how to use a control instead of indicator?

[nejla]

I have the program written and i'd like to change the indicators to control in order to be able to control the rate myself. Ofcourse it gives me bad wire when i do that. is there anyway i can do that with adding something so it wouldn't give me bad wire?

[lopez]

Nejla,

I am a new user myself and have had this problem. I have found that you need to find what your rate is currently controled by and then replace that control with one of your designation. an indicator can not be changed to a control if there is already a function or other device controling your desired output.

hope that helps a little.

lopez

[Ames]

Nejla,

Always remember that Controls = Inputs and Indicators = Outputs. So if you change an indicator into a control then the wire is no longer giving the indicator a value it is now getting the value from the control. This is why the wire will break. You need to change the logic behind your program so that it is looking at the control (your old indicator) as a input and not as a output.

Ames
Applications Engineering
National Instruments

[JaredA]

Hello,

As you are probably aware, the difference between controls and indicators is that a control corresponds to an input and an indicator corresponds to an output. It is not possible to wire an output to a control because a control does not have an input to be wired to.

If all you want to do is change an indicator to a control and then wire it to an input, you can simply right-click on the inidicator and select Change to Control. If you want to take advantage of Local Variables, you could right-click on the indicator and select Create >> Local Variable. Using a Local Variable, you could change it to Read, such that you could then have an pseudo-indicator that has an output that you can wire to an input.

If you want to control the rate, then you will
have to determine if this is a settable attribute, and then wire a control to the input.

I hope this helps.

Jared A.

[nejla]

hi,
Thanks all for answering my question 🙂
let me explain it more, maybe i have a wrong idea, and maybe you guys can give me some hints and better ideas?
i am using the code for a chamber who reads the temperature and controls it then.( heat it and cool it down many times for testing)
the original chamber that the codes were written for is used for testings in lower temperatures and lower rates. but now that i wanna use the same codes for this new chamber(Sun chamber) i have to make some changes to give it this ability to go higher on temperature and also go higher faster(rate). (for testing)
do you guys have any suggestions how i can do this?
thanks
nejla

[JaredA]

Hello Nejla,

What you want to do is change different attributes that are unique to your specific FieldPoint system. If you go into MAX, and browse through your FieldPoint system, you will see different use settable settings. You can change advise rates, channel configurations, ranges, etc.

If you want to use the same code, but just change these certain things, what you will want to do is locate where these settings are originally set, and change them there. A good resource that you will for sure want to use is the FieldPoint manuals. The manuals can provide insight as to what settings can be set and what some valid ranges are.

Let me know if you still have questions after looking through some of this information.

Jared

[nejla]

Hi Jared,
What is MAX? what do you mean by MAX?
thanks
nejla

[JaredA]

Hello Nejla,

Sorry for the accronyms, I guess I'm just use to it. I apologize.

MAX is the Measurement and Automation Explorer. It should get installed on your machine when you installed National Instruments software.

Does that help? Let me know.

Jared