WLAN Detail Measurement and logging
Hello,
at an event with +150 WLAN clients should I create a report for WLAN usage over the event time..Network environment:
- WLC 5508 (7.2), AIR LAP1242G, access switches: 2960SCriteria for the report:
- How many wireless clients were generally in time connected / associated?
- How long each client was connected or active?
- What has caused traffic each client and all?
- When was which client on which AP is associated?
- How many clients were on the individual APs in each account?Dignity for Netflow (Prime as Collector) sufficient or do I need more?With which board means and how I can for example also in the controller LOG to see when which client was associated with which AP (to find no setting)?What tools can I help it still inserting. Ideas?
I already thank you for your feedback and professional helpBest regards
Alexander
Hello,
sorry, bau at the moment i've found this dokument about Client Reporting with Prime:
http://www.cisco.com/en/US/docs/net_mgmt/prime/infrastructure/2.0/user/guide/reps.html#wp1059688
If someone still one more thing?
Many Thanks
Alexander
Similar Messages
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Hi!
I have serious problems playing the video Developer Walkthrough of the Continuous Measurement and Logging Sample Project.
As the video pauses every few seconds for buffering. I am not able to watch it. Just wanted to check if you can playback the video:
http://zone.ni.com/wv/app/doc/p/id/wv-3401
This happens on any browser (chrome, ie, firefox). I am using Win XP and the latest Adobe Flash Player. About 2 weeks ago NI Germany confirmed the problem and promised to contact NI USA as they are responsible for these videos. So far nothing happened. In the meantime I received an e-mail that the problem could not be confirmed although they had confirmed it before...
Thank you for any feedback.
Regards,
AnguelHello ctVolFan,
As indicated in the "support" section of the SPOT, you should get in touch with self-paced-training(at)ni(dot)com. I don't believe that team monitors these forums directly.
Regards,
Tom L. -
Developer walkthrough fails on Continuous MEasurment and Logging
I am having problems watching these two videos:
Developer Walkthrough of the Continuous Measurement and Logging Sample Project
http://www.ni.com/video/2741/en/
Developer Walkthrough of the Continuous Measurement and Logging Sample Project
Queued Message Handler Template Documentation
http://www.ni.com/video/2728/en/
It gets stuck at the start saying Slide 1/1: Buffering.
I have downloaded the latest Adobe flash. A guy from NI support rang in response to my question to them and said that it worked on Chrome for him. I tried that and they don't work for me.
Can anyone help?OK, one update from my side:
On my machine (Win7, 64bit) it is working when running Firefox 29.
Using IE9, the link to the video seems to lead back to its page, no popup, nothing.
Point is, that my IE (since IE8) is obviously not 100% compatibel with Adobe Flash player. For instance, i have issues to play videos from YouTube on the machine using IE (error messages like Flash not installed or simply a blank screen instead of the video) but not for all videos there. With Firefox, i can view all videos from YouTube except the ones which are prohibited from YouTube due to national restrictions ("This video is forbidden in your country" or something like that).
So all in all, it seems to me that the issues you all observe are issues between the browsers and Flash, invalid settings for popup-blockers and specific "error handling" of specific browsers (which create the "loop-link-behavior").
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it. -
How best to modify Continuous Measurement and Logging project
Hi,
I'm looking to log and aquire continuous data from some devices, and it looks like the Continuous Measurement and Logging project template is a great place to start... but I need to log/acquire from upwards of 20+ devices...
What's the best way to go about making this template more scalable?
ThanksYes the CM&L project template is a good framework to hang your code on .
(You find it with "Create Project" in 2012 and later versions)
The developer walk through is useful for the first time getting into the project.
With 20 devices I have to ask what kind of throughput are you talking about here?
Jeff -
Continuous Measurement and Logging Template - May hang-up due to lost Exit
The template Continuous Measurement and Logging in LabVIEW 2012SP1 has a flaw in the both the Acquisition and Logging loops.
