LG VRF systems to Modbus Interface. IntesisBox LG-RC-MBS-1 (INMBSLGE001R000) allows monitoring and control, fully bi-directionally, all the functioning parameters of LG VRF Air Conditioners into Modbus RTU (RS-485) networks.The gateway is wired directly to an indoor unit. This allows not only the control of the main AC functions such as operating mode, fan speed, temperature setpoint…but the monitoring of errors, alarms and some internal variable..