Use blinking property node with a pipe indicator from Automation Symbols toolkit

Can I use a blinking property node with a pipe indicator/pump from the Automation Symbols toolkit? How?

The blink works just fine for me.
Ben
See attached
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction
Attachments:
blink.vi ‏19 KB

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Using a property node of a menu ring to generate a secondary address does not work in a subvi unless the subvi has been or is opened. Why?

I am writing drivers for third party equipment using LabView 6.1. I am using the property node, digdisp.text, to get the item number of menu ring. This number is being used as the GPIB secondary address for the equipment. This vi is one many subVIs like it in a main vi.
The only way the main vi works consistently is if I open all the subVIs, otherwise the secondary address isn't picked up and I get a EARG and ENOL error in NISpy and a GPIB write error in the Error Out cluster.
I have attached an example of a NIspy capture of a failed attempt.
Attachments:
Capture.spy ‏9 KB

Hi,
EARG (4)
Error Condition: Invalid argument to a function call.
Description: EARG results when an invalid argument is passed to a function call.
Possible Cause: The following are some examples: you call ibtmo with a value not in the range 0 through 17 (possible timeout values correspond to a table of values ranging from 0 to 17, where the default is 13, which represents a 10 second timeout); you call ibeos with meaningless bits set in the high byte of the second parameter; or you call ibpad (or ibsad) with invalid addresses.
The reason you are getting the error is because not only is your secondary address invalid, but your primary address is also invalid. Lines 14 and 16 of your attached NI-SPY capture set
the primary address (ibpad) and secondary address (ibsad) respectively. You need to make sure that you are passing the addresses properly to the subVIs using a connector. It seems like your programming when sending and receiving data (like the addresses) from your subVIs is not correct. You have to be sure to pass the data back and forth in the proper method using connectors.
A.S.
Anu Saha
Academic Product Marketing Engineer
National Instruments

Using One Property Node For Multiple Controls/Indicators

Question for all you LabVIEW gurus. Is there a way to create 1 property node that is used for multiple indicators? For example, if I wanted to display the same value on 10 different indicators using the property node - value function do I need to create 10 separate property node-value instances for each indicator? Or is there a way to tie all of those indicators to only one property node?
Thanks!
Solved!
Go to Solution.

Hi hobby1
You could create a cluster, and inside in it put all the indicators, see the image attached
Attachments:
capture1.JPG ‏14 KB

Can you change the vi color background using a property node?

I was wondering if it was possible in Labview to use a property node to change the front panel background color for one iteration and then back to an original color afterwards. I dont think it is possible but would like to know for sure.
Thanks,
Jody
Jody M.
The Procter and Gamble Co.
Certified Labview Developer
Currently using LV2012.
Solved!
Go to Solution.

Yes you can
That's how you change it, you will just have to put some logic to change it back
CLA, LabVIEW Versions 2010-2013
Attachments:
FP color.PNG ‏4 KB

Can i use iphone6 in greece with a nano sim from vodafone?

can i use iphone6 in greece with a nano sim from vodafone?

See above From what I can see the Thai carriers lock their iPhones and do not unlock
If it came from direct from Apple in Thailand then it should be unlocked
Borrow a sim from a different carrier to yours and see if it gives service

Use of property nodes together with embedded remote panels

Hello,
In the LV RT 6.1 release notes is a point under 'known issues'
You can programatically change the properties of front panel controls
and indicators in LabVIEW by using Property Nodes on a block
diagram. Similarly, when you target, or connect, LabVIEW RT to the
RT Engine on an RT Series device, Property Nodes affect the front
panel of the RT Development System on the host computer. However,
if you disconnect the RTDevelopment System from the RT Engine and
subsequently reconnect it, you must reset the properties for them to
take effect on the reopened front panel. The same applies to embedded
remote panels.
I did not found the same in the LV RT 7.1 release notes. Does this still apply to 7.1?
My problem is that everything done using property nodes behaves strange. For example setting scale offsets, multipliers, maximum and minimum is working well if the front panel is displayed in the web browser during the call to the property node. If the web page containing the front panel is reloaded the scalles get messed up.
Also clearing the history of a chart seems not to work.
Is there a workaround for this. Reseting properties as mentioned in the 6.1 release notes does not work with embedded remote panels since there seems to be no way to detect remote connections in labview.
Regards, Beat

