KNX AQS-UP basic Guide

Installation and Adjustment
KNX AQS-UP basic
Air Quality Sensor
Article numbers 70224 (white), 70225 (aluminium), 70226 (anthracite), 70227 (stainless steel)
EN
Elsner Elektronik GmbH Control and AutomationTechnology
Sohlengrund 16
D - 75395 Ostelsheim Phone [phone] / 30 945-0 [e-mail]
Germany Fax [phone] www.elsner-elektronik.de

1 Contents
Elsner Elektronik GmbH • Sohlengrund 16 • 75395 Ostelsheim • Germany
Sensor KNX AQS-UP basic • from software version 3.1, ETS programme version 3.1
Status: 24.03.2016 • Subject to technical changes. Errors excepted.
1. Description ........................................................................................... 3
1.0.1. Scope of delivery .......................................................................................... 3
1.1. Technical specifications ........................................................................................... 4
1.1.1. Accuracy of the measurement ..................................................................... 4
2. Installation and commissioning ........................................................... 5
2.1. Installation notes ...................................................................................................... 5
2.2. Installation position .................................................................................................. 5
2.3. Composition ............................................................................................................. 6
2.3.1. Housing .......................................................................................................... 6
2.3.2. Rear view of sensor board with connections ............................................. 7
2.4. Assembly of the sensor ........................................................................................... 7
2.5. Notes on mounting and commissioning ................................................................ 7
3. Transfer protocol ................................................................................. 9
3.1. List of all communications objects ......................................................................... 9
4. Parameter setting .............................................................................. 13
4.1. Behaviour on power failure/ restoration of power .............................................. 13
4.2. General settings ..................................................................................................... 14
4.3. CO2 measured value .............................................................................................. 14
4.4. CO2 threshold values ............................................................................................. 15
4.4.1. Threshold value 1, 2, 3, 4: CO2 .................................................................. 15
Threshold value .......................................................................................... 15
Switching output ......................................................................................... 16
Block ............................................................................................................. 16
4.5. CO2 PI control ......................................................................................................... 17
General control ........................................................................................... 17
Controller target value ................................................................................ 18
Ventilation control ...................................................................................... 19
4.6. Variable comparator .............................................................................................. 19
4.6.1. Control variable comparator 1/2 ................................................................ 19
4.7. Logic ........................................................................................................................ 20
AND logic ..................................................................................................... 20
OR logic ....................................................................................................... 20
4.7.1. AND and/or OR logic 1/2/3/4/5/6/7/8 .......................................................... 21
Block ............................................................................................................. 21
4.7.2. AND logic connection inputs ..................................................................... 22
4.7.3. Connection inputs of the OR logic ............................................................. 23

2 Clarification of signs
This manual is amended periodically and will be brought into line with new software
releases. The change status (software version and date) can be found in the contents footer.
If you have a device with a later software version, please check
www.elsner-elektronik.de in the menu area "Service" to find out whether a more up-to-
date version of the manual is available.
Clarification of signs used in this manual
Installation, inspection, commissioning and troubleshooting of the device
must only be carried out by a competent electrician.
Safety advice.
Safety advice for working on electrical connections, components,
etc.
DANGER! ... indicates an immediately hazardous situation which will lead to
death or severe injuries if it is not avoided.
WARNING! ... indicates a potentially hazardous situation which may lead to
death or severe injuries if it is not avoided.
CAUTION! ... indicates a potentially hazardous situation which may lead to
trivial or minor injuries if it is not avoided.
ATTENTION! ... indicates a situation which may lead to damage to property if it is
not avoided.
ETS In the ETS tables, the parameter default settings are marked by
underlining.

