp and it will work the same.
Ed
Message Edited by Ed Dickens on 02-20-2007 03:37 PM
Ed Dickens - Certified LabVIEW Architect - DISTek Integration, Inc. - NI Certified Alliance Partner
Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences.
Attachments:
WLVMF Time Column.gif ‏9 KB

Calc problem with fact table measure used as part of bridge table model

Hi all,
I'm experiencing problems with the calculation of a fact table measure ever since I've used it as part of a calculation in a bridge table relationship.
In a fact table, PROJECT_FACT, I had a column (PROJECT_COST) whose default aggregate was SUM. Whenever PROJECT_COST was used with any dimension, the proper aggregation was done at the proper levels. But, not any longer. One of the relationships PROJECT_FACT has is with a dimension, called PROJECT.
PROJECT_FACT contains details of employees and each day they worked on a PROJECT_ID. So for a particular day, employee, Joe, might have a PROJECT_COST of $80 for PROJECT_ID 123, on the next day, Joe might have $40 in PROJECT_COST for the same project.
Dimension table, PROJECT, contains details of the project.
A new feature was added to the software - multiple customers can now be charged for a PROJECT, where as before, only one customer was charged.
This percentage charge break-down is in a new table - PROJECT_BRIDGE. PROJECT_BRIDGE has the PROJECT_ID, CUSTOMER_ID, BILL_PCT. BILL_PCT will always add up to 1.
So, the bridge table might look like...
PROJECT_ID CUSTOMER_ID BILL_PCT
123          100     .20
123          200     .30
123          300     .50
456 400 1.00
678 400 1.00
Where for project 123, is a breakdown for multiple customers (.20, .30. .50).
Let's say in PROJECT_FACT, if you were to sum up all PROJECT_COST for PROJECT_ID = 123, you get $1000.
Here are the steps I followed:
- In the Physical layer, PROJECT_FACT has a 1:M with PROJECT_BRIDGE as does PROJECT to PROJECT_BRIDGE (a 1:M).
PROJECT_FACT ===> PROJECT_BRIDGE <=== PROJECT
- In the Logical layer, PROJECT has a 1:M with PROJECT_FACT.
PROJECT ===> PROJECT_FACT
- The fact logical table source is mapped to the bridge table, PROJECT_BRIDGE, so now it has multiple tables it maps to (PROJECT_FACT & PROJECT_BRIDGE). They are set for an INNER join.
- I created a calculation measure, MULT_CUST_COST, using physical columns, that calculates the sum of the PROJECT_COST X the percentage amount in the bridge table. It looks like: SUM(PROJECT_FACT.PROJECT_COST * PROJECT_BRIDGE.BILL_PCT)
- I brought MULT_CUST_COST into the Presentation layer.
We still want the old PROJECT_COST around until it get's phased out, so it's in the Presentation layer as well.
Let's say I had a request with only PROJECT_ID, MULT_CUST_COST (the new calculation), and PROJECT_COST (the original). I'd expect:
PROJECT_ID MULT_CUST_COST PROJECT_COST
123          $1000     $1000
I am getting this for MULT_CUST_COST, however, for PROJECT_COST, it's tripling the value (possibly because there are 3 percent amounts?)...
PROJECT_ID MULT_CUST_COST PROJECT_COST
123          $1000 (correct)      $3000 (incorrect, it's been tripled)
If I were to look at the SQL, it would have:
          SELECT SUM(PROJECT_COST),
SUM(PROJECT_FACT.PROJECT_COST * PROJECT_BRIDGE.BILL_PCT),
               PROJECT_ID
          FROM ...
          GROUP BY PROJECT_ID
PROJECT_COST used to work correctly before modeling a bridge table.
Any ideas on what I did wrong?
Thanks!

Hi
Phew, what a long question!
If I understand correctly I think the problem lies with your old cost measure, or rather combining that with you new one in the same request. If you think about it, your query as explained above will bring back 3 rows from the database which is why your old cost measure is being multiplied. I suspect that if you took it out of the query, your bridge table would be working properly for the new measure alone?
I would consider migrating your historic data into the bridge table model so that you have a single type of query. For the historic data each would have a single row in the bridge with a 1.0 BILL_PCT.
Best of luck,
Paul
http://total-bi.com

Data format problem with Write to Spreedsheet File

I have a problem with the data format with Write to spredsheet file.
I have an N*3 array, where the 3 elements in each row should has different length. When I used Write to spreedsheet file,
it can only save the three data in one format. How can I save them in the format of "%0.8f %0.3f %0.2f"?
Thanks for your help.

