Honeywell TR80UWD Installation And Operating Manual page 23

System Architecture 3 (TR80 Modbus Slave to Room controller and DALI64 on
Sylk bus connected to Room Controller)
In this Architecture the controller act as Modbus Master for TR80(Modbus salve).
DALI 64 is connected on Sylk port of the controller. User light commands are polled
from TR80 by controller and Transmitted to DALI64 over sylk bus for execution. The
controller also regular checks the light status/level from DALI64 periodically on
sylk bus and updates the TR80 registers with current status. The Shutter/Blind
User commands(level and/or Angle) are polled from TR80 are polled by controller
and executed via digital outputs.
16 TR80 - Installation and Operation Guide