[crf]

what is a common procedure to implement communication for third party tools into a robot program?
What I want to do:
call macro writeHello(data="hello world") -> now "hello world" should be transmitted to a slave via Modbus, Ethercat, Io link,....
Is it possible to write macros for communication with external devices or how is this normally handled?
In my case I'm using a Fanuc R-30iB Mate Plus Controller.

Thanks!