The Stop message handler discards all messages in the message queue. The note says:
"Stop - Flush the queue of any pending "Log" messages. Close the TDMS file reference." See picture below.
This concept breaks if the Exit message is posted while the Stop message is being processed. The Critical time gap for this to happen is small because Exit is posted to the front of the queue. But it depends on the processing in the Stop handler case. Small or large - it can happen.
The symptom is that the application hangs in an infinite wait on the message queue - all controls are with no effect as the rest of the loops are terminated. Only Break will terminate the application. Pause button does not work either. (see this forum entry)
This problem may only appear after the application has become more complex and the timing has changed - the fresly made template works and does not reveal the issue.
The cure: First I thought of previewing the queue elements before discarding them selectively, one by one in the Stop loop, but that wont work either, because the Exit may arrive precicely in the time laps between preview and dequeue - remember Exits are posted to the front of the queue.
I think the best option is to replace the flush of the queue in the Stop message handlers with a Selectively dequeue of messages one by one and check each if Exit is found - if so, re-insert it into the front of the queue. All other messages are discared. This look like this, having the interesting parts visible...
Below is what the Stop message loop looks like with the problem highlighted.
Given that I am not mistaken, I think it is better that NI updates the templates to prevent this problem.
Solved!
Go to Solution.Here's what the idle state case within the stop message case looks like:
We don't hang the CPU handling a constant stream of no-op messages because we only enqueue "Log" messages when we are in the valid logging state (the Idle state here is again a passthrough).
The worst case scenario is that there are number of Log requests already in the queue when the system stops. Upon recieving the Stop message the state transitions to idle and the remaining Log messages become no-ops due to the state.
I will look into the feasibility of posting some updated VIs.
~Simon -
How to measure and log frequency with fieldpoint CTR
Hi,
I am developing a data acquistion and control system for an engine dynamometer using the fieldpoint modules and Labview. One of the most important signals is the engine speed, measured in RPM. The RPM signal is a 0-12V pulse where one pulse equals one revolution of the engine. As well as being an important piece of data for later analysis, engine RPM will also be in the input into a PID controller, so the signal must be both accurate and have a high measurement frequency.
Currently I am using the FP-CTR500 modules to measure the frequency of the signal. I am already aware of the included frequency measurement VI example, as well as the one posted before for low frequency measurements, and I have gotten both to work with my setup. I would be using the low frequency VI becuase the max frequency measurement would be in the 200Hz range.
The first problem I am having is with the structure of the VI and how the data is output. The case structure in the VI activates when the counter is read and resets the counter, then switches to the next case. I would like the RPM number to output out of the case structure into a write_to_file VI and PID controller input. The problem is that when the case switches, the counter is reset to 0, which will be recorded in the written file.
This is some example output data (RPM):
1232
0
2321
0
2400
0
2521
0
The data is being written correctly, but of course I can't have 0 readings when the case structure changes. This would be especially problematic when input into a controller VI.
The next problem I am having is with sampling rate. If I were to use the low frequency measurement VI, the sampling rate of RPM would be variable based upon the the speed of the signal. Or, the original frequency measurement VI has an adjustable sampling rate. Of course, in my system there are a number of other signals that need to be recorded at the same time. I have found that as I am collecting data, the "write to file frequency" is entirely dependent on the read frequency of the frequency measurement. Therefore, if I had set the read frequency VI to read at 1 Hz, data will be recorded only every 2Hz. Ideally I would like an overall measurement frequency of all channels (mix of analog and digital) to read between 20-50Hz, but if I am limited by the frequency measurement.
Any ideas on how to solve this problem, either through Fieldpoint or Labview?
I can post my VI if this help.
Thanks,
HuangThanks for your reply.