3 Description
Air Quality Sensor KNX AQS-UP basic • Version: 24.03.2016 • Technical changes reserved. Errors reserved.
1. Description
The Air Quality Sensor KNX AQS-UP basic measures the CO2concentration in the
room. The sensor can receive an external CO2value via the bus and process it with the
own data to an overall value (mixed value, e.g. room average).
The KNX AQS-UP basic provides four switching outputs with adjustable threshold
values. The switching outputs and further communication objects can be linked by
AND and OR logic gates. Additionally, an integrated actuating variable comparator can
compare and output values that are received via communication objects.
An integrated PI controllers allows for control of ventilation depending on CO2concen-
tration.
The housing is completed with a frame of the switching series installed in the building
and thus merges with the interior.
Functions:
• Measurement of CO2concentration of the air
•Mixed value from own measured value and external value (proportions can
be set in percentage)
•PI controller for ventilation depending on CO2concentration:
dehumidification/humidification (one step) or dehumidification (one or two
step)
•4 switching outputs with adjustable threshold values (Threshold values can
be set by parameter or via communication objects)
•8 AND and 8 OR logic gates with each 4 inputs. Every switching incident as
well as 8 logic inputs (in the form of communication objects) may be used as
inputs for the logic gates. The output of each gate may optionally be configured
as 1 bit or 2 x 8 bits
•2 actuating variable comparators for output of minimum, maximum or
average values. Each with 5 inputs (for values received via communication
objects)
Configuration is made using the KNX software ETS. The product file can be down-
loaded from the Elsner Elektronik website on www.elsner-elektronik.de in the “Ser-
vice” menu.
1.0.1. Scope of delivery
• Housing with display, buttons and sensor board
•CO
2sensor unit
• Base plate
You will need in addition (not supplied):
• Socket Ø 60 mm, 42 mm deep
• Frame (for element 55 x 55 mm), suitable for the switching programme used in
the building

4 Description
Air Quality Sensor KNX AQS-UP basic • Version: 24.03.2016 • Technical changes reserved. Errors reserved.
1.1. Technical specifications
* Mind the notes on Accuracy of the measurement, page 4
The product conforms with the provisions of EU guidelines.
1.1.1. Accuracy of the measurement
Measurement variations from sources of interference (see chapter Installation posi-
tion) must be corrected in the ETS in order to ensure the specified accuracy of the sen-
sor (offset). To ensure a correct CO2measurement, the device must be installed in a
windproof socket.
The indicated accuracy of the CO2measurement will be achieved after a run-in pe-
riod of 24 hours (without interruption of the bus voltage) if the sensor has been in con-
tact with fresh air (350…450 ppm) at least once in this period.
After this, the CO2sensor will recalibrate every two weeks by defining the lowest meas-
ured value captured during that period (without interruption of the bus voltage) as a
reference for fresh air.
Housing Plastic material (partly lacquered)
Colours • White glossy (similar to RAL 9016 Traffic White)
• Aluminium matt
• Anthracite matt
• Stainless steel
• Special colours on request
Mounting In-wall (in socket Ø60 mm, 42 mm deep)
Protection category IP 20
Dimensions Housing approx. 55 x 55 (W x H, mm),
mounting depth approx. 15 mm,
base plate approx. 71 x 71 (W x H, mm)
Total weight approx. 72 g
Ambient temperature Operation -10…+50°C, storage -20…+60°C
Ambient air humidity max. 95% R. H., avoid bedewing
Operating voltage KNX bus voltage
Bus current max. 10 mA
Data output KNX +/- bus terminal plug
BCU type Own micro controller
PEI type 0
Group addresses max. 254
Allocations max. 254
Communication objects 133
CO2 measurement range 0...2000 ppm
CO2resolution 1 ppm
CO2accuracy* ± 50 ppm ± 3% of the measured value

