RC1xx LED Lighting Controllers - User Manual
—
16
—
specified brightness limit when the light is characterised. This is called
the characterisation limit. The measured overdrive voltage and current
relationship is stored in the RC120 and allows it to respond much more
rapidly to new overdrive parameters up to that limit.
When a light is detected, the characteristics of the light are measured up to
the brightness set for the characterisation limit. It is not essential to set this
value and it can be left at 200 (meaning 200% brightness). The feature can
also be turned off by setting this value to 0.
You can change the characterisation limit brightness through the RC120’s
web pages (see Section 9,
“Web page configuration (RC120)”
) or by
command (see Section 10.3.4, “Lighting commands”).
7.6
Current adjust
The current adjust feature provides a more accurate and repeatable
output current. After setting an output current, the controller continually
measures the actual current and adjusts the output to maintain the target
current. This will compensate for any inaccuracies such as temperature
drift in the controller.
If the output current is less than 100mA, the adjustments the feature
imposes can have a significant effect on the lighting brightness. If some
flickering is seen, it is recommended that the current adjust feature is
turned off.
Current adjust can be turned on and off from the RC120’s web pages (see
Section 9,
“Web page configuration (RC120)”
) or by using the
RE
command
(see Section 10.3.3, “General commands”).
7.7
Flags
You can set flags on the RC1xx controller to alter its operation. They can be
set from the unit’s front panel, the web page or through the
RE
command
(see Section 10.3.3, “General commands”
). The following configuration flags
are available:
E Flag
– Enables or disables fault detection. Error checking is enabled
as the default setting.
P Flag
– Sets the trigger input active high or active low. The default
setting is active high. Refer to Section 7.2.1, “Trigger input options” for
a detailed description of the settings.
S Flag
– Sets the SafeSense feature of the RC1xx. When cleared it
removes the SafeSense light detection and the controller assumes a
light is connected. The default setting is for SafeSense to be enabled.
This flag cannot be used when the light is set according to its voltage
rating. The S flag cannot be changed from the RC1xx’s front panel.