For your reference.
I have been doing this since then
Ian F
Since LabVIEW 5.1... 7.1.1... 2009, 2010
依恩与LabVIEW
LVVILIB.blogspot.com
Attachments:
ClusterCTRLPropertyNode.jpg ‏54 KB

How do I use the Index Values property node with a multidimensional array.

I am using a 2D array to store operator inputs on my front panel. I only want to display one element to the operator at a time. I am trying to use the Index Values property node to change the displayed element. However, I can only get the Rows index to work. How do I direct the Columns index as well? The help says to use one per dimension. I need clarification on what this is talking about. I've tried adding a second element to the property node, 2 seperate property nodes, and diferent wiring techniques. (series, parallel)

If you only wire up one of the inputs (col or row) what you get out is a 1D array of either the column or row. If you wire controls to both, then you will get one element out of the array. Getting a single element in a 2D array requires you to specify both a row and column.
Message Edited by Dennis Knutson on 02-08-2007 08:34 AM
Attachments:
Index 2D Array.PNG ‏2 KB

I don't know how to use the property node to get information out of my sub vi while it is working.

I had a question answered earlier about passing information out of a sub vi, and was helped out. The problem is that I don't understand what is happening as I can not reproduce the results. I am now trying to take results of a comparison (true-false) and pass that back out of my sub vi. I tried a property node and to connect a refnum control to it in the sub vi. Then I tried to connect an indicator to its terminal in the main vi, but was unsuccessful can someone tell me how and why, step by step, to pass this information out. Starting with the point of information in the sub vi to the indicator in the vi. I would appreciate any help that you could give m
e.
Attachments:
Pass_a_Reference.vi ‏15 KB
GL_Flicker_mod.vi ‏77 KB

Step by step:
1. On your main vi Front Panel, create your boolean indicator.
2. On the block diagram, right click the new boolean indicator and select Create - Reference.
3. On sub-vi front panel, create boolean indicator (or use one that is already created).
4. On sub-vi front panel, create a reference (Controls Palette - Refnum - Control Refnum).
5. Right click on the newly created Refnum and select Select Vi Server Class - Generic - GObject - Control - Boolean. The refnum label changes to BoolRefnum.
6. On sub-vi block diagram, create Property Node (Functions - Application Control - Property Node). Find the BoolRefnum and move it close to the new Property Node.
7. Wire the BoolRefnum to the reference input of the property node.
8.
Right click on the property node and select Change to All Write.
9. Move mouse to point to Visible inside property node box, left click and select Value.
10. Wire the boolean indicator from step 3 to the Value input of the property node.
11. On sub-vi front panel, right click on icon and select Show Connector.
12. Click on empty connector spot then click on the new BoolRefnum. Save your sub-vi.
13. On main vi block diagram, connect refernece created in step 2 to the new connector terminal of sub-vi.
14. Save and run.
Here are the modified vi's.
- tbob
Inventor of the WORM Global
Attachments:
Pass_a_Reference.vi ‏20 KB
GL_Flicker_mod.vi ‏83 KB

Example of how to modify a control using a property node

Hello, I am new to labview and I would like to be able to modify a front panel control in the block diagram. From reading up on this I realize I need to use property nodes but I am having a hard time getting this to work.
I would like to have select action ring change from Hard Reset to Idle when the loop finishes running. I think I am on the right track but at this point I am stuck and an example of how to do this would be greatly appreciated. The VI is attached.
Attachments:
eps_state_machine.vi ‏20 KB

