
1250SM0904R10/09 C-Bus™ Basic Programming
10/2009 C-Bus™ Products Training Course
© 2009 Schneider Electric. All Rights Reserved. 125
Light Level Sensors
The Light Level Sensor programming GUI is broken up into 3 programming
areas:
Groups
Ambient Light
Target.
Figure 110 - The Light Level Sensor GUI
The Groups settings consists of 4 parameters:
Light ON/OFF
Light Level
Enable Group
Indicator.
The Light ON/OFF parameter will turn a group address ON and OFF once
the ambient light level crosses the specified Lux target level. Once the
ambient light level that is measured by the sensor is falls below the target
Lux level, the load will turn on. Once the ambient light level that is measured
by the sensor is rises above the target Lux level, the load will turn off.
The Light Level parameter will dim a group address Up and Down (over a
60 second ramp time), to ensure that the specified Lux target in the area is
maintained. Once the ambient light level that is measured by the sensor
falls below the target Lux level, the load will ramp up to increase the amount
of light in the area. Once the ambient light level that is measured by the
sensor is rises above the target Lux level, the load will ramp down to reduce
the amount of light in the area. Basically the Light Level Sensor is trying to
maintain a constant Lux level in the area.
NOTE: When using the Light Level parameter, the sensor will always turn
on the load when the ambient light level falls below the target Lux level. The
Light Level parameter will never turn the load OFF, as the sensor will ramp
the load down to 1%. If you wish to turn off the load you will need to disable
the Light Level Sensor, and then issue an OFF command to the load.
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