Please help me assign channel names
Hi Im trying to log select data when any of 24 signals rises above 5 V which I have done with Greater or Equal Express VI. I'm having a hard time getting this data to my file via Write to Measurement File. A waveform plot that I have connected to this signal has no problem extracting the channel names from the signal. However they aren't as easy to get into my data file. I have been searching quite a bit and I know I need to convert to array to get names then back to dynamic for the file making. I'm not having any luck with this approach. I have quite a few dummy channels involved and I thought about extracting channel names from mx, but obviously I'm only interested in the selected signals of specific channels that have specific voltages.
Thanks.
Attachments:
need help channel names.png 32 KB
Hi nwiman,
I looked a little into your code and I want to point a few things out to you. I think you now have the Write to Measurement File almost worked out correctly. Firstly, I want to let you know you are using a DAQmx task, and because we don't have you MAX configuration, we don't know what that is. I chose to simulate a USB-6351 to get some analog inputs, it is titled Dev1 in my MAX. Also, to avoid a buffer overflow error from DAQmx while it is waiting for the user to determine the file path, I used a File Dialog express VI to get the path before the While Loop starts. Lastly I unchecked "Ask user to chose file" in the properties of Write to Measurement File and chose "append to file. I also want to point out that your code has Tab constants, but the Write to Measurement file is set up for Comma delimited. To show you the functionality of the write to measurement file, I wired the signal after the DAQmx read to the write to Measurement File, and it works how I think you would expect it to. I recommend using charts for your output signals and when they look like you would expect them, wire them into Write to Measurement File.
To run the snippet I have attached, you must simulate a USB-6351 in MAX. Follow this link to add the simulated device to MAX, once it is in MAX you should not need to create a task or anything, just make sure it is named "Dev1".
Regards,
Chris
National Instruments
Applications Engineer
Attachments:
modified.png 555 KB
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Please help me a bit.
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Help, Ni-Daq channel names and labview program error 10001?
Can anyone please help me, I have inherited a role that I know nothing about. I have managed to get an NT pc to now recognise the SC-2345 board, set up and configure two channels and test them in Measurement and Automation program, this I managed after getting error 10401 and looking within these message boards which are very good.
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error 10001 can be caused by a few things including an incorrect scanning order.
If you'd like to post your code back onto here (or if it's large, ftp it to ftp.ni.com/incoming and let use know the name of the zip file you've packaged it into), then we can see what the DAQ section is supposed to be doing and hopefully provide some clues as to where to look for the information / why the error is occuring.
The first thing to do is go back to Measurement and Automation explorer and try setting up a global task that refers to the channels you're interested in.
This removes the programming side of things, since you select from drop down lists, to verify that you can communicate correctly with the hardware at the rates and across the channels that you want.
These links is going to be your best learning point for getting up an running with the program.
http://digital.ni.com/public.nsf/allkb/DD52ABD7C15F0B15862562910074F09E
http://zone.ni.com/devzone/cda/tut/p/id/3116
http://zone.ni.com/devzone/cda/tut/p/id/4656
In terms of LabVIEW, there's several I/O controls you can use which will list the hardware channels you have configured or the global tasks you have created in Measurement and Automation explorer. (see the last link above)
Another option is to look at our Alliance Partners if you need things configured and up and running in a hurry.
http://www.ni.com/alliance
If you just need a little pointer on getting kicked off, then you could see if you local sales engineer is available to go through things with you for an hour if they're in your area at a convenient time (for the UK / Ireland, please call in on 01635 572410 and ask to go through to sales), or we do offer start-up assistance (but that's something you need to purchase) to get a day's onsite assistance with getting your hardware up and running and starting you off with advice / examples on your application (note this is an effort based thing rather than a results based guarantee)
Finally you could consider coming on one of our courses on LabVIEW and / or Data Acquisition to learn more about the software / hardware and be better prepared to handle the implementation yourself.
Hope that helps
Sacha Emery
National Instruments (UK)
Message Edited by SachaE on 03-23-2007 11:49 AM
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version 11g
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ID LAST_NAME FIRST_NAME MIDDLE_NAME
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select substr(d.name,1,14) "dist",
sum(r.room_net_sq_foot) "nsf",
sum(r.student_station_count) "sta",
sum(distinct(r.cofte)) "fte"
from b_fish_report r,
g_efis_organization d
where substr(r.organization_code,-2,2) = substr(d.code,-2,2) and
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Thanks
Asma.Asma,
I tried your SQL on my tables T1 and T2. Indexes are on C1,C2,C3 and N1,N2,N3. The data in T1 and T2 are shown below with the explain plan (also called EP) listed. You really need to do an explain plan (free TOAD is easiest to do this in) and respond showing your EP results.
By simply changing the optimizer mode to RULE I was able to get it to use indexes on both T1 and T2.
