I need to get the showing value from numeric indicator and then put that value to the numeric controller to show in another numerical indicator in LabVIEW.
Normally we can get the values from numerical control to the numerical indicator.I need the opposite of that.
As shown in picture need a method to get values that show in numerical indicator to the controller.
Use a Property Node (Value), it has the error lines, so it is useful for dataflow control.
You can use a local variable or a property node.
Local Variable
Right click on the control or indicator, from the shortcut menu choose:
create->local variable
Once you've created that local variable you can right click on it and change it to write or read local.
Property Node
Right click on the control or indicator, from the shortcut menu choose:
create->property node->value
You can then right click on the property node and choose 'change to write' or 'change to read'.
Property Node vs Local Variable
Either will work in most cases. Local variables will perform better, providing faster access to the value, similar to that of the control/indicator terminal itself. Property nodes do provide error terminals that allow for taking advantage of data flow and ordering your operations. If you already have a property node in use for that control/indicator, adding a value terminal may not impact performance, otherwise use a local, if you need to control order of operations use a flat sequence structure and pass your error cluster through the structure.
Related
I have a combo box in a grid. The form has a lot of tables (opened in init and assigned aliases). The grid has property
LinkMaster=EVENT
RecordSource is set to HEAT
The column in the grid has controlSource set to Heat.Event_no and the current control is CmbEvent. The CmbEvent control source is set to heat.event_no. Everything works as it should in the grid except...
When I select an item out of the combo box, the following code runs as a procedure called from the Click event:
IF event.relay
SELECT RELAY
GO TOP IN RELAY
SET ORDER TO
GO OrigRelayRec IN RELAY
....
The issue that I am having is that unless I am stepping through the code, the alias() never goes to RELAY. No matter what alias it starts on (usually HEAT), if I put a break point in at GO TOP, the alias() shows up as EVENT. The only way it ever gets to RELAY is if I step through the code.
Any thoughts on why Select alias isn't actually selecting the alias?
Usually in cases like this I set the focus to a control other than the grid. The problem is since the grid has focus it will always keep the alias selected that's bound to the grids RecordSource.
So right before your SELECT you can do something like "Thisform.cmdOK.SetFocus()" (it can be any control on your form other than the grid). That should do the trick.
I want to display multiple SubVIs (each one has a set frontpanel with controls and indicators) in my main VI. The problem is: usually only 2 or 3 are active at the same time, the rest are deactivated.
Let's say I got an array of VI references for the active SubVIs. Is it possible to display the SubVIs in a table, where each SubVI gets its own row?
I'm basically looking for a container similar to a Tab Control, but instead of tabs I want to display the VIs row-wise.
Thanks in advance.
The best choice for you is sub panels. http://digital.ni.com/public.nsf/allkb/D587067E18E0E70186256D44007B91FE
Example:
https://decibel.ni.com/content/docs/DOC-18164
Also there is nice way with xcontrols, but it is complicated and takes more time to implement. Anyway below is link about xcontrols:
http://www.ni.com/tutorial/3198/en/
I was unable to place a Sub Panel (which shows a VI's front panel) in an array control, but I was able to place it and its VI reference in a cluster, and then place that in an array:
After that, you could set the VI Ref's visibility to hidden, and tweak the array's chrome. Going further, I don't know if LabVIEW provides a way to give that subpanel a VI reference when it's in a container, so your mileage may vary.
Im just getting into using LabView and I ran into an error I can't seem to get rid of while working on a small sample exercise with the Bundle by Name Function.
Under here you can find my front panel, block diagram & error message displayed.
The output cluster is all indicators and all the items in the Enums have the same values, I don't know what I am doing wrong here. Can anyone help out?..
Thanks in advance!
Just delete your output cluster, than right click on bundle function and create indicator.
The problem is your output cluster order is other than cluster constant order.
Please read about type definitions and consider using them to avoid problems like this in the future.
Double check that your indicator and the cluster constant are actually the same type. A short cut would be to delete the existing control and just creat a new on by right clicking on the terminal of the unbundle by name and selecting create>>indicator.
Given the error message, I would say that it's because of the difference in elements order, between the constant you're giving to the Bundle, and the indicator wired to the output.
You can make sure of order consistency by right-clicking on the border of the cluster constant, and select AutoSizing -> Arrange vertically. This will order the elements, and to fix it you re-order by selecting Reorder controls in cluster in the same menu. Of course, you can also fix the ordering of the indicator.
When I am invoking slider.setValue() it changes internal field value but not graphical representation of slider.
How to move slider to given value from server side? (For example on button click or something like this. Value change is invoked from other component.)
I have set slider.setImmediate(true); and after changing value called slider.requestRepaint(); but this did not helped.
You may check its' parent components and also check for the component which invokes this method in its' listener.
I would think you should be able to define a label on a display method. However, I can't see it in the properties window. But there is a Best Practice Warning:
Control label is a copy of its display method label
So who can either tell me how to add the label or what this error message is really about?
The return type for the display method should be an Extended Data Type. On the EDT you should supply the label.
Each form control must have a label either inherited from EDT/Enum or explicitely set on the control. The label set on the control must not be the same as the EDT/Enum's label. I suppose in your scenario it is the same, and in order to get rid of this BP warning you should just clear the label in the control properties. If you want the label to be different you can change it in the control properties or in the Extended Data Type/Base Enum properties but then it will be changed everywhere througout the system.