How many ways can I update a control programmatically???

1. local (or global) variables
2. property nodes.
3.
I'd like to know if there are more possibilities especially when a control is used. we can always right a value into an indicator when an indicator is used.

Ok, so the CLD could be a moving target. I posted these question in an email and now awaiting an answer.
What are the criteria used to grade the CLD exam? What are the specific finding and recommendations used when determining a grade?
In two instances of taking the CLD the graders comments are shown below.
After a comparison of the two cases, here are my comments. “Property nodes and local variable are not to be used”. I’ve posted a question asking what other ways are there to programmatically update a control. “Unnecessary bends in wires are not to be used”. What criteria determine when a wire bend is unnecessary? Should all wires not have bends thus bends in wires are not allowed? “Errors not handled….error terminal on property node not wired”. As I read the exam requirements, I did not come across a case to handle an error in any step. Simply connecting an error terminal and providing a case doesn’t handle errors. I’m almost certain my code in Case2 does not generate programmatic errors. “NOT gate used rather than inverted input where available”. Are you saying NOT gates are not be used, is there some advantage? Maybe I was able reuse duplicate code in Case2 and in one of the cases the NOT gate was appropriate since is read well on a block diagram and the change was effortless.
Case1:
Style: Overly complex solution. Property Nodes used to update values. Unnecessary bends in wires. Error terminals on property nodes unwired. Errors not handled.
Functionality: Application not fully implemented. Logic of implementation is not correct. Boolean latch action is not implemented where necessary.
Documentation:
Case2:
Style: VI is not modular – repeated code is not placed in SubVIs. Use of local or global variables. Unnecessary bends in wires. NOT gate used rather then inverted input where available. Errors not handled.
Functionality: Application does not function as specified.
I have no idea what NI is looking for as far as “Style”. Lets define this and have a point system in place for determining “Style”. What “Style” allocates 15 points in the CLD exam?

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I am designing a new test platform that will run on C# (because we like object oriented text based programming and because the IDE is free). For hardware we'll use your PXI modules (because your hardware is ultra-reliable). I'm starting with the following PXI modules 6259, 4072, 6509, 2575, and 2569, but we made add other modules later as future requirements demand. I am doing the system software architecture now. I've done some dabbling with Ni_daqmx, and I loathe "tasks" and "channels", but am determined to make them work.
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Dave,
Thanks for posting to the NI Forums.
For the good of the community we like to keep conversations that start of the forums on the forums rather than moving to email. If you want to move to email support I recommend contacting NI through the email route.
I will answer your questions here. If you need more direct contact please feel free to contact us through [email protected].
For some the concept of tasks may seem daunting, however, for many applications it makes life a lot more simple. A task at a very fundamental level is simply a collection of channels with a single type (AI, DI, DO, etc.) and a single timing configuration (sampling rate, continuous vs. finite, etc.). It is a way to organize configuration data.
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With very simple applications OO programming sometimes does not make sense. But as a program gets more and more complex OO programming becomes more and more useful. It takes some learning but it is worth it.
I believe the concept of a task does the same thing. It does not change the actual functionality of the device or add excessive overhead. It is just an abstraction that pulls configuration data about a specific "task" and methods the task can perform into a single logical place.
Unlike the entirely abstract concept of an Object, a Task is run on a physical device and therefore has physical limitations. You can create multiple tasks of the same type, but you can only run a one timed task of each type on a single board at a time. In other words you can have multiple AI tasks running at the same time but they need to run on different boards or only one can be timed (have a rate). You can also have multiple timed AI tasks configured for a single board but only one can actually be running at a time.
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