No, LabVIEW is EASY!
All you need is write to a local variable if the control.
I assum you want to reset whenever the loop iterates. If you only want to reset after the loop finishes at the end of the run, you would do it in a sequence frame after the loop.
Some notes:
your shift register is completly useless, because the carried value is never used by your code.
Your idle case spins the main loop at an infinite rate, using all CPU while not doing anything useful. (place an indicator on the iteration count to see.
Use an event structure to spin the loop only if it needs to.
Here's a quick draft:
Message Edited by altenbach on 06-26-2008 01:07 PM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
eps.PNG ‏18 KB
eps_state_machineMOD.vi ‏20 KB

Help comparing the value of a button using the Property Node (I get a variant)

Dear Sirs:
(I'm using LabView 6. I guess the solution is different for 6.1)
Currently I have created an array of Boolean RefNums (which point to many, many buttons). When I need to know when any (and which) of the buttons was pressed I just compare every element on the array with the constant TRUE. It fact, as the array is built from RefNums, I should compare the VALUE from the Property Node.
The problem here is that the Property Node for this type of Boolean is a LV Variant, and I need to compare this with a TRUE/FALSE value.
I tried to convert the TRUE constant to a LV variant and visc. But nothing works... I always get that none of the buttons was pressed.
Here it co
mes the question: "How can I compare the value of a Property Node for a Boolean (Button) with a TRUE (or False) constant?"
BTW, maybe I should explain why I'm using RefNums instead of the direct values: As my project requires tons of buttons, I would preffer using RefNums to refer to them. (I.E. I could use a single VI that takes the RefNum and formats the button to hide it for certain users).
I have enclosed a VI that contains what I've achieved until now, which is nothing
I appreciate your time and help.
Best regards,
JAVIER VIDAL
Attachments:
Other_Main_Menu.vi ‏103 KB

Javier,
There is another problem in your code: the booleans are not polled by the main loop so they will remain false until the user presses them again. This renders the boolean latch action useless.
What you can do is to change the mechanical action of the booleans to non-latch. When you detect a "true" in the polling loop, set the boolean to false again. One added benefit is that once all boolean are non-latch, the value property won't be a variant but a boolean so conversion is no longer needed.
LabVIEW, C'est LabVIEW

When i change the value of a combo box using a property node it displays the value not the item label

I am using a combo box as a select list for text serial commands. I have items like "engineering", "GUI", and "Scan" for the commands "MDE", "MDN", and MDS respectively which i have input as the corresponding value in the combo box. so for example the label "engineering" has the value "MDE" in the combo box items list. when the Vi starts it needs to read the current value MDE, MDN, or MDS and then i want it to display on the front panel the item text corresponding to that command value.
To do this i have tried to read the serial command, ie MDS and then wire that to a "value" property of a property node of the combo-box, but instead of displaying the corresponding item label, "Scan", it displays the value "MDS" on the front panel instead. i want the front panel to use the label text when choosing and displaying but the block diagram to use the serial commands. Can this be done with a combo box? I'm trying to use a combo box so i can keep it all text and avoid having to build a case statement to convert enums or rings from a numerical value to the text command.
The correct text value is wired to the value property and it does exist in the combo-box. I have unchecked "values match items" and selected to not allow undefined values.

Don't use the value property node. Use the Text.Text property node. When creating the property node, select Text, then in the next pop-up box, select Text.
- tbob
Inventor of the WORM Global

Using code interface node with dll crashes LV 2011 but not LV 8.6... using max error handling does nothing

