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Following is a description of the additional programmable features. See the DIP SWITCH SETTINGS section, for a table showing the
switch combinations for each feature, as well as the specific values indicated by the blinking green LED.
Alerts
The PW can provide audible and/or visible alerts as a warning before the load turns OFF. By default, visible alert is disabled and audio
alert is enabled.
Walk-Through
The Walk-Through mode shortens the time delay to reduce the amount of time the load is ON after a brief moment of occupancy, such as
returning to an office to pick up a forgotten item then immediately exiting. If Walk-Through Mode is turned ON, the PW sensor turns the
load OFF three minutes after the area is initially occupied, if no motion is detected after the first 30 seconds. If motion continues beyond
the first 30 seconds, the set time delay applies. Walk-Through Mode is OFF by default.
PIR Sensitivity Adjustment
The PW sensor constantly monitors the controlled environment and automatically adjusts the PIR to avoid common ambient conditions
that can cause false detections, while providing maximum coverage. You can also manually select a sensitivity value. The default is High,
which is suitable for most applications. A value of Low reduces sensitivity by approximately 50%. This is useful in cases where the PIR
is detecting movement outside of the desired area (you may also be able to address this by masking the lens) and where heat sources
cause unnecessary activation.
High and Low Trim
You can adjust the maximum and minimum dimming amounts by adjusting the High and Low Trim (each trim value is adjusted
separately). By default, the values are set at 100% (10v) for High Trim and OFF (0v) for Low Trim. If set to Manual Adjustment, press the
Up or Down buttons to set the parameters to the desired level.
Ramp Up and Fade Down Time
You can adjust the amount of time it takes to Ramp Up from the Low Trim value to the High Trim value when motion is detected, or Fade
Down from High Trim to Low Trim after no motion is detected and the time delay has expired. The available values for ramp up are 1
(default),2½, 5, and 10 seconds. Available values for fade down are 2½ (default), 5, 15, and 30 seconds.
Note: The ramp up time will be scaled if the Preset On Level is anything less than the High Trim amount. For example, if the Low Trim is set
to 0v and High Trim is set to 10v (the defaults) and the Ramp Up Time is set to 10 seconds, that is one volt per second. If the Preset On Level is
set to Last Non-Zero Value and the on value was previously at 6v, then it will take 6 seconds to ramp up, since is it one volt per second.
Note: These parameters do not affect the time to ramp up or fade down when pressing the Up or Down buttons to raise or lower the light
level. Instead, this is always set to 2 volts per second. So going from 0-10 volts when pressing the Up button will always take 5 seconds.
Light Level Adjustment
This features allows you to set a light level threshold, which determines how the PW-311 will respond based on the ambient light level.
This function is available only when the PW-311 is set for Auto ON.
There are two modes of Light Level Adjustment. In the Standard mode, you set a fixed threshold. Loads will not turn ON automatically
until the ambient light drops below that threshold.
In the Smart Light Level mode, the PW-311 sets an initial threshold. Then, if the occupant turns the load on manually when the current
light level is at or above that threshold, that means the occupant requires more lighting and therefore the current threshold is too low.
The PW-311 will then automatically raise the threshold by a specific amount (so that the load will now turn on automatically at a higher
ambient light level than was originally set). Conversely, if the occupant turns the load OFF after it has been turned on automatically, the
occupant requires less lighting and therefore the threshold is lowered. Note that the load must be turned completely OFF in order for the
threshold to change—dimming the load to a lower amount of light will not change the threshold.
To enable light level control and set the threshold:
1. Make sure the room is lit appropriately.
2. Set DIP switches 6-9 to the position needed to access this feature (Up, Down, Down, Up).
3. Press and release the UP button, so that the green LED blinks twice, if you are selecting the Standard mode. Press and release the
UP button again, so that the green LED blinks three times, if you are selecting Smart Light Level mode.
4. Set the four DIP switches so that they are all in the Down position.
5. Step away from the sensor. After 10 seconds, the unit will beep twice indicating that the threshold level is set. This threshold is
retained, even if power is lost, until it is reset or disabled.
To disable light level control, set the DIP switches to access this features, then press and release the DOWN button until the green LED
blinks once. Return the DIP switches so that they are all in the Down position.
Power Loss Mode
This mode determines how the loads will be set when power is returned after a power loss. There are three possible settings.
• Keep Last State – The load returns to the same state as before the power failure (ON or OFF). If it was previously ON, the load will
return to the most recent dimming level, and if it was previously OFF, it will remain OFF. If the load was previously ON and the room
is now unoccupied, the load will turn OFF once vacancy is detected. This is the default.
• Default To On – The load will turn ON at 100% level after power is restored, no matter whether the load was on or off before power
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