Flow Diagrams for LabView Projects

Hi!
What techniques should I follow to develop a flow diagram for one of my labview projects?
Thanx

What an open ended question! I could find no documents that I thought would answer your question. You might find them useful however:
Linear Systems in LabVIEW
Event-Driven Programming in LabVIEW
NI offers classes for LabVIEW. You might find of of them useful. www.ni.com/custed

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Hello Everyone,
I have been coding LabVIEW for about 2 years now, off and on as my company requires it, and although my coding abilities and neatness have improved greatly since I first started I still end up with large, messy looking programs.
I have a great understanding of SubVIs and use them regularly and often. I am also familiar with the various code structures such as a producer/consumer or state machine. But I keep finding that too much of my main code is interdependent on common variables, indexes, and values that it seems impossible to simplify any of them into subVIs because I would need like 10+ inputs or a custom cluster for each one. This seems counter productive and time consuming.
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AaronMcCollough wrote:
I have a great understanding of SubVIs and use them regularly and often. I am also familiar with the various code structures such as a producer/consumer or state machine. But I keep finding that too much of my main code is interdependent on common variables, indexes, and values that it seems impossible to simplify any of them into subVIs because I would need like 10+ inputs or a custom cluster for each one. This seems counter productive and time consuming.
I can reduce my program to 3 while loops. One captures Events and gives commands on a queue, another takes those queued items and performs actions, and the third performs data gathering, plotting, and saving once each second. This starts out good, but by the time I've incrementally added all the features my company requires, each loop is a huge interconnected mess of wires with no clear way to section them up into subVIs.
Do you try to identify related information that can be used by a whole set of related subVI's? For example, you might have several parameters related to a specific piece of hardware. These can be grouped into a typedef cluster (or, even better, an object with all the related subVIs part of the object class). You definitely don't want to be using custom cluster for each subVI, but well designed subVI's shouldn't have more than a few custom inputs once related information is grouped.
As for data in the loops, I usually just have one big cluster in a shift register. This is never itself sent into a subVI, but parts of it (the typedef clusters or objects from above) are unbundled and sent into subVI's. It's basically just serves as a cleaner way of holding all the parameters. I'll attach an image of a "state" of the program I'm now working on. There are only a few wires unbundled in each individual "state", even though the full cluster (the top shift register in the image) has 20-odd components (and some of them are subclusters/objects that themselves have many components, such as the "Selected Record" object in the image which itself is a 15 element cluster).
BTW, I'm using the "JKI state machine toolkit" which you might want to look at to get some ideas.
-- James
Attachments:
Code example.png ‏45 KB

FieldPoint devices and LabVIEW program for educational project

I use LabVIEW 7.1 and NI FieldPoint devices (FP-1000) for educational
purposes. I want to control a automation unit which has got 6 digital
input(DI) and 5 digital output(DO). I used the sequence structure, but
actually I am not sure the solution whether true or not.
Working principle of my system:
If "Channel 1" DI is ON, DO Channel 10 must be "ON"(turn table motor
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If Channel 3 DI is ON, DO Channel 12 will OFF, a bit of delay time DO
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If Channel 4 DI is ON, DO Channel 13 and Channel 11 will be OFF (drill
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If Channel 2 is ON again DO Channel 10 will OFF and check cyclindir
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This is a pneumatic technical experiment set. Your suggestions okey
but I have already studied these subjects.I have tested a solution for
the system using the sequence structues in the LabVIEW. But if you
sent to me an example vi, I will understand the solution way.Thanks.
Working principle of my system as a summary:
Step 1: When DI 1 is ON, DO 1 must be "ON"(turn table motor
Start) while DI 2 is ON. In this case DO 2 must be "ON" (drill motor
Start) and after a bit
time delay DO 3 will ON (drill motor down),
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that DO 4 will ON ( drill motor upper position) in this case DI 4 is
ON, after that DO 1 again ON while DI 2 is ON (like step 1)
On 27 Ocak, 21:40, tst <[email protected]> wrote:
> Your description is not particularly clear.
> For example, what happens if DI 1 and 2 are True at the same time? Is DO 10 T or F?What's the difference between the DI 2 at the beginning and at the end? And so on...
> As a start, I suggest you try searching this site and google for LabVIEW tutorials. <a href="http://cnx.rice.edu/content/col10241/latest/" target="_blank">Here</a>, <a href="http://zone.ni.com/devzone/learningcenter.nsf/03f7c60f17aad210862567a..." target="_blank">here</a>, <a href="http://www.mech.uwa.edu.au/jpt/tutorial/index.html" target="_blank">here</a>, <a href="http://www.iit.edu/~labview/Dummies.html" target="_blank">here</a> and <a href="http://www.upscale.utoronto.ca/GeneralInterest/LabView.html" target="_blank">here</a> are a few you can start with and <a href="http://www.fafiles.com/" target="_blank">here</a> are some tutorial videos. You can also contact your local NI office and join one of their courses. In addition, I suggest you read <a href="http://zone.ni.com/devzone/conceptd.nsf/webmain/CB5E46406090C61C86256..." target="_blank">the LabVIEW style guide</a> and the LabVIEW user manual (Help>>Search the LabVIEW Bookshelf).
> To get more details about might be relevant for this case, try searching for "state machine" and look at the examples in the File>>New dialog.

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i recently switched to archlinux from ubuntu.there is ubuntu there was tdfd for creating Data Flow Diagrams but i am not able to find any alternative for archlinux.
Could anyone suggest me the software to be used.
Thanks

Pratgeek wrote:i recently switched to archlinux from ubuntu.there is ubuntu there was tdfd for creating Data Flow Diagrams but i am not able to find any alternative for archlinux.
Could anyone suggest me the software to be used.
drcouzelis wrote:
rp181 wrote:Can't find the program u are talking about though.
I can't find it either. Pratgeek, what was the name of the application you used in Ubuntu? Is there a website for it?
probably a kind of necrobump, but i've been searching for flowchart drawing software, and found this topic.
well, mentioned tdfd is the part of software suite called TCM available at least in debian/ubuntu.
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Flow Diagrams for LabView Projects

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