Strings, Arrays, and Tables oh my!

[Fouzaan]

Hello all,

I'm running a test that detects when a device fails. Basically when a greater than comparison specific to a device evaluates to 1 I want to display that the specific device failed and what time it failed at. I've been reading up on strings, arrays, and tables and have an elementary understanding of them but I was wondering if anyone had any advice on the best way to implement such a system.

The table I want displayed would look like this:
   
Failure        Date/Time
1A               7/4/2008 6:30pm
1B               7/4/2008 7:00pm
4A               7/6/2008 2:00am

etc.

The devices are numbered 1-6 and each has either A or B. I suppose the Date and Time could be separate columns.

I was thinking of just building a string for devices and a string for the times and then using the 'spreadsheet string to array' function to create 1d arrays and then combining them before displaying to a table. Is there a better way to accomplish this?

[JeffOverton]

That's probably your best bet, although rather than use Spreadsheet String to Array (which would require you to delimit your data), you can just build them into a 2D Array and display that as a table or array.  Granted, this method uses two Build Arrays, one of which could grow infinitely, but I would hope you don't have hundreds of thousands of failures.

Message Edited by JeffOverton on 07-02-2008 03:27 PM

[MikeS81]

Hi Fouzaan,
if you have both strings separatly you can use the build array function.
Mike

[Fouzaan]

Thanks guys, I'll let you know if I hit any snags 🙂

[Fouzaan]

I'm stuck on how to get it to execute only once when a boolean goes from 0 to 1. When the change occurs I need it to update the array, but then not update again even though the boolean remains at 1.

[altenbach]

---

Fouzaan wrote:
I'm stuck on how to get it to execute only once when a boolean goes from 0 to 1. When the change occurs I need it to update the array, but then not update again even though the boolean remains at 1.

---

Use a shift register (or feedback node) and an "implies" logic.

See http://forums.ni.com/ni/board/message?board.id=170&message.id=226371&query.id=157732#M226371

[Fouzaan]

nevermind, solved the issue i posted about. 

Message Edited by Fouzaan on 07-03-2008 12:35 PM

Message Edited by Fouzaan on 07-03-2008 12:37 PM

Message Edited by Fouzaan on 07-03-2008 12:41 PM

[Ben]

Please "pull back the curtain" at let us know how you solved the problem (of the wicked witch). This will help the Dorthy's of the future find their way "home from Oz".

Ben

[Fouzaan]

I used the method altenbach suggested but he has a button inside the loop which changes the boolean shift register to true and keeps it true after the appropriate conditions are met. In my program I had dynamic data instead of a button so I had to figure out how to convert dynamic data to a bool. It took a bit of digging but I found the function that does exactly that. Once I was able to convert it altenbach's method worked perfectly.

[remerlin]

Sorry for the hijack but - BEN would you please contact me concerning SDLC communications under LV.

remerling@moog.com