Hi powerplay,
another solution may be to convert column-wise using "number to fractional string", then interleaving resulting arrays and again using "array to spreadsheet string" (with "space" as separator).
Many ways lead to Rome
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Problems with write to measurement file

My VI doesn't seem to write my signal properly when writing is enables.. however, if i change the "Write to measurement file" Express VI to a Write to Spreadsheet function, the signal is written correctly. From what I understand in previous discussions, there is a bug associated with enabling a write to measurement file, so is there a way to enable write to spreadsheet instead of using the express VI or is there a way I can bypass this bug?
Thanks,
TFlax
Attachments:
Analog test and collection.vi ‏700 KB

This is my second program ever written, first in matlab, so I am very new to the field. So why I choose one way over another I have no reasoning, all I know is that it works. I am collecting electromyography analog signals, with a range of +/-5V.. the "bad" writing with write to meas file is that I am getting a flat signal (range between -.01 to +0.01, give or take).. where when written with write to spreadsheet, the signal has proper voltage range and normal frquency and amplitude characteristics seen in EMGs.
I tried using a case structure for the write to spreadsheet, however it only writes the buffer size during continuous sampling. I need it to write the entire time the boolean (enable button) is true, also the enable button is operated as switch when pressed.
The discussion about the write to measurement file: http://forums.ni.com/ni/board/message?board.id=170&message.id=454380
Thanks again

Problems with write latency

Hi to all storage gurus,
One of our disk systems (HP EVA8000) has been quite busy lately. HP has
spent days analyzing the situation and the result of the analysis was
that the disk system is ok but there are occasionally up to 2000 ms
write latencies. According to them this is not out of ordinary and
operating systems should be able to handle the situation.
The problem is that Netware seems not always to be able to handle such
write latencies and the clustered services may go to comatose when the
write latency is so high. This does not happen on every such occasion,
but too often anyways. Netware is the only operating system which has
any problems with our EVA8000. In this particular EVA we we have roughly
200 hosts, out of which about 10% are Netware. Thus is seems rather
clear that something is wrong with our Netware setup or Netware itself,
we just dont have any clues what.
All servers have NW6.5 SP8, and HP supported Qlogic HBA's with latest HP
supported bios and drivers.
In our Startup.ncf we have:
set multi-path support=on
LOAD SCSIHD.CDM AEN TOFACTOR=5
LOAD QL2X00.HAM SLOT=201 /LUNS /ALLPATHS /PORTNAMES /MAXLUNS=12
/XRETRY=400 /XTIMEOUT=60 /BACKOFF
LOAD QL2X00.HAM SLOT=202 /LUNS /ALLPATHS /PORTNAMES /MAXLUNS=12
/XRETRY=400 /XTIMEOUT=60 /BACKOFF
The error messages are as follows:
18.06.2009 15.30.14 : COMN-3.27-34
Severity = 5 Locus = 2 Class = 6
NSS-2.70-5005: Volume KOTI12/USER2 user data write
(20204(zio.c[2301])) to block 122610663(file block 4810)(ZID
146302323) failed.
18.06.2009 15.30.15 : COMN-3.27-1092
Severity = 4 Locus = 3 Class = 0
NSS-3.00-5001: Pool KOTI12/SARKA is being deactivated.
An I/O error (20204(zio.c[2279])) at block 29505990(file block
104772)(ZID 3) has compromised pool integrity.
Any ideas what could be wrong?
Best regards,
Jonne Viljanen
University of Helsinki