Hi all,
I'm having a peculiar problem.
I inherited a project saved in LabVIEW 8.6. The project must use of particular dll that was built a few years ago. The original developer and source code for this .dll are long gone. The very core logic exists, in the form of embedded C code, and that's it. The .dll is called through a Code Interface Node in LV 8.6 and this setup manages to "work". Howver, running the VI that calls this .dll in LV 2011 causes an "insta crash", as in, no "program has stopped responding". Error message pops up, then all LV windows close.
It's very similar to that described in here:
http://digital.ni.com/public.nsf/allkb/D84C9775ABD921CF8625772A005CA50C
but this KB says to try putting the amount of error handling to maximum. I tried that, but it didn't help.
Using the "Debug" option allows me to run the just-in-time debugger with CVI 2010, which then proceeds to say this:
Finally, I manage to get this out of it:
FATAL RUN-TIME ERROR: Unknown source position, thread id 0x000012D4: A non-debuggable thread caused a 'General Protection' fault at address 0x00000000.
I don't think that really helps at all, but it's there.
Here is the function prototype of the .dll:
void _inputPM@224(uint8_t arg1, uint16_t arg2, uint8_t arg3, float arg4, float arg5, float arg6, float arg7, float arg8, float arg9, float arg10, float arg11, float arg12, float arg13, float arg14, float arg15, float arg16, float arg17, uint16_t arg18, uint16_t arg19, uint16_t arg20, uint16_t arg21, uint16_t arg22, uint16_t arg23, uint16_t arg24, uint16_t arg25, uint16_t arg26, float arg27, float arg28, float arg29, float arg30, float arg31, float arg32, float arg33, float arg34, float arg35, float arg36, float arg37, float arg38, float arg39, float arg40, float arg41, float arg42, float arg43, float arg44, float arg45, float arg46, float arg47, uint16_t arg48, uint16_t arg49, uint16_t arg50, uint16_t arg51, uint16_t arg52, float arg53, float arg54, float arg55, float arg56);
(never seen a function take 50 input params like that (wouldn't you use a struct? array? something? But I digress, and I don't know anything about .dlls...))
I do have a ".lib" and a ".cdb" file with the same name as the .dll, but those also looks like some kind of compiled file.
I'm sure the answer I'm going to get is that there is no way of telling what's really going on without .dll source code. I'm hoping against hope that there may be another way or hack.
Any ideas? Thank you for you help.
Regards,
Mark G
Solved!
Go to Solution.

MarkCG wrote:
Changing the call library node to stdcall (WINAPI) did the trick! No more crash. Thank you very much!
I haven't run LV2011 on windows XP, only on windows 7, so I don't know if that makes a dfference. But The call type makes no difference when using LV 8.6 on the same machine, however.
Now I've got to make the .DLL run corretly on a compact fieldpoint.... and avoid crashing IT.
Thank you for the help all!
Well, the DLL did work fine in LabVIEW 8.6 because earlier versions of LabVIEW automatically proceeded to change the calling convention to stdcall, if they noticed a function name decoration of @# (# = number of bytes passed on the stack) appended to the name. This is the default naming decoration for stdcall functions used by VisualC. However this decoration can be overwritten with linker switches, other compilers don't use them always in the same way, and most likely there are in the mean time compilers out there that can produce such decorations also for non stdcall calling convention. So this automagic trickery was removed from newer LabVIEW versions.
I do think it could be considered a bug in the code that upgrades LabVIEW VIs, that it uses the calling convention that is configuerd in the dialog, instead of the calling convention earlier LabVIEW versions used automagically, but it is an esoteric corner case.
What Compact Fieldpoint controller do you have? If it's anything newer than 20xx or 21xx forget it. The 22xx controllers use a PPC CPU and VxWorks operating system and can never get a Windows DLL to operate properly. If it is a 20xx controller it's still highly likely that DLL can not even get loaded into LabVIEW as it likely relies on other runtime libraries and possibly Win32 APIs not present in the Pharlap ETS runtime kernel used on those controllers.
There is a tool to check a DLL for incompatible imports that are not present on specific ETS RT systems. And this list summarizes the RT system used on the various NI controllers.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Cant use DVI-D port with DVI-D cable from Pav 500-100a to HP W2207 monitor

