Hey F.M. E
I have used the EATON XC152 PLC, basically interfacing RS485 with CAN 2.0A, for the danfoss displays but it also comes with RS232 , I would say that the only downside is that you need to know structured text or at least for me it was easier than other methods.
I tried some other gateways from anybus or so but for some reason I could not make it work.
I hope this helps
Regards