setpoint

[IBI]

I am programming an autoclave (an oven for composite), it must have setpoints as input. I dont no how to make setpoints. The version i use is Labview 6. For more information i hav make a .doc file.

[Sean_C.]

Hello IBI,

Thank you for contacting National Instruments.

To simulate the signal you require, you can use the Build Waveform function found under All Functions >> Waveforms.

Attached is a VI which builds the signal you require.

I hope this helps.

Sean C.
Applications Engineer
National Instruments

[IBI]

Thank you very much for your post

But i can't control the time, i need two inputs one for time (real time) and one for the value.

For an example; after 15 min the temperature have to be 100 degrees, one hour later the temperature have to cool down to 50 degrees. I can create a chart or waveform but if, i give this as an input the machine (autoclave) sees only the last value and not over time.

I hope you can help me
Gulpinar, I

[Sean_C.]

Hello Gulpinar,

If I understand your problem correctly, you want to output a varying voltage signal to control your autoclave.

You can do this with a sequence structure. Set up a DAQmx task to output a voltage for a specified amount of time. After that time has elapsed, output a different voltage in the next frame of the sequence structure. Before stopping the task, set the output voltage to zero. Otherwise, the voltage will stay at the last value.

In my example, I generate a signal that is at 10 Volts for 3 seconds then switches to 5 Volts for 2 seconds before returning to 0 Volts. If you want your voltage to ramp from value to value, more coding will be necessary.

I hope this helps.

Sean C.
Applications Engineer
Nationa
l Instruments

[IBI]

Thank you very much,