Staircase Lighting Time - ABB i-bus KNX Product Manual

®
ABB i-bus KNX
4.3

Staircase lighting time

© 2008 ABB STOTZ-KONTAKT GmbH
Planning and application
With the active staircase light function the other additional functions of
the device are deactivated, with the exception of forced operation and
block function.
When the telegram value 1 is received on the object Switch, the lighting is
switched on. After the staircase lighting time T
in s [0...65,535]) has elapsed, the lighting dims in an adjustable dimming
time T to a defined brightness value ("Base brightness"). If this value is
D
zero, the lighting switches off after the minimum dimming value is reached.
The parameterised dimming limit values defined in the parameter window
apply.
X: Dimming
During an activated staircase lighting function the preset and scene
commands have no effect.
After bus voltage recovery the staircase lighting function is activated.
The lighting state remains unchanged: If the lighting was switched on,
the switch on brightness value is set and the lighting is restarted. If the
lighting was switched off, the brightness value switches to the basis
brightness.
The dimming time T relates to the minimum dimming value or the basis
D
brightness, depending on the value that is reached first. Using this logic
the light is always dimmed for the entire prewarn time T
a sufficiently long warning before the staircase light is switched off.
Base brightness = 0
T
ON
%
Dimming value
Brightness behaviour with basis brightness = 0
Base brightness x %
T
ON
%
x%
Dimming value
Brightness behaviour with a basis brightness not equal to 0
T = duration of the staircase lighting function
ON
T = dimming time (prewarning)
D
(parameter time duration
ON
T T
D
T T
D
, in order to provide
D
T
ON D
t
T
ON D
t
105