how to save data on a graph and then add new data to it

i am currently plotting data on a graph from a physical system. However when i want to add new data to the plot, the old one is replaced. I am trying to do more than one plot on the same graph, where the incoming data is at different times. I want something like Excel where i can just add a new plo

Has anybody been able to develop labview vi's for the...

Has anybody been able to develop labview vi's for the A200SMC stepper motor controller from StepperControl.com? Trying to make labview vi based on the dll library provided by StepperControl.com using the "Call Library Function" in labview. The controller interfaces the pc by parallel port. Is ther

Trying to control a car using the Digital Control Unit

I am not having much luck with LabView 7, as far as running the code becauase the code has changed with the new Visual Basic.NET and Vernier software has yet to update it. Has anyone connected the two to run a car with two ac motors and with a motion sensor at all or can give me some pointers or e

what can i use usb driver in win2000?

I want to configure my usb controller with this example in windows 2000. I use my pc computer's usb in equiment's managers. I have four usb controllers(ONE:intel(R)82802BA/BAM USB Universal Host Controller-2442. TWO:Intel(R)82802BA/BAM USB Universal Host Controller-2444. THREE:Usb Root hub. FOUR:Us

Re: lvrt.dll error on Windows XP

Thanks Jeremy, But i have to use a powerfull machine with high configuration, the processor of the machine is 800 MHz Bus Speed, which the 98 can't run on, so i have to use either 2000 or XP, i forgot to tell you that on 2000 i get an error when i try to start the application and when i click ok, i

Tabbing position in a cluster

Hello John, You can use the 'Controls[]' property to get refnums to the controls in your cluster. This array is indexed as per the cluster order (and thus tabbing order). For each control refnum, the 'KeyFocus' property would tell you if it's in focus currently, implying if it's the one that'

Re: Setting control default value

At 11:12 PM +0200 4/8/04, Christophe Salzmann wrote: >Does anyone know how to set programmatically (via the VI server) the default >value of a control, this when the VI is running? That is one of those things that can't really be done since it actually is an editing operation. This means that th

Re: I encountered a problem with Peak Detector.vi:

When I set your threashold terminal to 0.0015 and a width of 3, I got 7 peaks with the appropriate corresponding amplitudes. If you want more peaks, then decrease the threashold. When I set it to 0.4, I got 23 peaks. Since you are interested in getting all the peaks, I think you need a diffe

Re: excel version at VI start

does someone have some sample code on how to read the registry keys? ideally for EXCEL versioning.

Re: How to link to a VI in an EXE

Well, there are a few issues here. First if you want to load the VI from your other application you will have to either reference it by the path /otherapp.exe/yourVI.vi or alternatively using VI server open a reference to the other executable and then opening a reference to the VI through the VI se

Re: How to link to a VI in an EXE

Denis Jolivet wrote: > Hi All, > > I have two modules of code. The first is either in VI or EXE format, > the second is in EXE format. I want the first module to link to a VI > in the second using call by reference node. I find that when I try > this I get error 1003 (The VI is not executable.)

Re: Populating a combo box

Hi Darren, Thank you for this. I did not mention in my first post that the combo box was in a cluster. I've been able to do what I want by using a vi that is new to me: 'To more specific class' and attaching a Combo Box Refnum constant as target. Thanks again.

Setting control default value

Does anyone know how to set programmatically (via the VI server) the default value of a control, this when the VI is running? Thanks Chris

Re: OpenG Coding Challenge - Remove Backspace

Sam Behashtei wrote: > Jim, > > Are you going to post new times? April 30th deadline is approaching > fast and if you leave it too close to the dead line some of us may not > have a chance to re submit new/improved entries. > > -Sam What kind of message does that give? You're already best so can'

Re: SubVI Connection Description is the Caption?

