Setting up Digi One Sp and Markem Printer

Hello, Any ideas would be greatly appreciated!

I am trying to set up a Digi One Sp as an interface between a Markem 5200 and a Compact Logix PLC. I have not used this product and I am having trouble getting this configured. The Markem only allows a serial connection and the PLC will be an ethernet connection.

The Markem requires an input string requesting what is basically a status.

So I need to send a string from the PLC to the Markem and then read the string that is returned.