Emerson Site Supervisor, User Manual

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5-8
•
Site Supervisor Controller User Guide 2.0 026-1800 Rev 3 02-AUG-2016
time has been met.
•
Min OFF Time
- The least amount of time the
command value must remain OFF before the Min
On/Off logic allows a transition to ON. If the
command value has not been OFF for at least this
value, the Min On/Off logic replaces the command
value with an OFF signal until the Minimum OFF
time has been met.
•
ON Delay
- delay between ON cmd and turning
lights ON. When the Min On/Off logic detects a
transition in the command value from OFF to ON,
it waits for the ON delay period to pass before
switching its output ON. If during this delay the
command value switches OFF again, the delay is
canceled and the lighting output remains OFF.
•
OFF Delay
- delay between OFF cmd and turning
lights OFF. When the Min On/Off logic detects a
transition in the command value from ON to OFF, it
waits for the OFF delay period to pass before
switching its output OFF. If during this delay the
command value switches ON again, the delay is
canceled and the lighting output remains ON.
5.4.7 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 Site Supervisor
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
NOTE: For the properties below, Light Level
Engineering Units should be displayed as fc
(foot candle).