I should probably describe my current setup before I go into anymore details with the problem. As for my specific setup, I am using an FP-1000 connected with an AIO600, AI110, CTR500, and TC120 all running through the RS232 line to a desktop running labview 8. The actual counter module is reading a tachometer signal output from a separate engine controller. THe output is a 0-12V ON 50% duty cycle signal. As for data logging, i am simply using a "write to measurement file" Express VI. I have a while structure which holds all of the express VIs which access the fieldpoint IO, and these are all routed to the "write to" VI.
As for the specifics of the data logging problem, as I said, when I set the count frequency of the "Fieldpoint Frequency Measurement" VI to 1Hz, (which means the VI calls the case structure at 2Hz), the "write to measurment file" VI is called at the same rate (2Hz). Which means that the overall logging rate of the VI is only 2Hz. Is there someway to decouple this?
I was able to solve the problem of calling the frequency variable from the case structure by using a local variable which is called outside the case structure.
And now I have been having a lot of problems with reading the actual frequency from my engine controller. THe actual signal will only range from 0 to around 200Hz. I noticed, by comparing the actual signal to what was being read in my labview program, that after around 80Hz the signal increases by around 1.5times more than the actual signal. ie. Actual signal = 100hz, Read Signal = 150Hz. After trying to figure out what was the problem, I decided to change the Noise Filter settings to 200Hz. It actually worked for all the frequency ranges up to around 150Hz but after that the filter attenuates the signal to the point where the actual signal is 160Hz, but is being read at 100Hz. My question is if there is a way to change the actual filter setting outside of the 2 given setpoints (200hz and 40khz) or if you have any other suggestions on how to fix this problem? I was thinking of creating a noise filter input in MAX so that i could play with the values in Labview, but am i only limited to those two filters?
Thanks again for your help,
Huang -
Continuous Measurement and Logging LV2014
Hello,
I am examining the CML template which can be found in LabView 2014. It is very nice, I learn a lot just by playing with this template. However, due to the very minimal documentation (practically zero), some things are not clear why are there implemented?
1., In the UI Message Loop, the Case structure has a "Confirm Quit" case. As I see, this case never can get triggered, since the stop button is disabled during DAQ, why is it there? I guess for to give an example, if someone wants to enable the option shutting down the app during DAQ, without stopping the DAQ?
2., Since it is not explained in the documentation, could someone explain the behaviour of the enum type def in the UI Message Loop? I think I understand that, before stopping the DAQ, we have to be sure about first the DAQ is stopped. Second, all the data is logged, so the logging loop can be also stopped, and finally we can go to Idle state and "update status" message can be broadcasted. Am I right? Somehow it is still a bit "fuzzy" for me...
thanks for help!
Regards,
Solved!
Go to Solution.crossrulz wrote:
I don't even put Stop buttons on my programs. Almost always, somebody who was not familiar with programming LabVIEW would use the 'X' to close the window. So when I discovered the Panel Close? event, I was overjoyed.
yep, actually the problem is not that the user uses the X or a "stop" button, but that, we let the user to be able to quit the application without first stopping the DAQ. Would not be just easier to fire a pop-up dialog, telling the user, "hey, first stop the DAQ before you quit!" ? So some state-check could be avoided in the UI Msg loop`s case structure...
2.: May I ask a CML related additional question? If I wish to extend the template with another DAQ loop, which has a different rate, or a loop which controls for example a flow controller, how would you do it nicely? Of course we create additional queues (notifiers too if we need graph plotting), etc. but how do you implement the state machine for this new loop? I think we need a separate enum typdef in the UI msg loop, since we need total decoupling between the DAQ and DAQ2 loops? Is that correct, or is there another way to do it? Maybe more compact if we create a cluster typedef, and we put the enumtypdef1 and enumtypdef2 in it, and we unbundle by name them only in the corresponding cases? -
LabView 2012 Continuous Measurement and Logging (DAQmx) Project
I've been working with this example to try to build a DAQmx and Serial acquisition message handling loops, as well as another message handling loop with two analog outputs for control. This control would also be based off of information from the DAQmx acquistion loop. Is this example appropriate to do this with? I've added two additional message handling loops (Serial and the AO control loop). I worried that this example might not be the best to follow.
