ABB i-bus KNX Product Manual page 89


ABB i-bus KNX
Commissioning

Block: The communication object Block is available for the lighting group. The Block function 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 is set after the block is lifted. A block during a dimming up or down
process or scene operation interrupts the dimming process and freezes the current brightness value.
A block during the Staircase lighting or Controller function leads to an immediate blocking of the
lighting group and freezing of the brightness value. After unblocking, the Staircase lighting function
continues with dimming (prewarning). If light control or slave operation were active before the block,
they will be re-established. Forced operation has a higher priority than the Block function. With
activated Forced operation, the Block function 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 communication objects only have a meaning in conjunction with the
Staircase lighting function:

Staircase light. permanent ON: The communication object Staircase light. permanent ON is available
for the lighting group. The Staircase light. permanent ON function 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 infinite and the lighting group is switched on with the brightness value
for the Staircase lighting function, see
reaction of the operating functions, e.g. Dimming, Set brightness value and Scene recall remains valid
even when Staircase light. permanent ON is activated. The reaction as parameterized in the
parameter window - Gx Staircase lighting applies. An OFF telegram causes dimming to the basic
brightness. If a telegram is executed, Staircase light. permanent ON is deactivated (reset). With the
deactivation of Staircase light. permanent ON, the dimming phase of the staircase lighting is initiated.
After the basic brightness has elapsed, the Staircase lighting function is in standby and Staircase light.
permanent ON is deactivated.
Note
Forced operation and Block have a higher priority than Permanent ON. After the end of Forced
operation or Block, the staircase lighting is started with the dimming down phase and Staircase light.
permanent ON is deactivated.
For further information, see:
Parameter window - Gx Staircase
Staircase lighting, page 167
lighting, page 94. The
DLR/S 8.16.1M | 2CDC 507 100 D0202 87