5 Installation and commissioning
Air Quality Sensor KNX AQS-UP basic • Version: 24.03.2016 • Technical changes reserved. Errors reserved.
The guarantee the accuracy on a sustained basis, the sensor should be provided with
fresh air at least once in two weeks. This occurs normally during room ventilation.
2. Installation and commissioning
2.1. Installation notes
Installation, testing, operational start-up and troubleshooting should
only be performed by an electrician.
CAUTION!
Live voltage!
There are unprotected live components inside the device.
• National legal regulations are to be followed.
• Ensure that all lines to be assembled are free of voltage and take
precautions against accidental switching on.
• Do not use the device if it is damaged.
• Take the device or system out of service and secure it against
unintentional use, if it can be assumed, that risk-free operation is no
longer guaranteed.
The device is only to be used for its intended purpose. Any improper modification or
failure to follow the operating instructions voids any and all warranty and guarantee
claims.
After unpacking the device, check it immediately for possible mechanical damage. If it
has been damaged in transport, inform the supplier immediately.
The device may only be used as a fixed-site installation; that means only when assem-
bled and after conclusion of all installation and operational start-up tasks and only in
the surroundings designated for it.
Elsner Elektronik is not liable for any changes in norms and standards which may occur
after publication of these operating instructions.
2.2. Installation position
The Air Quality Sensor KNX AQS-UP basic will be installed concealed within a so-
cket (Ø 60 mm, 42 mm deep).
May be installed and operated in dry interior rooms only.
Avoid condensation.
For monitoring of the CO2content of the room air choose an installation position in
height of head (standing or sitting, according to utilization of room). The CO2concen-
tration in indoor rooms is highest near the floor and decreases towards the ceiling.

6 Installation and commissioning
Air Quality Sensor KNX AQS-UP basic • Version: 24.03.2016 • Technical changes reserved. Errors reserved.
When selecting an installation location, please ensure that the measurement results
are affected as little as possible by external influences. Possible sources of interference
include:
• Drafts from windows and doors
• Draft from ducts which lead from other rooms or from the outside to the
junction box in which the sensor is mounted
Measurement variations from such sources of interference must be corrected in the
ETS in order to ensure the specified accuracy of the sensor (offset).
To ensure a correct CO2measurement, the device must be installed in a windproof
socket.
2.3. Composition
2.3.1. Housing
Fig. 1
1 Base plate
2Notches
3 Air circulation holes
4 Programming LED (recessed)
5 Programming button (reces-
sed) for teaching instrument
6 Air circulation holes
(BOTTOM)
3
2
5
4
6
1

7 Installation and commissioning
Air Quality Sensor KNX AQS-UP basic • Version: 24.03.2016 • Technical changes reserved. Errors reserved.
2.3.2. Rear view of sensor board with connections
2.4. Assembly of the sensor
First of all fit the windproof socket with connection. Also seal inlet pipes to avoid infil-
tration.
Screw the base plate onto the socket and position the frame of the switching pro-
gramme. Connect the CO2sensor unit and the bus line +/- (black-red plug) to the ter-
minals provided on the board.
Pin the sensor with the notches on to the metal frame, so that sensor and frame are
fixed.
2.5. Notes on mounting and commissioning
Never expose the device to water (e.g. rain) or dust. This can damage the electronics.
You must not exceed a relative humidity of 95%. Avoid condensation.
After the bus voltage has been applied, the device will enter an initialisation phase last-
ing a few seconds. During this phase no information can be received or sent via the
bus.
Fig. 2
1 KNX terminal BUS +/-
2Notches
3SlotforCO
2sensor unit
4 Plug of CO2 sensor unit
5CO
2sensor unit
Length of cable approx. 110 mm
a Hole centre distance approx. 43 mm
b Diameter of diaphragm
approx. 18 mm
2
1
34 5
a
b
Place the CO2sensor unit in the socket. The side with the sensor
membrane must face to front.
Fig. 3

8 Installation and commissioning
Air Quality Sensor KNX AQS-UP basic • Version: 24.03.2016 • Technical changes reserved. Errors reserved.

