Hammerstein identification model problem

[andy22]

Hi, I have a problem with system identification. I am using User-defined model an Hammerstein Model Simulation for identifying "unknown" system. I used LabVIEW example that works fine and I copy it to my VI. System identification is wrong but I don't know why. I can post a an image of VI or eaven VI itself if the problem could be solved. I must also mention that for data acquisition I use OPC client. Thank you.

[Jennifer_R]

Hi andy22,

If I understood your post, you are using example code that identifies your system correctly.  However, once it is integrated into other code the results are wrong.  Are you using the same data in both programs?  You mentioned that the data is from an OPC client.  How is that being read in LabVIEW?  Have you verified that those values are correct? 

If you could provide a few more details, possibly with code or screenshots, that would help as well.