35
ABB i-bus
®
KNX
Project design and programming
Reaction on DALI or EIB / KNX bus voltage recovery:
It is defined with
this parameter how the output channels or DALI devices react if the KNX
supply voltage, the operating voltage and the DALI control voltage are
restored. (The DALI equipment must be supplied with voltage).
If the supply voltage of the DALI devices should only be available at a later
time, the current brightness of the associated channel is set within 1 second
following recovery of the supply voltage.
The reset of the ballast fault is carried out after a maximum of 45 seconds.
This time is dependent on the number of DALI devices that are connected
to the channel.
Reaction on communication fault:
It is defined with this parameter how
the DALI output channels or DALI devices are set if voltage is present
but no monitoring communication telegram with the value “1” has been
received via the communication object “Telegr. Communication receive”
within the defined receiving interval. The time span of the receiving interval
can be set in the
Status
parameter window under “Transmission / receive
period”. If no “1” telegram is received during this period, the DALI Gateway
adopts a safety state. The connected DALI devices can be parameterised
in the following way:
• “no change” (channels retain their brightness value, any started timer
operations are continued)
• “turn on value” (all channels are set to the starting value)
• “max. brightness value” (all channels are set to the maximum dimming
value)
• “min. dimming value” (all channels are set to the minimum dimming value)
• “Off” (all channels are switched off)
The DALI Gateway does not process any telegrams until a “1” telegram is
received again via the communication object “Telegr. Communication receive”.
Channel reaction on ballast or lamp failure:
To enable the maintenance
personnel to find the channel with the faulty lamp or ballast easily,
the reaction of the output channel or electronic ballast in the event of a fault
can be defined.
Note: The fault can also be an interruption in the supply voltage
to the ballast.
Burn in lamps:
Continuous dimming of lamps which are not burned in can
lead to the maximum indicated brightness of the lamp not being reached
and thus the required brightness level in the room cannot be set.
To guarantee the optimum life expectancy of the lamps and the correct
function of the electronic ballasts and lamps in the dimming state, many
lamps (filled with gas) when they are first used must be operated for
a specific number of hours at 100% brightness before they can be dimmed
continuously.