[EMAIL PROTECTED] wrote: > Shouldn't a control's label be used as the connector label or am I > crazy? I guess there is still new things to learn about LabVIEW even > after using it for 11 years. Are you sure the control wasn't displaying the caption instead of the label? It's caught me out befor

Re: Uniquely identifying computers

Scott Serlin wrote: > A simple method that I use is to use the "system exec command" and > issue the "set" command from the dos prompt in win2k. From there you > can pick off the username logged into the computer. You can try this Hmm. "Administrator" -- Dr. Craig Graham, Software Engineer Ad

Re: Populating a combo box

Hi Martin, I think you are having this problem because the control reference input terminal on your subVI is the incorrect class. You can easily create a control reference control that is the right class by dropping a control refnum from the Controls > Refnum palette on the front panel, then ctrl

Re: vi doesn't work when called,but works if opened

Could you provide a little more detail? What is parallel2.vi? Could you attach it and your main program? You say that the main VI is saved with all workings in a DLL. You've used the app builder to create a DLL from the main and only then the subVI doesn't work? What exactly doesn't work>? Do you g

Populating a combo box

Is it possible to populate a combo box located in a main.vi from a subvi using refnum? I've been able to do it within the same VI using the property node 'String[]' but this property is not available when used with control refnum. Any tips to do this from a subvi?

Re: calibration of the voltage

11 bits resolution (an unusual number, by the way) is equal to 2^11 = 2048 discrete values that a single reading can take. If your card has a range of +/- 10 V, then that's a 20-volt spread, divided into 2048 steps (I'll assume -1024 to +1023). That means you have a resolution of 0.009766 Volts. (2

Re: NIDAQ 6868 cable same as SCSI2 cable?

Stephen, Here is a link to a Knowledge Base, which contains detailed information about our SH68-68-EP cables: http://digital.ni.com/public.nsf/websearch/36220E8F02BF21288625686900766E27?OpenDocument In general our cables are built to preserve signal integrity. Our cables feature individually shi

Re: Loading parametrs using DNET and labview

Thanks Scott...I think I have figured out how to go about doing it. If I have further questions, I shall keep you posted. Thanks.

Re: Best way to pass an array of waveforms inbetween VIs

You're probably tired of hearing me say this, but the global function idea is the best. A global variable makes a COPY of the data each time you read it. That takes time, and memory. If each of 3 window reads the global, and picks out a channel, then you've made 3 copies of the original data. Depe

Re: Multiple Plots In Seperate Windows

I look around a lot to see if I can answer questions but I havent found any yet that I have half of a clue how to answer. I have only been using LabVIEW since Feb. Thanks for everything.

Re: How to calibrate Quadrature Encoder signal

Hello, Thank you for contact National Instruments. Here are some links to documents on our website that should be very helpful for you in understanding your encoder and application. One of these links is even an example program for LabVIEW that you may be able to modify to do exactly what you ne

Re: Password protection, implementation issue

Mexx; In this scenario, because there is no specific documentation on how it is implemented, the trust you put on the password protection mechanism derives from the trust you have in National Instruments and its reputation. It is equivalent to the trust you have in LabVIEW - http://digital.ni.com/

Re: Is the following possible in Labview?

Quite easy to do. In your block diagram, right click on the control and select "Create - Property Node" It defaults to the "Visible" property - which is what you want. Change it to "write" mode. Go to the top of your functions palette, and select the floppy disk. Select one of the "Read File" that

Re: Is the following possible in Labview?

It's actually pretty simple. You can take a couple of different approaches. For each control/indicator you can create a property node. One of the properties is Visible. You could have a .ini file with entries for each control. Use the Read Key function (File I/O>Configuration File VIs palette) to r

Re: Serial port Write then Read issue

Depending on the driver in use - there may be a setting in the hardware settings/device manager in Windoze control panel. My system allows me to turn on local echo through the driver in the device manager. Annoying since my program does that function automatically. Rob

Re: using the parallel / serial port to drive 7-seg display

Jeremy, Thank you for starting my trial support membership with NI, it will greatly assist me in my project. I am horribly insufficient at working with the parallel port in labVIEW. You said that I can use ssp mode on the port...how do I do this? Please excuse my ignorance in this matter. Thank

How to display properties of a selected cursor when several cursors are available?

I have a list of 8 cursors and would like to show the information of one cursor (which the user has slected) in the cursor legend of the graph. But I dont want to expand the whole cursor legend until all cursor properties are visible because it occupies too much space in the front panel. How do I

Need information about the "Get All Control Values" method

>From a top-level VI, I need to get a list of controls/indicators that are on a sub-vi. I need to know the type of data it handles and feed it values based on the data type and range. I was looking at the "Get All Control Values" method and it seems to have a lot of information, but I can't find

Re: CRC-16 (Polynomium 8005)

It depends on how you intialize the algorithm and on whether you are reversing the sequence or not Refer to the following discussion thread.. Has vi's that are purely G, no .dll http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=506500080021AF&UCATEGORY_0=_49_%

Re: The driver was installed.I tried but it gave me...

