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Notes on operating mode switch-over via "Switching" (4 x 1-bit):
• When the operating modes are switched-over, the objects, too, (comfort mode / standby mode / night mode /
frost/heat protection) will always be updated and can, if applicable, be read out (set "read" flag!). Once the
"transmission" flag is set for these objects, changed values will also be actively transmitted to the bus. Following
a return of bus voltage or an initialization, the object corresponding to the set operating mode will be updated
and its value actively transmitted to the bus when the "transmission" flag is set.
• When parameterizing a presence key:
The presence object is active "1") for the duration of an activated comfort mode extension.
The presence object will be automatically deleted ("0"), if the comfort mode extension is terminated after the
extension time has elapsed or if the operating mode has been switched by a higher-priority control via the
switch-over objects or via local operation.
• The operating mode switch-over via "value" (2 x 1-byte):
A shared 1-bit switch-over object exists for all operating modes. Via this value object, the operating mode can
instantly be switched over after receiving only one telegram. The received value will determine the operating
mode.
In addition, there is a second 1-byte object available which can (by forced control and higher ranking) set an
operating mode independent of all other available switch-overs. Both 1-byte objects are implemented according to
the KONNEX specification.
Taking into account the priorities there is the following switching hierarchy for an operating mode switch-over by
objects, with a distinction being made between a presence detection via presence key (table 1 / figure 1) and by
presence detector (table 2 / figure 2 on next page):
Table 1
"Operating mode
switch-over" object
Obj.-No. 28
X
X
X
X
X
01
02
03
04
01
02
03
04
00
00
*:
depends on the last available operating mode. / X = irrelevant
**: Values greater than "04" will not be evaluated. A "00" value will leave the last available operating mode
active.
***: Values greater than "04" will not be evaluated. A "00" value signifies a deactivated forced object.
07/17
Subject to change without notice
"Forced object
Window
operating mode"
object ***
Obj.-No. 34
Obj.-No. 32
01
02
03
04
00
00
00
00
00
00
00
00
00
00
00
Presence
status
key object
Obj.-No. 33
X
X
X
X
X
X
X
X
1
X
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
0
0
1
instabus KNX/EIB System
Sensor
activated operating mode
Comfort
Standby
Night
Frost /heat protection
Frost /heat protection
Comfort
Standby
Night
Frost /heat protection
Comfort
Comfort
Comfort extension
Comfort extension
last available mode
Comfort / comfort mode
extension *
2100-xx/2101 xx Page 27/82
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