Lookout server modbus data collection question

[AndrewHuynh]

Is there any way to determine how many bytes of data I am polling over an individual Modbus station in a month time frame? Can I run it through the Modbus statistics and calculate?

[Mike@Forshock]

Setup a serial tap to via the messages over a set time frame and calculate the requirement.

Counting the good/bad frames may not help, modbus messages can vary in size/length from 1 register/coil to hundreds, even thousands (coils).