Hello All, I am a Senior Mechanical Engineering Technology student working on my capstone project. I've been working for a few weeks to get this program right but have had a hard time. I spoke with a person on the phone for help but I guess asking more than one question per phone call is looked down upon, so here I am hoping to get some help. I'm way more familiar with programming with Visual Basic and C++. My capstone involves a series of 4 force transducers that are being used to weigh a five gallon bucket filled with weights. This is not the only part of the project, but the program for this whole thing is what I need help with. The use of this device is for a spaghetti bridge contest where the bridges are tested. I'm trying to get to the point where I have 2 programs that can run the transducers, first a stand-alone readout, which I have completed and it works very well. I would like to have the second program, which I am currently working on, allow me to operate the final test fixture at the competition as a user interface rather than a simple readout. I'd like to be able to select a school out of a scroll menu. Then when weight is placed in the bucket my standalone program operates as a subvi which outputs the weight. The weight is then displayed on the user interface program. When I click record load, I would like that load to be sent to a file, and the display to be frozen so the weight readout will not change until the trial is complete. Next, I would like to be able to click a pass or fail button according to if the bridge held the weight applied. All of this information would then be sent to a text file for final competition results. I'm going to attempt to attach the user interface program as it sits. I've got a lot of my user interface set up. Looking at it you will notice a constant 5 that goes to the concatenate function, which represents a load... but in the future will be the input of the subvi. Currently the program writes continuously to the file. I know this has to do with my loop structures but I'm not sure what the best order or method to achieve my goal is. Therefore, I need help with the following: - Writing to file once per trial using the user interface setup If not much comes of this, I do plan on reconstructing the way it operates using a flat sequence... which would first select a school, then record weight, then pass or fail, then write to file... or along those lines. Maybe that would work... I'm not looking for someone to do the work for me, I'm just hoping for some assistance in getting this thing operational. I'm in a crunch because the competition is March 20, or 7 days from now. Thanks in advance for your help. Message Edited by HiddenTalent on 03-12-2010 09:31 AMMessage Edited by HiddenTalent on 03-12-2010 09:32 AM

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LabVIEW

What table are you referring to?

Tables require an input of a 2D array of strings, not just a single string.

So you would need to build your output of your subVI into an array.

I would recommend using a shift register to do so.

Cory K

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