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Siemens
RXB (KNX) application library
FNC Description of functions for FC-10, FC-11, FC-12
CM110385en_05
Building Technologies
Room operating modes
28 Feb 2009
Key:
Æ
Auto means: “changes to Auto”
1)
Comfort
mode is operative for the pre-defined
Temporary Comfort
period (see page
126). The room controller then reverts to
Economy.
5.6.4
Stand-alone Example
The example below shows how local influences interact to affect the room operating
mode.
•
Window contacts
are fitted
in all rooms
.
When the window is opened (1), the room operating mode changes to
Protection
,
and the room unit is switched to
.
•
Room 1
has a
room unit.
As no presence detector is connected, the basic room operation mode is
Precomfort
;
therefore, the timer (
Temporary Comfort
period: see page 126) is not available.
The room unit can be used to switch the room operating mode between
Comfort
and
Precomfort
(2).
•
Room 2
has a
presence detector
and a
room unit
..
If the room is unoccupied, the basic room operation mode is
Economy
. If it changes
to occupied, the room operating mode becomes
Comfort
(3), and the room unit is
switched to Auto.
The room unit can be used to switch between
Comfort
and
Precomfort
(2).
•
Room 3
: In order to force the basic room operation mode to be
Economy
, one of the
open Digital inputs is parameterized as Occupied = Contact closed (see page 126),
thus simulating a presence detector in state "unoccupied.
Starting from
Economy,
the timer (
Temporary Comfort
period: see page 126) is
available.
The room has a
room unit
with the timer enabled. It can be used to set the room
operating mode to
Comfort
(2). It reverts to
Economy
when the window is opened,
(3) when the timer period expires
(4), or when the /Auto switch is pressed again
(5).