I guess you didn't see my http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=5065000800B8CB&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0";>answer to the same question you posted 3 days ago. To repeat, you cannot use any of the NI DAQ functions in LabVIEW (i.e. AI Read, A

Re: Is it possible to modify programmaticaly a custom control

Hi Jumarion, Really good examples. Sanaa TAZI Application Engineer National Instruments

Get all control references of a panel returns different things on different PCs

Hi all, for initialization I have task to do with many of my controls on the front panel. So I use the property node of the front panel to get an array of references to the controls. All worked fine but now I structured my controls using a tab control. The very strange thing is, that on my develo

Re: I am trying to make a Phase Locked Loop and I have to...

Greetings: It looks like you need to increase your number of samples by quite a bit. Can you supply any more information, such as your sample rate, which DAQ vi you're using, etc? Eric

Re: why does my computer restart when I push run?

Brian, I have had this same problem with other types of daq cards. What i found out is that labview for some reason could not initialize the driver correctly and would crash or I would close out labview wrong and it would not close out the driver, then when I restarted labview and hit run on My VI

Re: Is it possible to modify programmaticaly a custom control

Thank you very much indeed Sanaa. Forgive me if the comments are in French in the VIs. I try to do my best to answer to the questions but I've read some of your answers and I really can't reach your level... Thank you anyway for your rating, I'm gonna become an enthusiast pretty soon if you help m

Re: how do I compute all possible permutations (eg:abcd) not just

> I want to compute all possible permutations of an input (string or > array)! input with variable length > input could be: abc > output should be: > abc bca cab > acb bac cba Look at the problem this way. Place the three characters above in a circle, a necklace. Get three patterns by rotating

Comment créer une tempo independ

Je cherche =E0 r=E9aliser une tempo sous Labview qui soit independamment du syst=E8me d'exploitation?

Re: VXI libraries update

Following with Dennis's solution here is a link to an example taht can automatically remove the VI.lib files from an LLB. Run this example on your LLB and you shoul dthen be able to open the top level VI up and it will find the new vi.lib files rather than the old ones. You may have to run the VI

RE: Running two copies of VI and seeing two FPs

Save the VI as a template (.vit) and then open two (or more) references with the VI server Open function. Each Open creats a new instance of the VI in memory. You can then open their front panels, run them, etc. Daniel L. Press PrimeTest Corp. www.primetest.com

Re: calling a jpeg compression dll

Wiebe, Thanks for your response. Unfortunately the VIs you talk of read and write images to and from files, and cannot be used to convert an image directly to jpeg without streaming it to a file. I am in need of a method to convert my VI images to jpeg format for networking via TCP, without saving

Re: clearing array on button click

hi Djadjok your ex. is a guideline for new commer like me but still i am in trouble. i understood the use of local veriable In my case i have 2 different array to plot graph i use one array for x values one array for y value. now my problem is how to asign local variables for X,Y values of the grap

Re: I am looking for labview examples related to ECG

Burcu; I am not sure what type of examples are you looking, so this is a start: Searching at the LabVIEW Discussion forum I found: http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=50650008006755&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0&USEARCHCONTEXT_TIER_0=0&US

How to calibrate Quadrature Encoder signal

I have PCI-6601 and CB68-LP connector. How can I use these to interpret quadrature signals coming off an optical encoder (to sense the angular position of an-observatory dome). The encoder is 16-bit(don't know what this means in terms of PPR). I want to have a display in Labview that will show me t

inputting data into an excel file

i need to input data into a file now when i use the "write (or read) to spreadsheed file.vi" i get a blank page unless the file is a text file and not a spreadsheet file... how do i do it so that i can write to an actual SPREADSHEET file... thank you

Re: Reading Text Files and storing in Array

Shakes; You can download modified versions reading text files from file VIs from my website. One of those is Read Strings From Spreadsheet File, a modification of the Read From Spreadsheet File VI included with LabVIEW. http://www.jyestudio.com/lview.shtml I hope they are of help. Regards; Enri

Re: How do you avoid local variables?

