ABB i-bus EIB Mode D'emploi page 31

Operation
When the bus is energized the UP watchdog switches
on the lighting system irrespective of ambient
brightness. This ambient brightness level will only be
detected after a period of about 1 minute.
The mode of operation is selected on the unit via slide
switch (Fig. 1, Item 2). As per basic parameterization
the following applies:
• left = ON
• right = OFF
• center = Automatic operation
Center position (automatic operation) can be
safeguarded via screw located on the back of the unit.
The unit can operate in automatic mode only if the
slide switch on all UP watchdogs arranged in parallel is
in center position (secure by means of screw).
If the bus voltage has been switched on and one of the
units is changed over from automatic to the ON or OFF
operating modes via slide switch (Fig. 1, Item 2), all
other UP watchdogs arranged in parallel will also enter
into this operating mode via software control.
= UP watchdog out of service
permanent light switched on
= UP watchdog out of service
light switched off
GB