Sheesh. Been doing the Zebra or Sato serial port thing. You would think there would be and EthernetI/P version already from one of the big manufacturers or have I just not found it yet.
I haven't come across any that are ethernet/IP yet however this does not mean they are not available. I have however used serial to ethernet converters with barcode scanners in the past.
Call Real Time Automation They have a serial to EIP adapter that doesn't require any special setup in the PLC just write to a tag in tHe PLC and point the RTA adapter to that tag. I don't do serial anymore without one of these. If you count your time at $0.00 an hour you would still be money ahead to use one of these adapters.