Attachments:
Main.vi 108 KBI'm not sure what example you are talking about but it seems like you are wanting something like the document below.
http://www.ni.com/white-paper/14119/en
Carl W.
Applications Engineering
National Instruments -
Add multiple simultaneous data sources to Continuous Measurement and Logging Template
I am looking at using the Continuous Measurement and Logging sample project as a starting point for my project. The template shows the use of a single data source at a single rate. In my case I have multiple data sources that will arrive at different rates and need to come together and be logged to the same file with the fastest arrival dictating the log entry and the slower data would be their last values. It is a slow data collecton process ranging from 1 second to around 10 second sample rate. More of a monitoring application with logging than a data aquisition application. Since the waveform data type is base-t plus delta-t and my data arrives at varying rates, my first task would be to remove the use of it and define a typedef for my data. I would use a single logging message loop, but what approach can anyone recommend for the aquisition? I imagine separate aquisition message loop vis for each data source but what about placement? Placing them all at the top level vs placing them within a the existing aquisition message loop vi? Any other thoughts or recommendation are appreciated. Thanks in advance!
if you want to sample one channel at 10/s and an other one at 1/second.... How is your file going to look like? Does this mean that for the slower channel you just want to keep the same value for the other 9 values?
The sampling speeds that you are talking about are really slow. It would certainly not hurt your hardware to sample eacht channel with the same speed. And it you really just need one sample every 10 second, you can always decimate you array of values.
For instance :
channel 1 : 1 point per second (sample ratio) => 10 points in 10 seconds
Channel 2 : 1 point per 10 seconds => 10 points per 10 seconds (same sample speed) => decimate array (keep 1+/10 values) => 1 point per 10 seconds
This is going to be the easy way, or you want to start with parallel loops running, but that's "not that simple" anymore
Kind regards,
- Bjorn -
Have fun using LabVIEW... and if you like my answer, please pay me back in Kudo's
LabVIEW 5.1 - LabVIEW 2012 -
Continuously measure and write waveform using tdms
Hello everyone,
I am doing my thesis using Labview 2010(since it is only version avaliable in University currently ). I need to read and record data from microphone(currently using simulate signal since i need to make program work first) then save and analise it(didn't reach that point yet). I tried to use event structure so i can record and then read tdms file. But unfortunatly it records only small piece, then i inserted while loop so it will record continuosly but program doesnt respond after i push record and i can only close it manualy from toolbar. Please could anyone help me or suggest something since i am not very good at Labview and any feedback is welcome. Here is what i have done till now. I tried to search forums for some similar solution but could not find anything usefull(some had much newer version so i could not open). Thank you.
Solved!
Go to Solution.
Attachments:
test2.vi 45 KBHi and welcome to the forums,
The reason you cannot stop the recording of the waveform or exit the application is because you have the event case configured to "lock panel until the case for this event completes" (in edit events). This means that LabVIEW will not respond to user interaction until that event structure completes but because you rely on being able to press the while loop stop button to finish the event structure means you have a deadlock and have to abort the VI.
The architecture of your application is not ideal - I would strong advise against having anything that takes a long time to execute inside your event structure for the very reason above (obviously you can untick lock panel as a quick solution). I would suggest having a look at the producer/consumer design pattern (events) (new... > from template > frameworks) as this would be more appropriate for your application. You can handle your button presses in the top event structure and have a state machine in the bottom loop for starting, running and stopping your data acquisition.
The idea is that you only do very little inside the event structure so it frees up the front panel but the messages (e.g. start/stop acquiring data, exit application) are handled by another loop.
I don't know if it ships in LabVIEW 2010, but in 2012/2013 there are sample projects that include a "continuous measurement and logging" project which might be suited to your application. There are also examples for state machines and queued message handlers.
