Initializing Control Inputs to default value.

This may be a stupid question, but I am new to labview. When the VI is started I want it to read the data from the PLC(via the OPC Server)initially to set up the controls default value. Then if the user wants to change it, they can type a new vlaue.
Currently every time you start labview in clobbers the data in the PLC with its default value. I thought of using a write on change tag, but then it doesnt show what the current set point is.
Thanks
Thad

If you wanted to get the PLC values before makeing any changes to them, I would recommend using a Tag Read and update your front panel control with the use of a local variable. This would be an initialization routine.
Another possible answer to your question is that you will want to use the Options >> Make Current Values Default selection on your Front Panel. This way anytime your VI is reloaded it will start with these default values.
Thanks,
Bryce

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XML FORM - How to save read-only controls with a default value

Hello everybody,
I have a 3 xml forms, each one to create one type of news. I need to use 3 because each of this forms has their own controls. But the control which indicates the type of news (asociated with a KM Predefined Property) must be common in the 3 forms, in order to use it on searches.
The question is, how can I include in this forms a control:
- Visible for the user
- With a default value defined in the control properties (each form has a different value, corresponding with the type of news)
- Read-only mode
- The value showed in the control must be saved in the associated KM Predefined Property when the user clicks the Save button.
Anyone knows how to do this?
What control can I use?
I was thinking of trying with text boxes, but I don't find the way to make them unwritable (Read only mode).
It is posible using labels?
Thanks.
Kind regards

Hello Jose,
I know you responded with a question... I see it in the email, but I don't see it here! Very odd... but in response:
The first thing I do when I open the Edit.xsl file is do a 'find' for the name of the text field that I want to be read-only (in my test case, it's 'location'). Repeat the find until you see something like:
[code][/code]
Below there is where I put the new code. Mine looks like this:
[code]- <xsl:choose>
- <xsl:when test="location='' and ($editmode='create')">
- <xsl:choose>
- <xsl:when test="./xf:ValidationError/@tagname='location'">
- <input name="location" size="30" type="text" class="urEdfiTxtEnbl" id="field_1157467268006">
- <xsl:attribute name="tabindex">
- <xsl:choose>
<xsl:when test="$accessibilitymode='true'">21</xsl:when>
<xsl:otherwise>3792</xsl:otherwise>
</xsl:choose>
</xsl:attribute>
- <xsl:attribute name="value">
<xsl:value-of select="''" />
</xsl:attribute>
- <xsl:attribute name="readonly">true</xsl:attribute>
</input>
</xsl:when>
- <xsl:otherwise>
- <input name="location" size="30" type="text" tabindex="3792" class="urEdfTxtEnbl" id="field_1157467268006">
- <xsl:attribute name="value">
<xsl:value-of select="''" />
</xsl:attribute>
- <xsl:attribute name="readonly">true</xsl:attribute>
</input>
</xsl:otherwise>
</xsl:choose>[/code]
I put the <xsl:attribute name="readonly"> in both places (when test, and when not test). I'm not entirely sure if that's necessary, but that worked for me.
Hope this helps,
Fallon

Urgent: Table control validation of defaulted values

Hi All,
I have 5 fields in my table control. I have provided a button on the screen, if the user clicks that button, one of the fields( checkbox) is set as 'X'.
Now , I want to validate the value in this field.
The issue I have is that it is not going into the CHAIN ENCHAIN module logic to do the validation, if the value is updated through the button, but it performs validation if I update the field manually.
Please advice.
Thanks.
K K

Try this in the PAI process of screen:
LOOP AT itab.
    CHAIN.
        FIELD: ...
        MODULE CHECK_MODIFIED ON CHAIN-INPUT.
    ENDCHAIN.
ENDLOOP.
Oherwise,you can add the check logic into the flow logic of the button,if the value is not valid,block it.
Edited by: Liang Zhang on May 28, 2008 4:34 AM

Programitically Reinitialize Specific Front Panel Controls To Default Values

Hi everyone, I know I can re-initialize "all" controls to their default values using an Invoke Mode. How do I re-initialize only specific controls I want to re-initialize to their default value? Basically, I want to re-initialize all the controls except for one control. I want to do this during run-time of the VI.
Thanks so much!

