L-DALI User Manual
269
LOYTEC
Version 5.2
LOYTEC electronics GmbH
OC_OCCUPIED is received and to unoccupied state when the value OC_UNOCCUPIED is
received.
This behavior is typically required if the occupancy information is only propagated if the
state changes (no heartbeat functionality). It does not allow using multiple occupancy (fan-
in) sensors without additional logic (e.g. an Occupancy Controller).
After the light has been switched off any updates on the
nviOccup
input are ignored for the
time specified in
nciIgnoreTime
.
8.2.8.7 Timing Parameters
To avoid that the constant light controller switches the light on and off repeatedly if the
measured lux value is near the setpoint, a hysteresis can be configured. The configuration
parameter
nciOffHysteresis
defines the hysteresis for switching off the lamp and the
configuration property
nciOnHysteresis
defines the hysteresis for switching on the lamp. In
addition a delay can be configured before the lamp is switched on (
nciClOnDelay
) or off
(
nciClOffDelay
). Figure 222 illustrates these configuration parameters.
Figure 222: Constant Light Controller Timing
8.2.8.8 Unoccupied Level
If the constant light controller enters unoccupied state (see Section 8.2.8.6)
nciUnoccupiedLevel
and
nciCLOffDelay
determine the behavior as shown in Table 24.
nciUnoccupiedLevel
nciCLOffDelay
Behavior
0
0
Dim down and switch off lights
> 0
0
Dim down lights to value defined in
nciUnoccupiedLevel.
0
> 0
Dim down to 0.5% and switch off lights after
nciCLOffDelay.
> 0
> 0
Dim down lights to value defined in
nciUnoccupiedLevel
and switch off lights after
nciCLOffDelay.
Table 24: Behavior of constant light controller when entering unoccupied state.