In LV the wire is the variable. The controls and indicators are not supposed to be that much involved; they are there for GUI purposes and are used to send data to and from sub-VIs. Not much more. If you need the data many different places wire it there. The indicator can only show one result any

Re: How to change the color of the plot keeping the previous data displayed with some other color

"Controling colors with XY graphs" this question posted by Per Johan Brandvik on 6/22/2000 has the link to "Scatter plot.zip"

Re: PowerDAQ hardware with LabView

Which software? Neither MAX or the LabVIEW DAQ functions will work for non-NI hardware. UEI has their own set of LabVIEW drivers that you have to use.

PowerDAQ hardware with LabView

I am presently trying to build a custom application using LabView. The software can not find my hardware. The DAQ card I am using is PowerDAQ PD2-MF-16-400/14H. Any help would be greatly appreciated.

Re: Can't get Measurement & Automation to list equipment NI Spy says it sees.

This must be a pretty old box. I can't find any mention of it on Agilent's web site and there is no driver for it from NI. Can you describe what it is? Is it possible it has the same address as another instrument? Can it act as a bus controller? What do you get back when you do the IDN?

Re: Best way to pass an array of waveforms inbetween VIs

The "problem" I mentioned won't be from the code itself. It will work just fine, insofar as it won't crash or puke or anything. But I don't know your requirements. The (potential) problem comes from this: Suppose the DAQ posts new data every 1000 mSec. Suppose each window replots every 1000 mSec.

How to change the color of the plot keeping the previous data displayed with some other color

I am acquiring two data and after bundling them, I plot them using "XY Graph" with the help of a buffer. I am giving a sequence of commands to acquire the data. I would like to know how to give a command( n number of times in the sequence) to change the color of plot, keeping the previous data dis

Re: RDA delay

Hello, Thank you for contacting National Instruments. You have a couple options here. 1. Keep all of the processing on the server machine that is controlling the hardware. You should only have controls and indicators on your remote machine that will allow you to view the data and change parame

RE: Buying LabVIEW abroad

> Friends > I live near Toronto and the last I was told by NI was that my > sales rep was in Buffalo NY. This is getting a bit off-topic and I oppologize, however in case there are others that are not aware. NI has had 2 local sales reps in Ontario for many years now and they are doing a great j

How to enable Thread Local Storage in a DLL generated by application builder?

I used application builder to build a DLL. I had VC6 codes to load the DLL explicitly. Every time I called LoadLibrary, the handle returned is the same. I want each thread within my application to have its own copy of the DLL's variable. How to do it? Thanks.

Re: Puedo usar el modem de mi PC para manipular una tarjeta electronica?

Hola, Puedes usar NI-VISA para controlar el modem por los comandos seriales. Debajo hay unos enlaces con mas informacion: http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/1ecefaa7ad52994986256966005356ea?OpenDocument http://digital.ni.com/public.nsf/3efedde4322fef19862567740067

Re: Does anybody have driver for HP8756A scalar network analyzer? thanks

Hello -- Although we do not have a driver for the HP 8756A, you can submit a request for an instrument driver through our request database at http://zone.ni.com/idnet97.nsf/instrumentdriverrequest/. Your request may be considered for development. We try to develop instrument drivers according to

Modbus not working with LabView7 Runtime

I have recently upgraded to LabView7 and have an application that comm. with a ModBus Controller. Works fine in LabView 6 and using runtime 6. Works on my development computer using 7. On the same computer that it works fine using runtime 6 it won't run using runtime 7. Any Ideas?

RE: Image Resizing

Hamid, The answer you gave just didn't answer my question. It appeared that you didn't understand what I was looking for. I was trying to clarify what the problem was, but it must have sounded like I was upset or offended. It is more that a key feature is missing from the image control that ups

Re: How can I get Labview not to XY plot from 0, 0 to the first point?

Use a property node, Properties, Scale, Range. That should do it.

Re: Details on use of Device Control/Status.vi

I never used this VI but I did use VISA to do it. Get a Property Node on the VISA palette, right click on it and select Properties>Modem Line Settings. Others may disagree but I always prefered using VISA over the older serial drivers and in fact the old ones are no longer supported by NI or includ

Re: How to perform AI&AO simultaneously?

