Update the command through Sub - VI

I have two digital controls on the front of my application I want to put up-to-date during the execution of a Subvi (to be precise, several screws under run the same second sub - VI, and I want the second sub - VI to update the digital controls). I found a few ways to do this, but I don't know which is better:

(1) a possibility to send references to the controls of the sub - VI, and that works fine except that it means that I need to wire references to several screws under and possible even more as I continue the development of the application.

(2) another option is using a static reference of VI, getting the property of façade, get the array of controls [], and then determine what clues are the controls I want (which looks like a horrible hack)

(3) I guess a last option is to use a global functional (or just an overall) to store a reference to the controls (which I have not really tried, but it seems like it should work...)

Is there a commonly accepted method to achieve this?

PS Digital controls actually get their functional values overall, so I need essentially just a way of saying to the face before reread the functional overall.

Two things:

(1) use a queue: place your controls on the front panel in a loop of reading their data to a queue (which allows the suspension pending data loop). Write to the queue within your 'second sub - VI".

(2) assuming you use LV 8.x, try shared network variables and binding controls on the front panel for them. Write new data to the shared variable of in your 'second' sub - VI, that the controls on the front panel will update automatically... no code required. I used this method with success but limited so that there is only one 'Publisher' (writer) to any shared variable network, but which allows for multiple "Subscribers" (readers).

These two work well because your orders of façade are updated when new data is available. No code turning continuously there are wheels "of the poll.

Tags: NI Software

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