Page 171 - Advanced Course

KNX ADVANCED COURSE

4.6 Parameterisation Example

4.6.1 Functions

We use 3 KNX components in this layout for a complete control system: a sensor with an
integrated controller (type = integral reset by 8 bit), a dimming actuator with a dual
dimming time base and a 3-fold push button with text display that enables the following
functions.

Function Effect

Switches actuator on/off, interrupts the CLL*)
Switch light manually (basic)
control

Dim light manually (basic) Dims the actuator, interrupts the CLL control

Starts the CLL control with the parameterised set
Switch automatic CLL control on/off (basic)
point or stops it

Set value manually for lighting Sets the brightness value at the actuator between
(continuously) (optional) 0 and 100%, interrupts the CLL control

CLL control triggered by a movement / presence
Presence (optional)
detector; or simpler, just by switch

Setpoint shift (optional) Variable LUX value setpoint control

Only for commissioning (or for advanced users to
Calibration
recalibrate later)

*) CLL: closed loop lighting

The usual range in which setpoint values can fluctuate is between 250 lux (lighting level
for less demanding activities) and 1500 lux (level for light-intensive laboratory
workstations where optical equipment is used such as lenses, microscopes etc.). The
sensor must maintain a system deviation of max. +/-15% throughout the range.
Two further functions/group addresses are required to calibrate the arrangement after the
installation:

measured lux value (to compare with the external lux meter)
calibration trigger
The brightness sensor/controller already mentioned above also enables calibration to be
carried out. The address ‘measured lux value’ is not really always necessary but strongly
recommended to be used in order to have an indication about how far the real measured
value and that one of the KNX sensor differ before the calibration is started. The
calibration process will calculate just a (for the user not accessible) gain factor between

Home and Building Management Systems KNX Association
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