
1250SM0904R10/09 C-Bus™ Basic Programming
10/2009 C-Bus™ Products Training Course
© 2009 Schneider Electric. All Rights Reserved. 55
Area Address
An area address is a C-Bus address that allows the control of all channels
of C-Bus output units.
An area address is actually a group address that is programmed into a
different memory location in a C-Bus unit. The area address will force all
channels on the output unit to follow the level of the group address that is
controlling it.
NOTE: An area address will only respond when it sees a change of state.
Sending an OFF command to an area address that is already OFF will have
no effect.
NOTE: Misuse of an area address may result in the unexpected behaviour
of a C-Bus network. While this function may easily be used as a Master
Control for the C-Bus network, it is not the best solution. An example of this
is turning ON all channels on output units, at the same time. This will result
in excessive inrush currents.
Levels
Every group address has 256 steps between OFF (0 and 0%) and ON (255
and 100%). These 256 steps are referred to as levels.
Group Address 01
100%
255
0%
0
1
2
3
4
5
6
7
8
9
10
1% 2% 3% 4%
11
12
5%
13
14
15
16
17
18
19
20
6% 7%
8%
249
250
251
252
253
254
248
241
242
243
244
245
246240
247239
99%
98%97%96%95%94%
OFF
Figure 37 - Levels inside a group address
Levels are occasionally referred to differently, depending on which C-Bus
application address the group address is on. When the C-Bus group
address is on the:
Lighting application, the 256 steps in a group address are referred to as
levels
Trigger Control application, the 256 steps in a group address are
referred to as action selectors
Heating application, the 256 steps in a group address are referred to as
levels
Enable application, the 256 steps in a group address are referred to as
values.
Levels and action selectors are most commonly used to trigger an event
(like a scene) from a remote location.
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