RTxxx LED lighting controllers - User Manual
Display
error
Comms error
number
Reason
E1
Err 21
Current output is too low. This may be
because the light has become
disconnected.
E2
Err 22
The lighting required more than the
maximum available current for the
voltage rating.
E3
Err 23
Current output is not what was
expected. The controller might need
calibrating.
E6
Err 23
The power rating of the light exceeds
the maximum power rating.
7.5
Cold start
You can clear the RTxxx configuration to its default settings - this clears
the lighting ratings and sets all channels to 50% brightness continuous
operation. You can do this by sending the
CL command using Ethernet or
serial connection.
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RTxxx LED lighting controllers - User Manual
8
Lighting setup
The rating of the light must be set by the user. This rating is the supply to
the lighting that should be used to get 100% continuous brightness from
the light. The RTxxx is compatible with both current and voltage rated
lighting.
You must enter the rating for the light before connecting it to the controller,
or if you replace it with a different type of light. If a light is replaced with the
same type of light then the previous rating still applies.
Consult the specification or labelling for the light. For commercially
available lighting modules, if a voltage and current rating is given, use the
current rating. If a voltage and wattage rating is given, use the voltage
rating. Otherwise use the current rating. For ‘homemade’ lights using
single LEDs or arrays of LEDs use the current rating from the
LED datasheet.
You can set the current rating from 0.01A to 3A in steps of 0.01A, and you
can set the voltage rating from 12V to 36V in steps of 1V.
When you connect a voltage rated light, the RTxxx automatically senses
the current rating of the light.
Voltage and current rated lights are both driven with a constant current.
This gives better brightness stability and allows the RTxxx to prevent the
light being driven with too much power.
To set the rating of a light on RS232 or Ethernet versions of the RTxxx
controller, use the
VL command (see
Section 12, Command
configuration
), or use the internal webpages on Ethernet versions of the
RTxxx controller (see
Section 11, Webpage configuration (RT220, RT420,
RT820F)
).
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