ABB 6996 Instructions De Montage page 38

Addressing of the switching / shutter
actuators
1.1.1.19
Each module must have an unambiguous address (1-3)
in order to guarantee unambiguous assignment of
switching and shutter actuator modules to the control
chip (dimmers do not need to be addressed since all
dimmers connected to one data line are controlled
synchronously). The modules should be addressed in
the order in which they are connected to the control
chip (module 1 = address 1, module 2 = address 2,
...).