©2025 Copeland LP.
026-1803 R13 Supervisor I&O User Guide 9 - 16
9.11.7 Dimming Control (Analog
Output)
The application supports a dimming (analog) lighting output.
This output is intended to be used to control a dimming
module by specifying the percentage of maximum output of
the connected dimming module.
In dimming mode, dimming is controlled on the Light Level
sensor input to the application. If there is no Light Level
sensor or it reads NONE, the lights are forced to default
brightness (specified by the “Dim Fail %” parameter).
As the Light Level changes, the output ramps at a user
defined rate. The minimum % output corresponds to
maximum Light Level input. Anything above the maximum
Light Level results in the minimum % output. The maximum %
output corresponds to a minimum Light Level input. Anything
below the minimum Light Level input results in the maximum
% output.
The ramp is defined in terms of Light Level per second. The
ramp is linear between the minimum % output and the
maximum % output. The bypass dimming percentage input
forces the dimming percentage when in bypass operation.
Theory of Operation
As the Light Level input increases above minimum light level,
the Light Level analog output begins ramping to
accommodate. As the Light Level input increases above the
maximum light level but below the cut off light level, the Light
Level analog output ramps to the minimum percentage. As
the Light Level input increases above the cut off Light Level,
the ramped analog output is minimum, and the minimum on
time has been satisfied, the cut off delay begins counting
down.
If the light level continues above the cut off light level for the
duration of the cut off delay timeout, the lights output goes
OFF. If the light level dims to below the cut on light level, the
light's output turns ON. The Light Level analog output will
ramp to the appropriate percentage for that light level.
The following parameters are provided to allow configuration
of the light dimming output.
• CUTON - Normal light level cut ON setpoint.
• CUTOFF - Normal light level cut OFF setpoint.
• UNOCC CUTON - Unoccupied light level cut ON
setpoint.
• UNOCC CUTOFF - Unoccupied light level cut OFF
setpoint
• LLEV OCCUP - Occupancy input for light level setpoints
• Cut ON Delay - Light Level cut ON delay.
• Cut OFF - Light Level cut OFF delay.
• Cut ON Dly UNOC - Light Level cut ON delay
[unoccupied].
• Cut OFF Dly UNO - Light Level cut OFF delay
[unoccupied].
• LIGHT LEVEL IN - Light Level sensor input. The LIGHT
LEVEL IN input, which is the input to which the Light
Level sensor is connected, is by default connected to
Global Data’s LIGHT LEVEL OUT output. If there is no
Supervisory Controller on the network with a Light Level
sensor connected to Global Data, it will need to be set up.
• En Llev Proof - Enables light level proofing to
SUNDOWN input. The Enable Light Level Proofing field
enables or disables a feature in Lighting Control that
allows failures to be detected in the Light Level sensor if
the sensor does not fall below the cutoff setpoint after
sundown, or rise above the cut on setpoint after sunset. If
“Yes” is selected, the Llev Pr Delay parameter specifies
the time to wait before alarming if the above conditions
are not satisfied.
• Llev Pr Delay - Light level proofing alarm delay. The
Light Level Proof Delay is the amount of time after sunrise
or sunset that, if the light level sensor does not cut ON or
OFF appropriate to the light level of a sunrise or sunset,
generates an alarm. In other words, if the Light Level
Proof Delay is set for 1 hour, the light level must fall below
the cut-off setpoint at least one hour after sundown, or an
alarm is generated. Likewise, if the cut-on Light Level
setpoint is not reached by at least one hour after sunrise,
an alarm is generated.
• Dim Upper % - Upper dimmer percentage.
• Dim LL @ Upper% - Light level at upper dimmer
percentage.
• Dim Lower % - Lower dimmer percentage.
• Dim LL @ Lower% - Light level at lower dimmer
percentage.
• Dim Ramp Speed - Ramp speed in percent per minute.
• Dim Fail % - Percentage when light level sensor fails.
• Dim Shed % - Percentage when a demand shed event is
present.
9.11.8 External Schedule
An input is provided to allow a time schedule application to
be connected to the Lighting Application.
NOTE
NOTE: For the properties below, Light Level
Engineering Units should be displayed as fc (foot
candle).
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