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ABB i-bus
®
KNX
5.4
Facility Management
58
Application and planning
One of the benefits of the DALI standard is the detection and reporting of
ballast and lamp faults. This information can be displayed directly or routed
to a control unit in order to arrange the appropriate maintenance or service
procedures.
The current status of the lighting system is monitored continually or can be
queried if required at any point.
Lamp and ballast faults can be detected per channel with the DALI-Gateway
DG/S 8.1. It must be taken into account that the exact lamp in the channel
cannot be monitored (see lamp fault 2 in the diagram). If each lamp should
be monitored individually, only one DALI device is connected per channel
(see lamp fault 1). This however, is normally not necessary. In most cases,
it is sufficient if the group or strip of luminaires in room or corridor is known,
in order to send the maintenance personnel to the correct place with the
appropriate information. The faulty lamp is then detected directly
on site and can be replaced without a commissioning process.
A fault acknowledgement can be set. This means that the fault signal is
only reset once the fault has been acknowledged manually. Otherwise,
the DALI Gateway automatically resets the error signal once the fault has
been rectified (replacement of the lamp or ballast).
Lamp fault 1
Visual fault display
on a control unit
Fig. 31: System representation of a fault signal
Lamp fault 2
Acoustic/visual
display
Fault ack.
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