Hey Ian,
Look in the "Macros" folder for you profile, (yes, I know, it doesn't make sense), at any rate in the macro folder.
you will see up to TWO files, depending on if you have serial or tcp or both modbus'es configured.
Here are the file names:
1). "ModBus.cfg" This is the Serial Plugin Modbus config file for your profile.
2). "TCPModBus.cfg" This is the TCP Modbus config file for your profile.
Once you have all your Modbus settings done (and varified to work), copy these two (if you use both serial and tcp), where ever you thing the
Giant Grey Space Ants can't break the molecular bonds of your files.......
Scott