T1 data
C1 C2 C3 N1 N2
001 Y AAA 1 11
002 Y BBB 2 22
003 Y CCC 3 33
111 N DDD 4 44
222 N EEE 5 55
333 Y FFF 6 66
070 Y GGG 7 77
071 N HHH 8 88
072 Y III 9 99
TEST TEST TEST 10 100
T2 data
C1 C2 C3 N1 N2
001 CNTY AAA 1 11
002 CNTY BBB 2 22
003 CNTY CCC 3 33
111 XXX DDD 4 44
222 XXX EEE 5 55
333 CNTY FFF 6 66
070 CNTY GGG 7 77
071 XXX HHH 8 88
072 CNTY III 9 99
TEST TEST TEST 10 100
This is the results when I run the SQL based on this data ...
dist nsf sta fte
AAA 1 11 10
BBB 2 22 20
CCC 3 33 30
FFF 6 66 60
GGG 7 77 70
III 9 99 90
--[SQL 1] : with CHOOSE as the optimizer mode, which is normally the DEFAULT if no hint is specified
select /*+ CHOOSE */
substr(d.c3,1,14) "dist",
sum(r.n1) "nsf",
sum(r.n2) "sta",
sum(distinct(r.n3)) "fte"
from t1 r, t2 d
where substr(r.c1,-2,2) = substr(d.c1,-2,2) and
d.c2 = 'CNTY' and
r.c2 = 'Y' and
substr(d.c1,-2,2) between '01' and '72'
group by d.c3, r.c1
order by d.c3
This is what the EP shows for your SQL (which will probably be the same for you once you do an EP on your actuall sql) ...
SELECT STATEMENT Optimizer=CHOOSE (Cost=4 Card=1 Bytes=37)
SORT (GROUP BY) (Cost=4 Card=1 Bytes=37)
NESTED LOOPS (Cost=2 Card=1 Bytes=37)
TABLE ACCESS (FULL) OF T1 (Cost=1 Card=1 Bytes=12)
TABLE ACCESS (BY INDEX ROWID) OF T2 (Cost=1 Card=1 Bytes=25)
INDEX (RANGE SCAN) OF I_NU_T2_C2 (NON-UNIQUE)
Notice the FULL table scan of T1 which you don't want, and neither C1 index is getting used (I've explained why below).
--[SQL 2] : only changed the hint to RULE ...
select /*+ RULE */
substr(d.c3,1,14) "dist",
sum(r.n1) "nsf",
sum(r.n2) "sta",
sum(distinct(r.n3)) "fte"
from t1 r, t2 d
where substr(r.c1,-2,2) = substr(d.c1,-2,2) and
d.c2 = 'CNTY' and
r.c2 = 'Y' and
substr(d.c1,-2,2) between '01' and '72'
group by d.c3, r.c1
order by d.c3
SELECT STATEMENT Optimizer=HINT: RULE
SORT (GROUP BY)
NESTED LOOPS
TABLE ACCESS (BY INDEX ROWID) OF T2
INDEX (RANGE SCAN) OF I_NU_T2_C2 (NON-UNIQUE)
TABLE ACCESS (BY INDEX ROWID) OF T1
INDEX (RANGE SCAN) OF I_NU_T1_C2 (NON-UNIQUE)
Though the C2 index is getting used (your r.c2 = 'Y' part in the where clause) the main problem your having here is the JOIN column (C1 in both tables) is not getting used. So the join you have ...
where substr(r.c1,-2,2) = substr(d.c1,-2,2)
isn't using an index and you want it too. There are 2 solutions to correct this..
Solution #1
The first is to make a function-based index for data. Since your doing SUBSTR on C1 that C1 index does not contain that partial information so it will not use it. Below is the syntax to make a function based index for this partial data ...
CREATE INDEX I_NU_T1_C1_SUBSTR ON T1 (SUBSTR(C1,-2,2));
CREATE INDEX I_NU_T2_C1_SUBSTR ON T2 (SUBSTR(C1,-2,2));
or also this way if it's still not using the above indexes ...
CREATE INDEX I_NU_T1_C1_SUBSTR ON T1 (SUBSTR(C1,-2,2),C1);
CREATE INDEX I_NU_T2_C1_SUBSTR ON T2 (SUBSTR(C1,-2,2),C1);
Solution #2
The second solution is to make another column in both table and place this 2 digit information in it, and then index this new column. That way the join will look like ...
where r.c_new_column = d.c_new_column
and
r.c_new_column between '01' and '72'
also with this new column the BETWEEN clause at the end you will not need the substring as well. Also remember BETWEEN on character values is different than numbers.
Final Notes
I just tried creating the functional index and I can't get it to be used it for some reason (I might not have the right amount of data), but I really think that is your best option here. As long as it uses the functional index you won't have to change your code. You might want to try using INDEX() in the hint to get it to be used, but hopefully it will use it right away. Try all 4 types of optimizer modes (CHOOSE, RULE, ALL_ROWS, FIRST_ROWS) in your primary hints to see if it will use the new function-based index.