I have a new Pav 500-100a factory standard with no mods. A HP w2207 monitor.
Currently connect fine with VGA to the DVI-D port with the adapter that came with the pc. I've setup Windows, updated to 8.1, put in my files from my old PC and all was well except video isnt that good.
I got a DVD cable form work but its a DVI-I cable. It took 5 mins before windows comes up and then whenever the background picture changed in the theme it hung for a few seconds. I read that I need a DVD-D cable which i purchasd today.
The packet says its a CL-DVI2M - DVI M/M 24+1 CABLE 2M. The tech in the shop says its a good calbe and will work fine.
When connected and I power up I get teh hp logo and rolling dots then it goes blank.
I reconnect teh VGA cable and its all fine - using the VGA to DVI adapter.
I ran msconfig and turned of safe boot - restarts and comes up fine in safe mode. I set the resolution to 1280x800 and restarted and reconnected the DVI cable - blank again.
If I put the VGA cable back in it boots fine. The monitor has been factory reset and seens the DVI connection but Windows remains blank. Also tried booting first with no cable - connect teh DVI and the monitor remains in sleep - power reset teh monitor and still blank also shows no DVO conenction.
I fI power up with DVI connected I can get to BIOS, and i see the HP logo and dots as Win 8 starts.
I dont know what else I can try. I have no other usable video card with DVI
Any ideas out there?
Pls help - Steve
Although I am an HP employee, I am speaking for myself and not for HP.
This question was solved.
View Solution.

Hi Steve,
Only connect one active video cable to the monitor and do not use any adapters.
Use a flashlight and examine the DVI connector on the monitor. Which DVI type is it?
Some of the older HP monitors have DVI issues so you might want to check with HP Support and see if you have one of those models.
An older post a long time back indicated that audio also had to be feed to the monitor (claimed by a poster). If this is indeed true then it's a monitor design flaw. So, you could use a native HDMI cable and test out that claim.
HP DV9700, t9300, Nvidia 8600, 4GB, Crucial C300 128GB SSD
HP Photosmart Premium C309G, HP Photosmart 6520
HP Touchpad, HP Chromebook 11
Custom i7-4770k,Z-87, 8GB, Vertex 3 SSD, Samsung EVO SSD, Corsair HX650,GTX 760
Custom i7-4790k,Z-97, 16GB, Vertex 3 SSD, Plextor M.2 SSD, Samsung EVO SSD, Corsair HX650, GTX 660TI
Windows 7/8 UEFI/Legacy mode, MBR/GPT

How can I change the precision of a numeric array indicator using property nodes ?

I want to change the precision of a numeric array indicator programatically using property nodes. I tried to see all the array properties but I couldn't find it. URGENT !!!

If you want to change the precision of an element in an array you must first get the reference to the array element. Then raise the reference to the more specific class of a digital numeric. Use a property node connected to that reference to set the precision. See the attached vi for an example.
Brian
Attachments:
ArrayElementPrec.vi ‏27 KB

I'am having problem with a graph property node by using format & precision

I would like to display an amount of data in a waveform graph and to choose the X scale to display absolute time (whitout date information) or scaled decimal value.
Absolute time is a must because the scaling should reflect the acquisition time and not only a value in hour, minute and second.
Using the property node I can choose between 10 differents formats (0-Decimal, 1-Scientific, 2-Engineering, 3-Binary, 4-Octal, 5-Hexadecimal, 6-Relative Time, 7-Time and Date, 8-SI, and 9-Custom).
Format 7 - Time and Date should be a good choice but LabVIEW set automatically system time AND system date without any possibilities to change anything.
Trying format 9 - Custom ends everytime with error 1077 (invalid property value).
Any help to explain me how to use the format Custom or to give me a solution to switch between time (no date) and decimal scaling is appreciate.
Thank

In addition to the Xscale.Format property node, you also need to set the XScale.FormatString (see a little below the Format entry).
Use %<%.0X>T as format string.
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...

Use blinking property node with a pipe indicator from Automation Symbols toolkit

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