9 Transfer protocol
Sensor KNX AQS-UP basic • from software 3.1 • Status: 24.03.2016 • Technical changes reserved. Errors reserved.
3. Transfer protocol
Units:
CO2content in ppm
Variables in %
3.1. List of all communications objects
Abbreviation flags:
C Communication
R Read
WWrite
T Transfer
UUpdate
No. Name Function DPT Flags
0 Software version readable 217,001 C R T
2 CO2 sensor malfunction Output 1,001 C R T
98 Outside CO2 reading Input 9,008 C W
99 Inside CO2 Internal reading Output 9,008 C R T
100 Total CO2 reading Output 9,008 C R T
101 CO2 maximum value request Input 1,017 C W
102 Maximum CO2 reading Output 9,008 C R T
103 Reset CO2 maximum value Input 1,017 C W
104 CO2 threshold value 1: Absolute
value
Input/Output 9,008 C R W T
U
105 CO2 threshold value 1: (1:+ | 0:-) Input 1,002 C W
106 CO2 threshold value 1: Switching
delay from 0 to 1
Input 7,005 C W
107 CO2 threshold value 1: Switching
delay from 1 to 0
Input 7,005 C W
108 CO2 threshold value 1: Switching out-
put
Output 1,001 C R T
109 CO2 threshold value 1: Switching out-
put block
Input 1,002 C W
110 CO2 threshold value 2: Absolute
value
Input/Output 9,008 C R W T
U
111 CO2 threshold value 2: (1:+ | 0:-) Input 1,002 C W
112 CO2 threshold value 2: Switching
delay from 0 to 1
Input 7,005 C W

10 Transfer protocol
Sensor KNX AQS-UP basic • from software 3.1 • Status: 24.03.2016 • Technical changes reserved. Errors reserved.
113 CO2 threshold value 2: Switching
delay from 1 to 0
Input 7,005 C W
114 CO2 threshold value 2: Switching out-
put
Output 1,001 C R T
115 CO2 threshold value 2: Switching out-
put block
Input 1,002 C W
116 CO2 threshold value 3: Absolute
value
Input/Output 9,008 C R W T
U
117 CO2 threshold value 3: (1:+ | 0:-) Input 1,002 C W
118 CO2 threshold value 3: Switching
delay from 0 to 1
Input 7,005 C W
119 CO2 threshold value 3: Switching
delay from 1 to 0
Input 7,005 C W
120 CO2 threshold value 3: Switching out-
put
Output 1,001 C R T
121 CO2 threshold value 3: Switching out-
put block
Input 1,002 C W
122 CO2 threshold value 4: Absolute
value
Input/Output 9,008 C R W T
U
123 CO2 threshold value 4: (1:+ | 0:-) Input 1,002 C W
124 CO2 threshold value 4: Switching
delay from 0 to 1
Input 7,005 C W
125 CO2 threshold value 4: Switching
delay from 1 to 0
Input 7,005 C W
126 CO2 threshold value 4: Switching out-
put
Output 1,001 C R T
127 CO2 threshold value 4: Switching out-
put block
Input 1,002 C W
128 CO2 controller: Blocking object Input 1,002 C W
129 CO2 controller: Target value Input/Output 9,008 C R W T
130 CO2 controller: Target value (1:+ | 0:-) Input 1,002 C W
131 CO2 controller: Control variable venti-
lation (stage 1)
Output 5,001 C R T
132 CO2 controller: Control variable venti-
lation (stage 2)
Output 5,001 C R T
133 CO2 controller: Ventilation 1 status
(1=ON | 0=OFF)
Output 1,001 C R T
134 CO2 controller: Ventilation 2 status
(1=ON | 0=OFF)
Output 1,001 C R T
135 Comparator 1 actuating variable:
Input 1
Input 5,010 C W
No. Name Function DPT Flags

