How to use HART- 1st, 2nd, 3rd, 4th Parameter vaules in logic for calculation
We are using AI895 Module for connecting the HART instruments - MVT. The Instruments will give Pressure, Differential Pressure, Temperature , Compensated flow. We need to do the AGA calulation inside Freelance control builder F through logics. We are able to see the Values in FDT interface & also on OPC server(external Macthine) through OPC communication.
Now please tell that wether we can use these values(P/dP/T) inside the Process station for making logics.
if not what is the alternate solution for that?
the AI895 corresponds to the S800 IO family. this allows you only the 2, 3,4 th variable through FDT/DTM interface as you explained.
To get the 2,3,4 variable in the controller you would have to instead use the S900 IO family, this will alow you to get all variables and use them in the controller for AGA calculation.
Custom solution to get the values from the DTM interface to the controller is actually very complicated and unreliable. Not recommended to look for a solution this way.
So for these signals use the S900 IO instead.