System Architecture - Honeywell TR80 Installation And Operating Manual

1.7 System Architecture

TR 80 wall module can act as Slave or Master in the Modbus communication net-
work. The various example of system architecture are as shown below:
•
•
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TR80 and DALI as Modbus Slave to Room controller
• In this example TR80 and DALI act as Modbus slave to Room Controller.
User light commands periodically polled from TR80 by controller and
Transmitted to DALI64 for execution. The controller also regularly checks
the light status/level from DALI60 periodically and updates the TR80
registers with current status.
The Shutter User commands(level and/or Angle) is polled from TR80 by
controller and executed via digital outputs.
TR80 Modbus Slave to Room controller on Port 1 and DALI as Modbus Slave
to TR80 on Port 2 (Direct Light Control).
• In this example TR80 acts as slave to controller. When DALI 64 is connected
to port 2 of TR80, then it act as master to DALI 64.
User light commands from TR80 are directly executed through DALI 64
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 DALI. Hence it is possible
for controller(as Modbus Master) to poll DALI through TR80 as repeater and
execute any light commands. However in case of direct command from
controller, the controller also need to read the light status and update the
TR80 registers. The Shutter User commands(level and/or Angle) are polled
from TR80 are polled by controller and executed via digital outputs.
TR80 - Installation and Operation Guide