controll fans with cDAQ 9172

[pollon]

Hello 
   First of all i'll like to thank you for the interest, anyway i have a very big problem because it's my first time i try to program something.
we just buyed Labview 8.5 and a NI cDaq 9172 with four modules: NI 9211 for the thermocouples, the NI 9263 for output voltage, the NI 9481
(i think a relay module) for controlling our two DC electric fans, and NI 9215 for input voltage.
 i have to controll the fans with a limit temperature gaved me by the thermocouples. when the temperature of one thermocouple reaches a known
temperature one fan must stop and the over must start, and so on. we have to make a cycle.
the controll may be a while loop and the reaction must be immediately. I'll be the only person to use this system and the setpoint needs to be
adjustable if possible.
we use thermocouples type k with the NI 9211, and each fan has it's thermocouple to controll it. we need to use two fans because our project was
made this way.
Thank very much for your help and your time.
 Paul Hanga

[AndreaN]

Hi Paul,

in LabVIEW 8.5 there are plenty of examples you can take a look at.

That's the best way to learn and start practicing with this powerful software.

To search trough out the many examples you need to click on the "help" tab from LabVIEW Block Daigram or Front Panel.

Select from the menu "Find Examples" and you will be pointed to the Example Finder.

Look in the "Hardware Input and Output -> DAQmx -> Analog Measurements -> Temperature" folder; you can look at "Cont Acq Thermocouple Samples-Int Clk. vi".

At the same way for the fan control you can go in the folder  "Hardware Input and Output -> DAQmx -> Analog Generation -> Voltage" and you can  practice with a lot of VIs.

Regards,

Andrea N.

[pollon]

Hi, thank you so much for your help. bye