ABB i-bus KNX Product Manual page 85


ABB i-bus KNX
Commissioning

Block: The communication object Block is available for the lighting group. The function Block is
activated by a telegram with the value 1 and deactivated with the value 0. The lighting group can be
blocked using this communication object, so that it cannot be changed via the bus. The current
brightness value of the lighting group is frozen. All telegrams with the exception of forced operation
and the reactions to KNX bus voltage failure and recovery are ignored. Incoming telegrams are
processed in the background. Dimming processes are not simulated in the background. The value
calculated in the background will be set after the block is removed. A block during a dimming up or
down process or scene operation interrupts the dimming process and freezes the brightness value at
the current level. A block during the function Staircase lighting or Controller function on the other hand
leads to an immediate blocking of the lighting group and freezing of the brightness value. A block
during the function Staircase lighting or Controller function on the other hand leads to an immediate
blocking of the lighting group and freezing of the brightness value. After unblocking, the function
Staircase lighting continues with dimming (prewarning). If lighting control or slave operation were
active before the block, they will be re-established. Forced operation has a higher priority than the
function Block. With activated forced operation, the function Block can be activated or deactivated. In
this way, the current blocked state is available after forced operation as would be the case without
activated forced operation.
The following three additional objects only have a meaning in conjunction with the function Staircase
lighting:

Staircase light. permanent ON: The communication object Staircase light. permanent ON is available
for the lighting group. The function Staircase light. permanent ON is activated by a telegram with the
value 1 and switched off with the value 0. With the activation of Staircase light. permanent ON, the
staircase lighting time is set to permanently on and the lighting group is switched on with the
brightness value for the function Staircase lighting, see
page 90. The behavior of the operating functions, e.g. Dimming, Set brightness value and Scene
recall remain valid even when Staircase light. permanent ON is activated. The behavior as
parameterized in the parameter window - Gx Staircase lighting applies. An OFF telegram causes
dimming to the basis brightness. An OFF telegram causes dimming to the basis brightness. With the
deactivation of Staircase light. permanent ON, the dimming phase of the staircase lighting is initiated.
With the deactivation of Staircase light. permanent ON, the dimming phase of the staircase lighting is
initiated. After the basis brightness is implemented, the function Staircase lighting is in standby and
Staircase light. permanent ON is deactivated.
Note
Forced operation and blocking have a higher priority than permanent ON. After the end of forced
operation or blocking, the staircase lighting is started with the dimming down phase and Staircase light.
permanent ON is deactivated.
For further information see: Staircase lighting, page 163
Parameter window - Gx Staircase
DLR/A 4.8.1.1 | 2CDC507128D0202 83
lighting,