I have seen the RS485 Operator within the documentation , but I have no real example for it. I just did some succesfull testing on this operator some years ago and it was working as expected having 3 states.
( https://docs.baslerweb.com/vis…are%20Platform.RS485.html )
But there are also some other ways of serial communication possible.
RS232 for example can be done with the naticv GPO and GPI's operators and it only requires a voltage level adoption from TTL to RS232 configuration.
I will ask within R&D if there is some more documentation on the RS485 operator.