Basic Documentation

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Siemens Wall-mounted sensors and room operator units for KNX/ETS and KNX/ACS CM2N1602en_07
Smart Infrastructure ETS engineering 2020-06-20
Obj. Object name Function Type / Length Flags
QMX3.P30 QMX3.P40 QMX3.P70 QMX3.P34 QMX3.P44 QMX3.P74 QMX3.P02 QMX3.P37
Room air quality sensor
38 CO
2
concentration [ppm] CO
2
-Concentration in the room in ppm
9.008
2 bytes
CRWU
X X
Room air quality control
39 Switching point CO
2
- stage 1 CO
2
concentration in ppm
9.008
2 bytes
CRWU
X X X X X X X X
40 Switching point CO
2
- stage 2 CO
2
concentration in ppm
9.008
2 bytes
CRWU
X X X X X X X X
41 Switching point CO
2
- stage 3 CO
2
concentration in ppm
9.008
2 bytes
CRWU
X X X X X X X X
42 Control value CO
2
cont. - manual setp. Setpoint in ppm
5.001
1 byte
CRWU
X X X X X X X X
43 Control value CO
2
cont. - manual mode Manual/Auto mode
1.003
1 bit
CRWU
X X X X X X X X
44 Enable room air quality controller On/Off
1.003
1 bit
CRWU
X X X X X X X X
45 Override room air quality controller Ventilation (Boost) on/off
1.003
1 bit
CRWU
X X X X X X X X
46 Control value CO
2
stage 1 - on/off 1 = On / 0 = Off
1.001
1 bit
CRT
X X X X X X X X
47 Control value CO
2
stage 2 - on/off 1 = On / 0 = Off
1.001
1 bit
CRT
X X X X X X X X
48 Control value CO
2
stage 3 - on/off 1 = On / 0 = Off
1.001
1 bit
CRT
X X X X X X X X
49 Control value CO
2
- cont 0-100%
5.001
1 byte
CRT
X X X X X X X X
50 Control value CO
2
/ r.h. m ax.- cont. 0 to 100%
5.001
1 byte
CRT
X X X X X X X X
QMX3.P70 Air quality LED indicator
51 Air quality: Enable LED indication 1 = On / 0 = Off
1.003
1 bit
CRWU
X
This object outputs the greater value for obj. 36 and obj. 49.
This object s witches on and off the LED display on the QMX3.P70.
The positioning signal CO
2
belonging to the stage is switched on if the CO
2
concentration
exceeds the switching point CO
2
. The positioning signal CO
2
is switched off again for CO
2
concentration < switching point CO
2
- hys teresis.
The positioning signal configured to the state is outputted if CO
2
concentration exceeds a
switching point CO
2
. The positioning signal once again outputs the value of the next smaller
stage, CO
2
concentration < switching point CO
2
- hysteresis.
Provides the CO
2
value from the integrated sens or.
Units with display: Must be placed in a group addres s to display operation/symbol display.
External CO
2
room sensor, see object 73
Changing over to the manual mode permits receipt of a manual setpoint (Obj. 42) for the modulating positioning signal
(Obj. 49). Otherwise, the configured positioning signals for the applicable stage are outputted.
All controller outputs are switched off upon receipt of "Controller off".
The controller remains disabled until "Controller on" is received. The default value is controller on = 1.
For controller override, the stage defined in the parameter "Stage is overridden" is enabled. Objects 46, 47, 48 as sume
only the value "1=On" for the corresponding object; the other two objects the value "0 = Off". The modulating positioning
signal (obj. 49) outputs the value configured for the applicable stage.
Override has the highest priority. The default state is "Normal".
The configured default switching points apply as long as no value is received from the bus.
In manual mode (obj. 43, 1=Manual), a setpoint is received via this object and outputted directly as modulating positioning
signal (object 49).
Devices