53
ABB i-bus
®
KNX
4.4.2 Behaviour
on voltage recovery
The 8-fold KNX DALI gateway, DG/S 8.1, interprets a failure of the operat-
ing voltage of the DALI devices as a fault of the electronic ballast, since the
DALI device does not reply anymore. Once the operating voltage is restored,
the electronic ballast is switched on with maximal brightness (100%) as
it is requested by the manufacturer. After 1 or 2 seconds, the “recovered”
electronic ballast(s) will be set to the brightness that the user has set for the
corresponding channel. An explicit parameterisation in the DALI gateway is
not provided.
Recovery of the operating voltage
On recovery of the operating voltage on the DALI Gateway, the green
operating LED lights up again.
The behaviour of the DALI Gateway and the connected DALI device on
recovery of the operating voltage (supply voltage) of the DALI Gateway
cannot be parameterised directly.
As a recovery of the operating voltage simultaneously leads to a recovery
of the DALI voltage, the behaviour of the DALI devices can be defined in
the parameters. The parameter “Reaction on DALI or EIB / KNX bus voltage
recovery” in the
General
parameter window is available for this purpose.
The following options are available for the DALI outputs: no change, turn on
value,
maximum and minimum dimming value or Off.
The communication object “Telegr. Fault 230 VAC” can be activated in the
Status
parameter window. Depending on the parameterisation, the fault in
the operating 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 object
“Fault Acknowledgement”. Only then 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
deactivated after voltage recovery. The previously elapsed time is lost.
Project design and programming