Clipsal C-Bus Manuale delle Istruzioni Pagina 132

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C-Bus™ Basic Programming 1250SM0904R10/09
C-Bus™ Products Training Course 10/2009
126 © 2009 Schneider Electric. All Rights Reserved.
When using the Light Level parameter, it is best to disable the sensor from
operating at night to ensure the light does not turn ON automatically due to
low Lux levels. A group address which is programmed into the Enable
Group parameter, will behave as follows:
when the Enable group is ON, the light level sensor will operate
when the Enable group is OFF, the light level sensor will not operate.
NOTE: If there is no Enable group, the light level sensor will always be
enabled by default.
The Indicator parameter allows you to specify which group address the
indicator will show the status of.
The Ambient Light section of the programming GUI will display the reflected
light level that is being read at the light level sensor (not at the floor). This is
used as a guide to determine the target Lux level. To view the reflected light
level you must ensure that:
Toolkit is physically connected to the C-Bus network
The Refresh check box is selected, which will update the Last
Measurement parameter every five seconds.
The Target parameters consist of 2 settings as shown below.
Parameter Description
Target The Target parameter allows you to specify the level that the Light ON/OFF
and Light Level parameters will operate at. Remember that this target is
measured at the unit, not at the floor.
Margin The Margin parameter allows you to specify the amount of light variation
that will occur before the Light Level Sensor will control the load. This is
used to ensure that scenarios such as passing clouds do not have sudden
affect on the loads.
Table 46 - Setting the target level on a light level sensor
The image below shows the relationship between the ambient light level,
the Target and the Margin.
Time
0
700
Light Level (Lux)
Load is ON
or Ramping
UP
No Action Due to
Margin
Load is
OFF or Ramping
Down
Target
&
Margin
Figure 111 - Load control depending on light level
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