
1250SM0904R10/09 C-Bus™ Basic Programming
10/2009 C-Bus™ Products Training Course
© 2009 Schneider Electric. All Rights Reserved. 41
Learn Mode
C-Bus Learn Mode
The C-Bus system features a non PC programming method called Learn
Mode. Learn Mode allows the units on a C-Bus network to listen to each
other and learn their operation by simple button presses on the units.
DIN Rail LED Indicators
On the front of all DIN rail output units, there are 3 types of LED indicators.
The:
Unit indicator
C-Bus indicator
local toggle indicators.
4321
C-Bus
Unit
5
67
8
Local Toggle
Buttons
Unit
Indicator
C-Bus
Indicator
Figure 29 - LED indicators on the front of a DIN rail output unit
The local toggle LEDs show the status of each channel on that particular
DIN rail unit. Each local toggle LED is also a button, which can control and
override the current status of that particular channel when pressed. These
buttons may also be used to program the network without using C-Bus
Toolkit, using a process called Learn Mode.
The Unit LED indicates if a mains voltage is present at that particular DIN
rail unit. If the Unit LED flashes with a 90% duty cycle, it indicates that a
remote or local override has been toggled.
The C-Bus LED indicates the status of the C-Bus network that particular
DIN rail unit. For the C-Bus LED to be On, a C-Bus clock and C-Bus voltage
must be present. If the C-Bus LED flashes, then the C-Bus voltage may be
low.
Not all C-Bus units are Learn Mode enabled. Some commonly used basic
C-Bus units that do not have Learn Mode are:
1 and 2 channel relays
C-bus Light Level Sensor
touch screens
C-bus Infrared Transmitter.
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