You really do need to get explain plan going. Even if you make these functional indexes you won't know if its going to be using them until you look at the EP results. You can do EP manually (the SQL of how to produce the results is in OTN, though I find free TOAD is by far the easiest) and you will still need to have run the utlxplan.sql script. Oracle I do think has some GUI tools, maybe in OEM, that have explain plan built in as well.
I hope this helps ya,
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In receiver File communication channel I don't see any option where we can specify the XML path for the file name.
For example:
If my inbound XML structure (inbound interface) is like below:
<filename>file123.txt</filename>
<RootNode>
<Element1>Product123</Element1>
<RootNode>
From this I need to pick the filename value and generate the output file with the same value.
How can I achieve this? Please help!
Thanks & Regards
Gopal
Edited by: gopalkrishna baliga on May 3, 2011 1:10 PMGopal,
You can use DynamicConfiguration class for this.
You need to write UDF for this and with input of filename you want to set and map this UDF to the top level node.
Refer the below famous blog from Micheal:
/people/michal.krawczyk2/blog/2005/11/10/xi-the-same-filename-from-a-sender-to-a-receiver-file-adapter--sp14
You can also use Variable substitution to get value from payload, search SDN on this.
--Divyesh Vasani -
Please Help. Problem Assigning Datasource
I created a test Master data Infoobject abc_xxx and loaded data and then after testing deleted it. Now when I am trying to assign a new datasource to an existing Infosource from where I loaded data into the test Infoobject , I am getting error message that there there is no InfoProvider or data target named abc_xxx.
Could anybody please help me out here?
Thanks in advance.I am getting error message that there "there is no InfoProvider or data target named abc_xxx(name of Infoobject)"
If you are not trying to use this infoobject, the above message should not appear at all.
Please follow the following steps to assign a source system.
1. Goto Source Systems and check the source system u want to use is in Active state.
2. right-click on ur InfoSource -> Assign Datasource
3. from the drop-down, selet ur source system
4. choose a datasource if the source is r/3
5. modify/change transfer structure/comm structure/transfer rules
6. save n activate.
Hope this helps. -
Compressor only exporting left audio channel in AIFF! Please help!!
Hi, I just realized that the files that I have been exporting using compressor have been only exporting the left channel of audio. I am not sure what the problem is and would appreciate any help anyone could give me, as I'm on a big deadline and need to solve this ASAP.
The way I've been doing it, is I right click on the sequence name in Final Cut Pro and select Export > Export Using Compressor. Then I selected the DVD Best Quality 90 Minutes option. The AIFF file that is created seems to only have audio in the left channel. The original files themselves are definitely stereo, and play both channels in Final Cut.
I really don't understand. The Inspector within Compressor shows this information for the AIFF file:
File Extension: aiff
Estimated file size: unknown
Audio Encoder: 16-bit Integer (Big Endian), Stereo (L R), 48.000 kHz
It says Stereo, so I don't know what the problem is! Please help!!!Glad I could help.
Sorry for being a bit unclear, and actually misguiding you a bit on the reference files. Reference files are referring to the original media/render files. As long as you do not change the actual media/render files, you should be able to do changes to your FCP project. If you have not rendered before you export a QuickTime Movie reference file of your sequence, it will render on the fly and put the render files inside the reference file with the audio.
I would recommend reading more about self-contained files and reference files in the Final Cut Pro User Manual -> Volume IV -> Part III -> Exporting QuickTime Movies -> Choosng the Type of QuickTime Movie to Export
From the manual:
Choosing the Type of QuickTime Movie to Export
You can create two kinds of QuickTime movies with the Export QuickTime Movie command—a self-contained movie or a reference movie.
Self-contained movie: A self-contained movie contains the video and audio media— all of the data used to create your movie is within a single file. This single file can be safely and easily copied to another computer without worrying that you need other files to play it back.
Reference movie: A reference movie is a very small file that contains pointers, or references, to all of the captured clips used in your sequence. The actual media is located in the original media files. If you rendered your transitions and effects before creating the reference movie, then there are pointers to your render files as well. Otherwise, all of your transitions and effects are rendered using the current level of compression, and then embedded inside the resulting reference movie, increasing its size. All audio tracks, mixing levels, cross fades, and audio filters are rendered and the resulting stereo or mono audio tracks are embedded in the reference movie.
Exporting a reference movie saves time, since you don’t have to wait for every frame of your edited sequence to be duplicated. It also saves hard disk space, since pointers to other files require little space. Reference movies are particularly useful when outputting your sequence for compression using a third-party compression utility.
However, reference movies are not very useful as a means of delivering video files to other people. If you give someone a reference movie, you must also give them the original video files associated with that movie, which can be complicated since you may not know where all the referenced media is stored on disk.
In general, exporting reference movies increases the risk that the movie may not play back. Reference movies are best used when you have short-term uses for the exported movie file, and you only plan to use them on the system you exported them to.
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