How can I control a burkert valve 3280 by LabView?

[alhabeeb]

Hi,

I would like to know how to control a burkert valve

3280 H 8.0 FKM MS

G1/2 PN 6bar

24V C 12W

The valve is connected to a condenser, and I want to control it according to the outlet temperature by using NI 9474?

Thanks 

[santo_13]

NI 9474 is a switching card.

Your value is type "H," which means it needs a signal to represent the position as per the user manual.

For a Control value, the standard signal has to be one of the 4-20mA or 0-5V or PWM

So you need a different c-series card to control the 3280 value from LabVIEW or any language using the cDAQ.

DIP switch within the housing configure whether it responds to 0-5V signal or 4-20mA signal.

[alhabeeb]

Thanks for this info. I already run the valve by using two power supplies: 24V and 0-10V to control the opening area.

It seems to me that the DIP switch set to Set-point value input 0...10 V by default.

To control it by LabView, I think I need a module generating voltage instead of using adjustable power supply like I did to implement the electrical connection shown in the attached table. My questions is which model ("c-series card") in specific I could use?

Thanks

[alhabeeb]

OK. 

I used NI 9269, and it perfectly works. Now, how can I adjust the opening area (control the valve) according to a temperature measurement?

Thanks   

[santo_13]

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@alhabeeb wrote:

OK. 

I used NI 9269, and it perfectly works. Now, how can I adjust the opening area (control the valve) according to a temperature measurement?

Thanks   

---

If you're trying to maintain a temperature set point by adjusting the valve, you should probably adopt a PID control algorithm.

But, in general, you need to come up with the logic or map a temperature value to an equivalent value position value.

[alhabeeb]

Yes I should use PID control. May I have additional explanations about it? Is it required to read the output signal form pin 7?

Thanks 

[santo_13]

Any reason you need to implement this process control in LV instead of a dedicated PID controller?

Based on the manual, Pin 7 seem to represent the end position limit switch,

[alhabeeb]

Because I have to use LabView.

Thanks