Cooly, There is an example included in LabVIEW called "Simul AIAO Buffer (E-Series).vi" that does simultaneous analog input and output on a single E-Series data acquisition card. With your setup you can use this example and modify the analog output portion to use your PCI-6703. You can find this

sound generator application crashes

I'm generating 90-degree phase offset sinusoids with noise on two sound card outputs (each card has stereo out for in-phase and quadrature output). I'm generating 4 sinusoids per soundcard and my user interface provides control over frequency and amplitude for the 8 complex sinusoids (16 real) as w

Connecting front panels to different block diagrams

When using LabView, we are working with an oscilloscope driver provided on the website. We have everything running properly, but we had a question about convenience. Is there any way to place the control for a numeric value on the front panel not corresponding to the block diagram. Exactly, we h

Re: how to plot the histogram with text.file

quite useful

Re: Is there an explanation VISA sessions, resources, and classes?

There is the NI-VISA User Manual (NI-VISAUsers.pdf) and VISA Help file. Both of these you should be able to launch from the Start>Programs>National Instruments>VISA. MAX has a help topic for NI-VISA/NI-VXI. From LabVIEW, you can go to Help>Search the LabVIEW Bookshelf and select the LabVIEW Measure

Re: error code no 6

Here is a link to your other http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HFORCEKWTID=95035:5&HOID=506500080049CB&HExpertOnly=&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0";>posting. Although I miss guessed your answer, it has info on finding this kind of information on

Re: clear an array

i have a problem in clearing array. 1. i have a vi witch on a button click add element in array ,and plot the values on graph. 2. second time when i run vi on graph i get all the values witch i got in first run pluse the values on second run 2. i want my graph should not plot values i got in first

Re: Is there an explanation VISA sessions, resources, and classes?

test

Can labview be used with any equipment that has an RS-232...

Can labview be used with any equipment that has an RS-232 connection? What other requirements are there? I am in the beginning stages of setting up a system of equipment for calibration purposes, but I need to be sure the equipment meets all of the requirements to run labVIEW. I only have experien

Re: Details on use of Device Control/Status.vi

Dennis is right--you should use VISA. The Device Control/Status function does not do what you want it to do. Brian

RE: API Serial Functions

> I do not think VISA is required for serial communication. > The minimal VISA installation that Dan Mondrik mentioned > would be fine for many applications, Yes, I agree, but it's still VISA... > but I have a requirement > where (for reasons I will not go into here) the customer > needs the

Intensity graph with polar coordinates

n my application, I assess a variable at each point of a polar mesh. I would like to represent the results with a color scale... It would be a kind of intensity graph based on a polar mesh instead of a rectangular one. Is that possible ? Thank you very much.

Zirox SGM5-EL Electrolysis Device

Hi Anyone familiar with, or even have drivers for, this new device or anything in it's family? TIA Blair Smith

SubVI Connection Description is the Caption?

When I created a VI recently, I noticed that a control's label in the context help did not match the control's label. I had copied the control from another VI and didn't realize that it had a caption set different than the label (only the label was visible). When I wired the VI as a SubVI, the te

Re: Serial communication using serial compatibility VIs does not return correct bytes at Bytes at Serial Port vi

A note that some PDAs (as we're finding here) have a local echo of everything that you send to the serial port. You may have to parse your input to remove the sent command and then read again to get any new input. A pain and it doesn't happen with all PDAs, so if you're only working with one type,

Re: Need information about the "Get All Control Values" method

Well it is quite simple!! The first is the name of the control, the second is the type descriptor as it is also returned by the Flatten to String function and the third is tha actually flattened data. The format of the type descriptor is documented in the LabVIEW Reference Manual and also in an Ap

Re: Problem loading VI's on a different laptop

I think the drop shifted the arguments to the wrong places :) . Do all the old VIs experience the same problem? When you check the propery of the files, what do they show? Can you upload one small vi that we can try it out? Maybe someone has the system than can open your file. -Joe

Fitting a Gaussian curve onto a set of data

I'm looking to plot a best fit Gaussian curve unto a set of data and was wondering if this is possible with just the labview 7 base development software. Any help would be greatly appreciated

Re: why does my computer restart when I push run?

