Honeywell TR80UWD Installation And Operating Manual page 22

System Architecture 2 (TR80 Modbus Slave to Room controller on Port 1 and
DALI as Modbus Slave to TR80 on Port 2 (Direct Light Control).)
In this Architecture the controller act as Modbus Master for TR80 (Modbus salve).
DALI 64(Modbus salve) is connected on Port 2 of the TR80(Modbus Master for
DALI64). User light commands from TR80 are directly executed through DALI64
connected on Port 2 of TR80 and new status is also updated automatically by TR80
without any intervention required from controller. The TR80 also act as repeater for
direct commands from controller to DALI64. Hence it is possible for controller(as
Modbus Master) to poll DALI through TR80 as repeater and execute any light com-
mands on DALI64. However in case of direct command from controller, the control-
ler also need to read the light status form DALI64 and update the TR80 registers.
The Shutter/Blind User commands(level and/or Angle) are polled from TR80 are
polled by controller and executed via digital outputs.
TR80 - Installation and Operation Guide 15