In your situation, I would probably just reinitialize all and then immediately set the value of that one control. Your alternative is to use the Reinitialize Value method for each and every control except that one. You could do this in a FOR loop easily enough.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

Setting control to default value when it is a strict type def

If my subVI has a control that happens to be a strict type defined cluster and I have saved the values in the control as the default values, how can I change them back to the default values of the type def (which are empty). Because it is a strict type definition, i cannot click on the elements inside the cluster and modify them (e.g. click on an array inside the cluster and do an empty array operation.)
In the attached screenshot, the control "BLE Meters To Test" is just an array of clusters and I was able to empty the array. The control "Capture Data" is a strict type def. I would like to clear the contents of this control without having to delete the control and add it back with a new instance of the same strict type def.
Solved!
Go to Solution.
Attachments:
screenshot.PNG ‏33 KB

are you talking about edit mode or run mode?
You could temporarily add a second instance of the typedef (all empty), then change it to a constant. Whenver you need to reset at run time, write the new digram constant to a local variable of the control.
glstill wrote:
Because it is a strict type definition, i cannot click on the elements inside the cluster and modify them (e.g. click on an array inside the cluster and do an empty array operation.)
Make sure to click on the array container, not on the array elements.
LabVIEW Champion . Do more with less code and in less time .

Set Default Values on Purchasing Scheduling Agreements

Good day All.
I need to ensure that the Confirmation Control Key(EKPO-BSTAE) , Unlimited Over delivery indicator (EKPO-UEBTK), Creation Profile (EKPO-ABUEB) and Jit indicator (EKPO-FABKZ) is automatically updated with default values when a scheduling agreement is created for a specific purchasing organisation. Please advise if this is possible via config (SPRO).
Many thanks, Yumna
Edited by: Yumna Abrahams on Aug 10, 2011 2:58 PM

Hi,
To set default values for screen painter parameters initialize the field names with default values in the PBO module....
say u have the field name as f_field1....
in the PBO of that screen initialize it....
f_field1 = '100' "here 100 is the default value.
<b>reward points if useful.</b>
regards,
Vinod Samuel.

Default value of BeX customer Exit variable not Displayed in WeBI??

Hello Experts,
We are stuck with a problem where WeBI report is created on top of BeX query and we are not able to see the default value of Bex Customer exit variable in WeBI run. Here is the complete scenario:
1. One restricted KF is created in BeX, restricted with Customer exit variable on net Due date. And this variable is mandatory, ready for input, and Default value in calculated is user exit as current Week's Monday.
2. So, by default KF data should be restricted to Monday of current week, if user does not change this value.
3. Now, WeBI report is created on top of this Bex query, and all is working fine, i.e. we are getting variable as Prompt in WeBI, but Default value is not shown while Running the Webi Report.
So, need your inputs on the same, if default values from BeX in WeBI is supported or not? If yes, why this is happening, and how to resolve it?
Please notice, the restrcition is in KF only, it is not a separate restrcition on Net Due date in Filter area or in Defualt area of BeX
and we are on SAP BW 7.1 and BOXI 3.1 SP4.
Regards,
Vipul
Edited by: VIPUL GOYAL on Nov 23, 2011 9:44 PM

Hi,
See 1285993 - Support of Customer Exit Variables from BEx query into WebIntelligence via OLAP universe
WebI will prompt when executed, but the default values calculated by the user exit - do not appear.
Note: If the BEx variable has property 'ready for input' set / enabled, then its WebI prompt shows ok, but no default value appears.
Cause
This behaviour expected 'by design' (in the context of the product's current limitations) as explained in the online guide below:
Please refer to Chapter 7, page 44, document link here: http://help.sap.com/businessobject/product_guides/boexir3/en/xi3_sap_olap_universes_en.pdf
Characteristic variable > processing type > Customer Exit is "Supported, without user entry"
--> This should be understood as meaning "User will not be shown a prompt"
regards,
H

How to set default values on the screen painter parameters?

Hello ABAP Gurus,
I would just want to ask how to set default values on the screen painter parameters.
Thank you for your replies.

Hi,
To set default values for screen painter parameters initialize the field names with default values in the PBO module....
say u have the field name as f_field1....
in the PBO of that screen initialize it....
f_field1 = '100' "here 100 is the default value.
<b>reward points if useful.</b>
regards,
Vinod Samuel.

Effect of Mass Compile on VI default values?

Does a mass compile during upgrade from one version of LabVIEW to
latest version cause default values of VIs to be reset? Here and
there I set front panel defaults so I can easily do standalone testing
of the individual VI. Furthermore, there are times I keep the
defaults for actual application use.
Don

A mass compile should not affect control and indicator default values.
-D
Darren Nattinger, CLA
LabVIEW Artisan and Nugget Penman

How to set the current month as the default value of an input control?

Hello,
I want to set the current month or current year as the default value of an input control. Something like try to get the month from the currentdate() formula and assign it to the input control.
Is this possible?
Thanks & Regards
SU

>
soauniverse wrote:
> Hello,
>
> I want to set the current month or current year as the default value of an input control. Something like try to get the month from the currentdate() formula and assign it to the input control.
>
> Is this possible?
>
> Thanks & Regards
> SU
I don't think so. I tried to find a property or something in that Input Control but there is nothing to set it that way.

