Whether KEPCO and Modbus RTU could execute at same time?

Inverter usually has only one RS485 port for control communication, the inverter now（2024-6-22） not support receiving the signal from 2 master devices( ex. 1 master for KEPCO and 1 master for Modbus RTU).

If there is 1 master device which support both KEPCO and Modbus RTU, this is possible that execute these 2 protocol at same time by only 1 RS485 port.