51
ABB i-bus
®
KNX
Project design and programming
4.4.1
Behaviour
on voltage failure
Failure of the operating voltage
The failure of the operating voltage on the DALI Gateway is indicated by
the green operating LED on the front of the device being extinguished.
The yellow DALI fault LED also remains switched off as no operating voltage
is available for triggering the LED.
The DALI Gateway can also be programmed and parameterised without
operating voltage via the KNX connection. Communication with the con-
nected DALI devices is not possible.
The communication object “Telegr. Fault 230 VAC” can be activated in the
parameter window. Depending on the parameterisation, the fault in the
operating voltage is routed automatically via this object or only via a read
request.
The 230 VAC fault refers to the operating voltage of the
DALI Gateway in general and thus also applies to a DC operating
voltage.
By means of the general communication object “Fault Acknowledgement”,
the acknowledgement of the fault signals can be parameterised i.e. both the
reset of the 230 VAC fault signal and the ballast, lamp and DALI fault signals
of the channels is possible.
The failure of the operating voltage means that the DALI power supply in
the DALI Gateway is no longer functioning. The communication to the con-
nected DALI device is interrupted. In the event of a failure in the operating
voltage in test mode, the mode is interrupted and must be restarted after
recovery of the operating voltage.
The behaviour of the DALI device cannot be parameterised directly when
the operating voltage fails. As a failure in the operating voltage however
simultaneously leads to a failure of the DALI bus voltage, the response of
the device can be set on the
General
parameter window via the parameter
“Reaction on DALI or EIB / KNX bus voltage failure”. The following options
are available for the DALI outputs: no change, turn on value, maximum and
minimum dimming value or Off.
Scene sequences or the dynamic operating mode are retained with their
current brightness value and are not continued after recovery of the
operating voltage. The connected DALI devices adopt the state which was
parameterised after bus voltage recovery.
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.
KNX bus voltage failure
If the DALI Gateway is supplied with AC or DC operating voltage, communi-
cation with the connected DALI devices is possible after an KNX bus voltage
failure. The manual test function of the DALI outputs (channels)
is possible.
The behaviour of the DALI devices can also be defined in the parameters.
The parameter “Reaction on DALI or EIB / KNX bus voltage failure” is availa-
ble for this purpose in the
General
parameter window. The following options
are available for the DALI outputs: no change, turn on value, maximum and
minimum dimming value or Off.