Hi JJ,
Thanks for your insightful answer. We are using execution throttle 16 on
almost all hosts. However HP suggested to increase the execution
throttle on Netware hosts to 64, since their IO to disk system is very
small and thus increasing the value would not cause problems to other
hosts. Increasing the execution throttle did not solve our problems.
What value are you using for execution throttle?
Cheers,
JV
> Hi,
>
> We had some similar problems (many hosts on an EVA 8000) but only with a
> disk failure. A disk failure causes latency and thus resulting in node cast
> out, comatose services or dismounted volumes. And since a san is still is a
> shared disk system /EXECTHROTTLE might be something to look into. If a
> couple of hosts have the execution throttle set to high (like 256) then they
> will fil up the controllers queues first leaving no room for other hosts.
> We also we played around with the /XTIMEOUT parameter. but not as high as 60
> (ours is 8 on a 8 node cluster) because the cluster software also needs some
> time to make a good judgement.
>
> Cheers,
> JJ
> .
>
>
>
>
> "Jonne Viljanen" <jonne.viljanen@rmv_this.helsinki.fi> wrote in message
> news:[email protected]...
>> Hi to all storage gurus,
>>
>>
>> One of our disk systems (HP EVA8000) has been quite busy lately. HP has
>> spent days analyzing the situation and the result of the analysis was that
>> the disk system is ok but there are occasionally up to 2000 ms write
>> latencies. According to them this is not out of ordinary and operating
>> systems should be able to handle the situation.
>>
>> The problem is that Netware seems not always to be able to handle such
>> write latencies and the clustered services may go to comatose when the
>> write latency is so high. This does not happen on every such occasion, but
>> too often anyways. Netware is the only operating system which has any
>> problems with our EVA8000. In this particular EVA we we have roughly 200
>> hosts, out of which about 10% are Netware. Thus is seems rather clear that
>> something is wrong with our Netware setup or Netware itself, we just dont
>> have any clues what.
>>
>> All servers have NW6.5 SP8, and HP supported Qlogic HBA's with latest HP
>> supported bios and drivers.
>>
>> In our Startup.ncf we have:
>>
>> set multi-path support=on
>> LOAD SCSIHD.CDM AEN TOFACTOR=5
>> LOAD QL2X00.HAM SLOT=201 /LUNS /ALLPATHS /PORTNAMES /MAXLUNS=12
>> /XRETRY=400 /XTIMEOUT=60 /BACKOFF
>> LOAD QL2X00.HAM SLOT=202 /LUNS /ALLPATHS /PORTNAMES /MAXLUNS=12
>> /XRETRY=400 /XTIMEOUT=60 /BACKOFF
>>
>>
>> The error messages are as follows:
>>
>> 18.06.2009 15.30.14 : COMN-3.27-34
>> Severity = 5 Locus = 2 Class = 6
>> NSS-2.70-5005: Volume KOTI12/USER2 user data write
>> (20204(zio.c[2301])) to block 122610663(file block 4810)(ZID 146302323)
>> failed.
>>
>> 18.06.2009 15.30.15 : COMN-3.27-1092
>> Severity = 4 Locus = 3 Class = 0
>> NSS-3.00-5001: Pool KOTI12/SARKA is being deactivated.
>> An I/O error (20204(zio.c[2279])) at block 29505990(file block
>> 104772)(ZID 3) has compromised pool integrity.
>>
>>
>> Any ideas what could be wrong?
>>
>>
>> Best regards,
>>
>> Jonne Viljanen
>> University of Helsinki
>
>

Problem with Writer.flush() appending extra character

I have written a simple file copy that does the following:
     public static void copy(File source, File dest) throws IOException
          FileReader fr = new FileReader(source);
          FileWriter fw = new FileWriter(dest);
          try
               char[] ch = new char[(int)source.length()];
               fr.read(ch);
               fw.write(ch);
          finally
               fr.close();
               fw.close();
It works fine, and has done for some time.
For some reason, in a recent data collection, I have 3 files out of about a hundred, where the following behaviour occurs.
The char array is written to the file fine. For some reason when fw.flush() is called (i have tested this and confirmed that it is the call to flush() that is causing it) it appends a char to the end of the file with a value of -1.
This is causing merry havoc with my XML parser.
Can anybody tell me how to stop Writer from adding a -1 to my file?
This is on java 1.4.2 currently.

               char[] ch = new char[(int)source.length()];File.length() returns the number of bytes in the file.
However, you're loading that file via a Reader, which converts those bytes into characters using some encoding method. Depending on the encoding, the number of characters produced may be completely different from the number of bytes read. It's also possible that the bytes read are not valid with the encoding.
If you're just copying files, use FileInputStream and FileOutputStream. Better, download the Jakarta Commons IO library, and use their already-tested methods.
If you're working with a JAXP XML parser (ie, what comes with JDK 1.4 and above), create your InputSource from a FileInputStream. That will let the XML parser use the encoding specified in the file, ignoring whatever your JRE's default encoding is.
If you're planning to work with the raw text, then you're going to have to learn about character encodings. I don't have a tutorial link handy, so either Google for one or start with the documentation for java.nio.charset.Charset.

Problem with write a table to excel

I want to open an existing Excel-file from Labview with ActiveX.
I have used the Example "write table XL.vi"
I changed the code that I can open the existing file but I am unable to
select a different sheet in Excel.There is always the first sheet active
and I cannot change this.
Can anybody help me?
robert
Sent via Deja.com http://www.deja.com/
Before you buy.

wrote in message
news:8q4e0a$hsa$[email protected]..
> I want to open an existing Excel-file from Labview with ActiveX.
> I have used the Example "write table XL.vi"
> I changed the code that I can open the existing file but I am unable to
> select a different sheet in Excel.There is always the first sheet active
> and I cannot change this.
> Can anybody help me?
The workbook object has a "Sheets" property that returns a collection of all
the sheets in the active workbook. Use the "Item" method on this collection
to select the sheet you want- if necessary by cycling through all the
elements (use the "Count" property to find how many objects there are) and
using the "Name" property to get the name of the worksheet for comparison
with the one
you're looking for. Remember that everything is case sensitive.

