Thanks everyone. been bench testing & looks like N7:256 is as high as the AB 1100 can count. As well as not being able to use a floating point. I think the best plan is to use a separate counter that resets just after midnight. Also some sites on this project have two flow meters. So if I can count each pulse (1000 gallons each), going to see if I can store 90 days using the data logger or the FIFO. That would be 180 registers. Anyone have input on which one to use? All sites are remote/radio, will only be able to use Wonderware to read values no AB/RSLogix licences available for the desktop.