> I have had this same problem with other types of daq cards. What i > found out is that labview for some reason could not initialize the > driver correctly and would crash or I would close out labview wrong > and it would not close out the driver, then when I restarted labview > and hit run on My

Re: Data Acquisition Question?

Greetings! Your application doesn't seem to be too demanding. Just about any Labview DAQ card will do the trick at such a low sample rate, and you might look at the DATALOGGING vi examples to get started. Good Luck! Eric

I am trying to make a Phase Locked Loop and I have to...

I am trying to make a Phase Locked Loop and I have to produce a continuous output with the incoming data; so I should not use a buffer which is refreshed in every 3 seconds (by this way I am not able to get a continuous output). How am I going to obtain a continuous output signal which uses a conti

Re: Problem loading VI's on a different laptop

I borrowed a couple laptops today (IBM Thinkpad, Dell Latitude) and finally got it working on the IBM. The IBM screen resolution only goes up to 1024x768 so I gotta fix that now but I can live with this. Things still did't work on the Latitude or my old Sager. Maybe it is a driver thing but the err

How to link to a VI in an EXE

Hi All, I have two modules of code. The first is either in VI or EXE format, the second is in EXE format. I want the first module to link to a VI in the second using call by reference node. I find that when I try this I get error 1003 (The VI is not executable.) even thought I know it is functi

Re: I need a sample vi that can plot a transfer function given...

The grayed out values of 100 just tell you that the default value of the control used inside the array was 100 (it is normally 0.00 but I may have copied the control from another VI that had default value of 100). The grayed-out values do not affect the calculation. If you want to get rid of this j

Opening a file

Hi, I need to build a VI which has to search for a file in a specific folder in the computer. The file for which the labview searches is initially not present in that folder. That file will be in the process created by a third party software. So I guess the lab view should use a loop which keeps c

Re: Need help trying to create a ActiveX registered event

Actually I got the answer from NI. When you wire the activeX control to the reg callback and then select the event, two inputs appear, VI ref and User parameter. You first wire your object to the user parameters, then right click on the VI ref and click create callback vi. The vi is then created

Re: Passing a string buffer pointer to a DLL in LabVIEW

Pascal calling convention is obsolete in Win32. It has nothing to do with Pascal string parameters but rather is similar to the cdecl and stdcall calling conventions you can configure in the Call Library Node. Rolf K

counting consecutive events

Hello, I try to count how often a true/false indicator is true. I'm using a "(U16) count: the number of TTL rising edges counted" after it, but with every incoming value the counter sets to 0. Therefore I always have 0 or 1 on the front panel instead of adding the new true to the previous ones. Tha

Re: Passing a string buffer pointer to a DLL in LabVIEW

What your problem with this is is the following assuming you declared it as this: static unsigned char MemoBuffer[MEMO_BUFFER_SIZE]; p4 = (int)&MemoBuffer; hasp(MEMOHASP_READBLOCK, SeedCode, PortNum, Pass1, Pass2, &p1, &p2, &p3, &p4) First you assign to p4 a reference (pointer) to the pointer o

Re: AI single scan and PWM

Sarah, It sounds like you modified "pulse width modulator.vi" but you only attached the pidcontrol_pwm.vi. Can you clarify the difference between "program" and "switch cycle"? I've experiment with Counter Group Config.vi set to "retriggerable pulse generation" and in that mode using"switch cycle"

How to install ISA/AT card

I'm trying to install an ISA/AT card using Windows 98 for use with LabVIEW software. I don't know the card model name or number, and the installation wizard isn't loading properly.

Re: Trying to display histogram to look out for peaks but I am unable to do so.

Hello Thanks for the reply. This chart is surely giving out some information. I am trying to understand what the x and y axis indicate in the lower chart. Other than that I guess I shall try to work on it now. Thanks for the help. Regards

Re: how about take an sample every 3 mins

Check my previous answer. Adjusting 'Delta (s)' control should do the job. Hope this helps Julien

Re: Modbus not working with LabView7 Runtime

Yes, I did rebuild the executable.

Re: Modbus not working with LabView7 Runtime

I am using serial visa as well as GPIB VISA. The GPIB VISA that I execute before the MODBUS works fine. I did rebuild and distribute with serial support selected. I get a null node at the execution point for the MODBUS code only in the 7 runtime environment.

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