DLL file problem in Labview 8.5

[0544771027]

Thank you all for trying to help me with dll issue.

I tryied to run the borland c++ example which uses the same dll and it worked just fine. 

The problem is that when i try to run the same dll with the labview example the call back library outputs the wrong number.

I think that this LV example was developed in the 7.0 or 7.1 version whyle i'm using the 8.2 version.

i was wandering if there is any chance that might be the cause of all problems? s ther any way to chek it ?

[Eli_S]

Hi,

From the information you have provided so far it is really difficult to determine what might be causing this problem. If you post your DLL (and source code if possible) and your VI, we might be able to reproduce the issue and figure out what the problem is.

[rashu]

how to open a dll file of iir cascaded filter  which is a inbuilt icon in lab view

kindly reply

[Peter_W]

Hi rashu,

I'm sorry but I'm having trouble understanding what you are asking, are these IIR Filtering VIs the functions you are asking about?

http://zone.ni.com/reference/en-XX/help/371361E-01/lvanls/advanced_iir_filtering/

Regards,

Peter W.

[rashu]

s sir,, the same what u told,, cascaded IIR filter. the same,,

in that internal  blockdiagram of cascaded iir filter there is a DLL file,, how to know whats inside that DLL file,,

kindly reply

waiting for u r reply

[Peter_W]

Hi rashu,

The IIR Cascade Filter (DBL).vi uses a Call Library Function Node to call lvanlys.dll, which is found in C:\Program Files\National Instruments\LabVIEW 2010\resource\lvanlys.dll. As far as what is inside of the DLL I don't have that information, but the function that the program calls is IIR_Filter2.

Regards,

Peter W.

[rashu]

dear sir,,

then how can i will know ,, how does that work,,

its very important for my project to know,, how does it filtrs the distorted signal, using the  fwd and rev coefficients.

can u plz guide me,,

i have tried all possible way,, but could not get it

[Peter_W]

Hi rashu,

As far as understanding how the functions work I would refer to the help topic I linked above for the Advanced IIR Filtering VIs. That will give you all of the information that is avaiable on the filtering process they use.

Regards,

Peter W.