I am quite new at tags but have no issue creating basic tags. One thing that I struggle with is the MINRAW and MAXRAW values.

From what I was taught if the MAX is 20000 and the MIN is 4000 then the conversion should be 16000 and you set the DZero=4000. I honestly have no idea what those numbers mean but I know that when it is set this way no one yells at me.

so where I have trouble is with the negative numbers. Today they want me to create new tags with values like this. MAX 300 MIN -300 or MAX 1000 and MIN -100. Can someone explain to me the proper way to calculate this? if I do a calculator and try 1000 minus -100 it does not seem to compute. What should be the correct way to compute these negative numbers?

Hi Calvin'

If you are looking for data conversions then request you to check below link

PI Interface for OPC DA

Thanks,

Lal