Page 52 - Advanced Course

KNX ADVANCED COURSE

mode), compared to the 3 times 1 bit modes. In normal mode, all 3 settings have the
same priority and can be changed by one single telegram.

Table 8: Table of priorities in the 3 times 1 bit functional block (x = setting has no reaction)
KNX objects

Operating Frost Night reduction Comfort
mode protection

Frost/heat 1 x x
protection

Comfort 0 x 1
Night 0 1 0
Standby 0 0 0

Table 9: Table of priorities in 8 bit mode (DPT 20.102)
Operating Value of Remark
Mode KNX
Object
Building 4 Higher prioritized than 0-3
Protection

Economy 3
Precomfort 2
Comfort 1

Automatic 0 In this setting, the thermostat
can be controlled e.g. by a
separate clock object.

Figure 25: Room thermostat and the various mode settings
The room thermostat can be controlled externally (via KNX) or locally (multi-functional
button) and in this way set into the different operating modes. The current mode is
indicated by LEDs or symbols.
The exact manual operation is manufacturer specific as left open in the KNX Standard.

Home and Building Management Systems KNX Association
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