Micrologix 1400 has a DFI port can do rs232 to Mettler Toledo IND560
Use this RS232 high impedance cable between them. Black Box EMN04A-1000. Good up to 500 feet.
I believe Rockwell has a typical code library for bringing in asc2 data.
I think people have done the ethernet interface but not sure if its reliable versus the rs232.