Problem with write key VIs (config-file)

Hi
My problem is this: when I use the write key VIs to write to an ini-file, the values are not written/updated in the ini-file. Does
anybody has a solution???
thank YOU!!!
Attachments:
writetest.vi ‏32 KB

astroboy wrote:
Hi Dennis, writing key updates or add lines, but the problem is that it also causes all lines to be clumped together, making it unreadable.
What's the better way?
Clement
I was complaining about the poor formatting of the .ini files myself a couple years ago in this thread. http://forums.ni.com/ni/board/message?board.id=170&message.id=273552
I found the offending piece of code was buried pretty deep in the Config File VI hierarchy.
One idea is to go back after the file is written and find where all the section headers are and insert your own blank lines.
Also look at this thread http://forums.ni.com/ni/board/message?board.id=170&view=by_date_ascending&message.id=408776
You may also want to add kudoes to the config file idea in the Idea board. http://forums.ni.com/t5/LabVIEW-Idea-Exchange/Comments-in-configuration-file-ini/idi-p/927874#A614
Message Edited by Ravens Fan on 09-17-2009 10:29 PM

Problem with Write Statement

Hi Friends,
Select * from ekko into table i_ekko up to 100 rows.
loop at i_ekko into w_ekko.
write : w_ekko.
endloop.
when i write the above code i am getting an error "cannot be converted in to charater type".
but i want to display the all the coloums and rows from the DB table in the report.
regards
kumar m

hi,
loop at i_ekko into w_ekko
Here w_ekko is considered as the field string which cannot be written with name with reference of the field name.
You shold try this
loop at i_ekko into w_ekko.
write : w_ekko-filed1.
endloop
This will work.
Regards
Sumit Agarwal

Output problem with write() function.

Hi there
This program produced the output only when i add "System.out.write('\n')",
WHY?
import java.io.*;
class WriteBytes
public static void main(String[] args) throws IOException
byte[] b = {'T','e','s','t'};
for(int i = 0; i < b.length; i++)
System.out.write(b);
System.out.write('\n'); // Why if i comment this line then, don't get the output.

Your program is finishing before the buffer has a chance to flush. The newline character is forcing a flush to the print output. You could use System.out.println() to force the newline or System.out.flush() would work as well.

Problem With Write-On Effect

Hi. Help.
I want to use the Write-On effect to animation some script text.
I use the Pen Tool to draw the mask. I Copy the Mask Path, apply the Write On Effect, then I Paste the Mask Path to the Write On's Brusk Position.
The Brush Position keeps winding up to the left of the original path, and a little upwards. The Brush Position is off the Comp, and it seems to animate correctl, just in the wrong place.
I have tried this more than once. What am I doing wrong?
(This is CS3, by the way.)

There are several ways.
One, first paste the mask in a solid which is comp size, and free transform the mask (not the transform properties for tha layer) until it has the same size and location as the original, then copy the mask path and paste into Write-on's Brush Position. Of course, make sure the solid you're using for Write-On is comp size (Set Write-On's Paint Syle menu as "On transparent", so that it composites over layers below).

Old problem with precision time counting and /usepmtimer solution.

Hello, all!
There was a problem in Windows XP and 2003 Server with using QueryPerformanceCouner() function. Sometimes it can cause problem with precision time measurements on CPUs which support powersaving modes by changing clock frequency. The simplest solution for that was /usepmtimer key in boot.ini file which forces the system to use another timer.
I just want to know does this problem appear in Windoes 7? And how to solve it since there is no boot.ini file in Windows 7?
Thanks a lot!
P.S. This is a page with detailed description of the problem:
http://support.microsoft.com/default.aspx/kb/895980

Hi ,
There is official documentation released on userpmtimer for windows 7 operating system.
Also the KB article only refere to the OS which have performance problem.
After reading the below article , i feel that this problem is taken care in windows 7 / windows 2008 ( though there is no formal written documentation )
http://blogs.technet.com/perfguru/archive/2008/02/18/explanation-for-the-usepmtimer-switch-in-the-boot-ini.aspx
you can post in windows 7 dedicated forum, so that MVP / Microsoft Engineers and community members would suggest you with latest data if any.
http://social.technet.microsoft.com/Forums/en-US/category/w7itpro

Problems with write to measurement

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