Page 95 - Advanced Course

KNX ADVANCED COURSE

Linking a brightness control module
H el l i gkei t sst euer bau -

Dimming sensor
Switch, Status Brighter/darker Set x%
EIS 1 (1 bit) EIS 2 (4 bit) EIS 6 (1 byte)
Brightness Brightness
sensor control module
Brightness value Brightness value Dimming
EIS 5 (2 byte) EIS 5 (2 byte)
actuator
Switch, Status Switch, Status
EIS 1 (1 bit) EIS 1 (1 bit)
Brighter/darker Brighter/darker
EIS 2 (4 bit) EIS 2 (4 bit)
Set x% Set x%
EIS 6 (1 byte) EIS 6 (1 byte)
Push button Status Status
EIS 6 (1 byte)
EIS 6 (1 byte)
On/off Enable/dis. status
EIS 1 (1 bit) EIS 1 (1 bit)
Figure 8: Combination of an automatic brightness control system with manual operation

1.5 Heating – Ventilation – Air Conditioning

The heating or air conditioning systems can be controlled in the same way as for lighting
control. The bus is used here as well to link the distributed components: actuators which
set the heating or cooling valves and controllers with either integrated or separate
temperature sensors.

Individual room control - control loop
Individual room control - control loop

Controlling system Controlled system Z

W Controller Y Actuator Contr. variable X

X

Measuring device
Temp. sensor

W ... Command variable (e.g. temp. setpoint) Z ... Disturbance (e.g. window open)
Y ... Output variable (e.g. valve position 0 - 100 %) X ... Actual value (actual room temp.)
Figure 9: Control loop of a heating control system - principle

Home and Building Management Systems KNX Association
Integrated Applications Integrated Applications_E0999b.doc 9/16