PID control without NI-DAQ device

[RTSLVU]

Using a proper programing architecture would help and a simple state machine lends itself perfectly to this

First initialize your instruments BTW: I am using an Agilent 34970A)

Then go to your Control state

Don't forget to shut everything down when you exit.

[vsci16]

Hi  GerdW,

Thanks for your reply.

The vi doesn't stop now, but it gives me a timeout error. I have attached a cop[y of the modified vi. Please do let me know what corrections I must make again.

thanks for your time

[AeroSoul]

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@RTSLVU wrote:

Nobody cares about seeing the voltage the heaters are being run at. That does not tell you at a glance how hard the heating/cooling system is working.

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You could always do something like this

Then you have throttle that goes from 0 to 100% and the voltage is still regulated in it's full range 0-120VAC.

[RTSLVU]

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@AeroSoul wrote:

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@RTSLVU wrote:

Nobody cares about seeing the voltage the heaters are being run at. That does not tell you at a glance how hard the heating/cooling system is working.

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You could always do something like this

Then you have throttle that goes from 0 to 100% and the voltage is still regulated in it's full range 0-120VAC.

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That's just dumb and takes twice as much code.

[AeroSoul]

[RTSLVU]

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@AeroSoul wrote:

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Nice and compact, but I believe that is still more code than this:  due to the two math functions and the formula node structure.

[AeroSoul]

Actually if you made PID range 0 - 120 and then multiplied output by 0.833 it'd be the same amount of code 😄