54
ABB i-bus
®
KNX
Project design and programming
KNX bus voltage recovery
The behaviour of the DALI devices on recovery of the KNX bus voltage can
be defined via the parameters. The parameter “Reaction on DALI or
EIB / KNX bus voltage recovery” is available for this purpose in the
General
parameter window. The following options are available for the DALI outputs:
앫
no change, turn on value
앫
maximum dimming value
앫
minimum dimming value
앫
Off
The information about DALI faults, ballast and lamp faults which have
occurred during the KNX voltage failure is routed after KNX bus voltage
recovery.
Scenic courses of the dynamic operation stop with their current brightness
value and will not be resumed after the recovery of the operating voltage.
The connected DALI devices assume the status that was parameterised
after the recovery of the bus voltage.
DALI voltage recovery
On DALI voltage recovery, the yellow DALI fault LED is extinguished.
The behaviour of the DALI Gateway and the connected DALI devices on
recovery of the DALI voltage can be parameterised.
The parameter “Reaction on DALI or EIB / KNX bus voltage recovery” is
available in the
General
parameter window. The following options are availa-
ble for the DALI outputs: no change, turn on value, maximum and minimum
dimming value or Off.
The communication object “Telegr. Fault DALI” can be activated in the
Status
parameter window. Depending on the parameterisation, the recovery
of the DALI voltage of the channel is automatically routed via this object or
via a read request.
If the fault acknowledgement is activated, the fault signal remains set until
the fault is rectified and the fault signal is reset via the communication ob-
ject “Fault Acknowledgement”. After the acknowledgement a telegram with
the value “0” is sent via the corresponding communication object. This can
be very helpful when detecting sporadic errors or events which take place
during unmanned monitoring periods.
The function of the burn-in time is lost on bus voltage failure and is deacti-
vated after voltage recovery. The previously elapsed time is lost.