temperature programming

[atulchemistry]

Hello Experts,

I have Watlow Ez Zone temperature controller for lab furnace heater. Its been succesfully connected to the computer and i can give the setpoint and read the process value in Labview.

But i need to add the program in labview in a such way that there will be different temperature for different time intervals.

e.g. at 200 C hold for 4 hours then

      go to 300 C and hold for 3 hours

      go to 400 and hold for 4 hours    and like that.

But i dont know how to start with that.

Please help me !

Best regards

Atul 

[ABCPrograms]

What you could do is using an array of clusters.

1) Create a cluster with 2 elements : Temperature ; Time

2) Create an empty array

3) drag the cluster into the array

Following you can fill out this array by the values you require :

200 hold for 4 hours then

300 hold for 3 hours

400 hold for 4 hours

After that you can apply this in a state engine.

As an example to get you started I set up a state-engine with some documentation, if you have any questions, just let me know

[ABCPrograms]

if the answer was the one you needed, can you please set you're post to solved

[atulchemistry]

Thanks for the information.

I have a question that where I can find the output(temp) from this sequence. Which I can connect to the setpoint reader of my previous program.

Thanks

regards

Atul

[ABCPrograms]

Can you explain what you're trying to do?  

[atulchemistry]

Well as i mentioned I have labview program for watlow furnace controller. I can give the temp setpoint and read the process values. Now how I can use the VI which you have sent me to connect to this program so that it will take the temp values automatically after specified time interval.

[ABCPrograms · Accepted solution]

Or you will have to modify your program, so you can implement mine into it

Or you can change mine so it does the stuff that yours does as well.

What you can do, is just before you send a new sequence to your furnace, you can read the process values from the furnace.

So create a new case in the state-engine : "read parameters", and in this case you can read your parameters.

I've adjusted the earlier VI, and added the new case.

[Bombercules]

Hi there, I am looking for help with the same problem but I cannot open the .vi because my labview is from 2009, would it be possible for somebody to post a picture or upload a compatible .vi? Thanks for the help.

[atulchemistry]

I will get back to you soon

[Bombercules]

It's okay I opened it with the 2010 version and converted it myself. Thank you for this program, it works very well.