One gateway SYS GW MODBUS(A) can connect directly up to 64 indoor units and 32 outdoor units connected in 8 refrigerant systems. Modbus RTU or Modbus TCP/IP protocol.
IDU Monitor: Error Code, Model, Indoor Temperature, On/Off, Mode, Fan Speed, Temperature, Mode Lock, Fan Speed Lock, Remote controller lock, Wired controller lock, Temperature limits, Swing Lock etc.