Not allows to assign default value to input field using values in datastore

Hi Masters,
Consider that I have one input field in a form. I should assign default value to it. I should assign to it, the value which i have stored in a datastore. When i run the application, if i give default value as 123 ,then it is working fine i.e., it is showing 123 in the textfield in form , but if i give the default value as STORE@ProductId, then it is not displaying that value in the form.
Please help me out.
Thanks & Regards,
Kaushik Sreeram

Hi,
i faced this problem and here's what i concluded:
There's no way you can set default value for input field dynamicly, since the default value of input control is caculated only once (i think on initializing of the iView). The input control and the data store are initialized at the same time, STORE@productID is empty that time...
If you don't need to recieve value through the input field you're trying to initialize, but just to display the value from the store - I suggest you try using another control - Expression Box. It's value is calculated continiously, just like the Label's, and you can refere to it later.
Regards,
Yulia

How to set default values for inputs?

I have several inputs which are always initialized with 0 when I start the VI. I'd like save own default values for them. I've already tried just setting the numbers and saving the VI but it did not work.

If you want to make any data in any controls, Arrays you can right click on it select >Data operations>Make current values default or you can select EDIT in tool bar, click on Make current values Default.
First, enter the data you want in the control or array and then follow the things Geeta said.
Post if any other help required.
Message Edited by mathan on 12-05-2008 12:07 AM

NaN as default value for LabVIEW numeric control

TestStand 2010 SP1, LabVIEW 2011 SP1
This may be a "feature" but I also may be missing something here.
Reproduce my issue doing this:
Create a VI with a numeric double. Set the value to NaN. Make that the default value. Connect it to the connector pane. Try and call it from TestStand. The prototype will not reload. Why? NOTE: it only works for controls and not indicators.
Not sure if it's related to this because that's in .NET: http://forums.ni.com/t5/Measurement-Studio-for-NET/NaN-as-default-value-for-a-numeric-edit-control/t...
We have hundreds of VIs with the default set to NaN. We started seeing this issue when we just upgraded to the latest dev suite.
Thanks in advance,
jigg
CTA, CLA
teststandhelp.com
~Will work for kudos and/or BBQ~

The prototype reloads fine in TestStand 4.2.1 and LabVIEW 2010, as you probably already knew.
In TestStand 2010, the problem is that it doesn't reload only when you set to NAN? Or does it never reload no matter what the numeric value is?
What is your logic for using NaN values? Are these values that are not used in tests? We have a suite of over 50+ tests and I have never used NaN values as inputs.
Thanks,
PH

Default value for a column in Table Control

Hi friends, can i set dinamcally a default value for a column in table control?, this column is check type. This default value must appear in empty rows,
thanks

ADD A MODULE AS Module yyyy In ur PAI.
as
In PAI.
LOOP at itab.
Module YYYY
ENDLOOP.
Module YYYY.
LOOP AT SCREEN.
    IF SCREEN-NAME = 'ITAB-VAL.
      ITAB-VAL = 'XXXXXXXX'        "(DEFAULT VALUE)
      SCREEN-INPUT = 0.
      MODIFY SCREEN.
    ENDIF.
ENDLOOP.
End module.
*note
make this event work only if the previous column is filled okay.
the display will be in display mode on the screen as screen-input = 0.
see that in the table control u can get the table field for all the rows even though you are processing on some fields .
so what u do is make that particular filed masked(no i/p field and populate the field that will be better instead of populating all the columns okay.
hope this helps you out ,
regards,
vijay.

Programmatically determine control default value

Hullo,
I'm trying to figure out a reasonably supportable method for detecting whether a sub VI's input is wired.
I'm using the approach of setting a nonsensical default value for the control, then comparing the control's current value to a constant of this value. If they're not equal, then I pass the control's value into my shift register. If they are equal, I retain whatever value was previously in the shift register. In this instance, I've created an action engine that allows me to update status and progress bars.
This works because my progress counter is a U8 which I will only ever write 0-100 to, so I can set my default to something outside this range (here, 255) for my comparison. Something similar should be relatively simple to understand and reuse in the future.
However, there's a dependency on someone setting the default value for the control and then updating the comparison constant to match. My question: is there a method for checking the default value of a control programmatically in order to remove the coupling? I realise that any method would invariably be slower in terms of execution, but this is merely out of curiosity.
CLD
Solved!
Go to Solution.

Thanks tst.
I was thinking more of future expandability and use rather than maintenance.
The default value method works for any input for which you can define a default value, so it can be used for anything your imagination stretches to. This may be a trivial example, but I can foresee someone in the future copying the architecture and ignoring the documentation.- but that's my problem, not anyone else's!
As I mentioned, it was mostly out of curiosity rather than an actual wish to use it. I'll have a look at the default value via scripting for posterity, but if you were going down the scripting route you could also use the Terminal Checker method. This doesn't work in the RTE either, though.
Thanks again!
CLD

Initializi​ng Control Inputs to default value.

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Initializing Control Inputs to default value.