@Ray thanks for the response to both of us.
It seems like (to clarify for me, and for anyone else wondering about a “monitoring only” application), one could create programs that run at the desired monitoring interval. E.g. every 4 hrs, every day, etc, that don’t connect to any valves. That would create a “logging window” that would tie to the observed overall flow rate. I.e. for keeping track off bills, etc.
And if one knew the existing the program on another controller, one could match the windows to see what those zones were actually running, too.
Thanks,
David