Certified LabVIEW Architect, Certified TestStand Developer
NI Days (and A&DF): 2010, 2011, 2013, 2014
NI Week: 2012, 2014
Knowledgeable in all things Giant Tetris and WebSockets -
Hi can anybody help or advise me? I've recently bought the i-phone 4s, I've set up my apple I.D and password but everytime I try and log in it says "this apple I.D has not yet been used on the i-tunes store" I click "review" follow the instructions and agree to the terms and condition's, enter my bank details but it declines every time? I've tried both my accounts and its declined both, this stops me from logging in so I can't download anything for free or buy anything, my sister had the option of skipping the bank details part when she created her apple I.D and just enters her's when buying something, why do I not have that option?? And why is it declining my bank details...please HELP!!!!!
The details I'm entering are correct, I choose visa as my card type, enter my card number, enter my expiry date and my last 3 digts on the reverse of the card, enter my address and zip code plus my home telephone number, click continue and it says "the payment method you have selected has been declined, please enter another payment method". I've lost count how many times I've tried, I've typed my details in slowly making sure I put them in properlly and it still declines it, I've even tried makeing a new apple I.D and when I get to the bank details part it declines it again so I am forced to press cancel and all details are not saved so its just like I'm hitting a brick wall, its ******* me off!!! I can't even download any of the free app's because to do so you must log in but when I do it says "this apple I.D has not yet been used in the i-tunes store" review my details and can't get past the bank details part. So doesn't log me in, I'm honestly out of ideas
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How can we a validate a CSV file in SSIS and log the error details in another CSV File by using Sript Task.
Please see:
http://www.bidn.com/blogs/DevinKnight/ssis/76/does-file-exist-check-in-ssis
http://social.msdn.microsoft.com/Forums/en-US/01ce7e4b-5a33-454b-8056-d48341da5eb2/vb-script-to-write-variables-to-text-file -
Hey guys, when i try and log in to itunes, even though the details are correct it is showing up as an error and not allowing me access to my account.. could anyone help?
what is the error?
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remains. I still cannot log in to UHRS.
The problem occurs only in IE on my computer. In Chrome or in IE on my husband's computer (we are both using IE 11) there is no such issue.
Well, in that case. Try this:-
Go to: www.live.com and log out if you are signed in to your UHRS cw-email adress. (Do NOT save your UHRS password, otherwise you have to do this everytime.) Log in to your UHRS account again.
If still not, then try this:-
Please see: What
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See: "How
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If still same then can you tell me from when it started happening ? Like which thing did you installed/modified last time from when this problem started ?
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Some problem about SAP R/3 ~ I need some detail solutions and suggests
I need some detail solutions and suggests about below these problems:
Problem 1: SAP Management Console cannot start successfully
Problem 1.1: Click on SAP Management Console, but yellow light continues for a long period of time.
Problem 1.2: In DOS, startsap command cannot start SAP R/3.
Problem 1.3: Oracle 9i database automatically shutdown by itself.
Problem 1.4: There is very low disk storage left (say less than 50MB) in the hard disk where Oracle 9i database is installed in the server.
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Problem 3: Problems in the configuration of client copy
Problem 3.1: A copied client from the Client 000 cannot be customized.
Problem 3.2: No sample data in IDES after a successful client copy.
Problem 3.3: Logging on without being authorized. A new client is created and client copied and transported successfully. However, anyone can log into the system using user SAP* with the default password PASS.
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Problem 6.2: Some users complained that the performance of SAP R/3 is really very slow.
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2.1 If user account of the sap* is lost u can retrive by loging into os level as sidadm type this command
DELETE SAP<sid>.USR02 where BNAME='SAP*' AND MANDT=100
This 100 is the client in which u want to delete the sap*
after that restart the server and login as sap* with the default password as pass
there is also another way of doing this if needed u can catch me at [email protected]
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