11 Transfer protocol
Sensor KNX AQS-UP basic • from software 3.1 • Status: 24.03.2016 • Technical changes reserved. Errors reserved.
136 Comparator 1 actuating variable:
Input 2
Input 5,010 C W
137 Comparator 1 actuating variable:
Input 3
Input 5,010 C W
138 Comparator 1 actuating variable:
Input 4
Input 5,010 C W
139 Comparator 1 actuating variable:
Input 5
Input 5,010 C W
140 Comparator 1 actuating variable: Out-
put
Output 1,001 C R T
141 Comparator 1 actuating variable:
Block
Input 1,002 C W
142 Comparator 2 actuating variable:
Input 1
Input 5,010 C W
143 Comparator 2 actuating variable:
Input 2
Input 5,010 C W
144 Comparator 2 actuating variable:
Input 3
Input 5,010 C W
145 Comparator 2 actuating variable:
Input 4
Input 5,010 C W
146 Comparator 2 actuating variable:
Input 5
Input 5,010 C W
147 Comparator 2 actuating variable: Out-
put
Output 1,001 C R T
148 Comparator 2 actuating variable:
Block
Input 1,002 C W
149 AND logic 1: 1-bit switching output Output 1,002 C R T
150 AND logic 1: 8-bit output A Output 5,010 C R T
151 AND logic 1: 8-bit output B Output 5,010 C R T
152 AND logic 1: Block Input 1,002 C W
153 AND logic 2: 1-bit switching output Output 1,002 C R T
154 AND logic 2: 8-bit output A Output 5,010 C R T
155 AND logic 2: 8-bit output B Output 5,010 C R T
156 AND logic 2: Block Input 1,002 C W
157 AND logic 3: 1-bit switching output Output 1,002 C R T
158 AND logic 3: 8-bit output A Output 5,010 C R T
159 AND logic 3: 8-bit output B Output 5,010 C R T
160 AND logic 3: Block Input 1,002 C W
161 AND logic 4: 1-bit switching output Output 1,002 C R T
162 AND logic 4: 8-bit output A Output 5,010 C R T
163 AND logic 4: 8-bit output B Output 5,010 C R T
164 AND logic 4: Block Input 1,002 C W
No. Name Function DPT Flags

12 Transfer protocol
Sensor KNX AQS-UP basic • from software 3.1 • Status: 24.03.2016 • Technical changes reserved. Errors reserved.
165 AND logic 5: 1-bit switching output Output 1,002 C R T
166 AND logic 5: 8-bit output A Output 5,010 C R T
167 AND logic 5: 8-bit output B Output 5,010 C R T
168 AND logic 5: Block Input 1,002 C W
169 AND logic 6: 1-bit switching output Output 1,002 C R T
170 AND logic 6: 8-bit output A Output 5,010 C R T
171 AND logic 6: 8-bit output B Output 5,010 C R T
172 AND logic 6: Block Input 1,002 C W
173 AND logic 7: 1-bit switching output Output 1,002 C R T
174 AND logic 7: 8-bit output A Output 5,010 C R T
175 AND logic 7: 8-bit output B Output 5,010 C R T
176 AND logic 7: Block Input 1,002 C W
177 AND logic 8: 1-bit switching output Output 1,002 C R T
178 AND logic 8: 8-bit output A Output 5,010 C R T
179 AND logic 8: 8-bit output B Output 5,010 C R T
180 AND logic 8: Block Input 1,002 C W
181 OR logic 1: 1-bit switching output Output 1,002 C R T
182 OR logic 1: 8-bit output A Output 5,010 C R T
183 OR logic 1: 8-bit output B Output 5,010 C R T
184 OR logic 1: Block Input 1,002 C W
185 OR logic 2: 1-bit switching output Output 1,002 C R T
186 OR logic 2: 8-bit output A Output 5,010 C R T
187 OR logic 2: 8-bit output B Output 5,010 C R T
188 OR logic 2: Block Input 1,002 C W
189 OR logic 3: 1-bit switching output Output 1,002 C R T
190 OR logic 3: 8-bit output A Output 5,010 C R T
191 OR logic 3: 8-bit output B Output 5,010 C R T
192 OR logic 3: Block Input 1,002 C W
193 OR logic 4: 1-bit switching output Output 1,002 C R T
194 OR logic 4: 8-bit output A Output 5,010 C R T
195 OR logic 4: 8-bit output B Output 5,010 C R T
196 OR logic 4: Block Input 1,002 C W
197 OR logic 5: 1-bit switching output Output 1,002 C R T
198 OR logic 5: 8-bit output A Output 5,010 C R T
199 OR logic 5: 8-bit output B Output 5,010 C R T
200 OR logic 5: Block Input 1,002 C W
201 OR logic 6: 1-bit switching output Output 1,002 C R T
202 OR logic 6: 8-bit output A Output 5,010 C R T
203 OR logic 6: 8-bit output B Output 5,010 C R T
204 OR logic 6: Block Input 1,002 C W
No. Name Function DPT Flags

13 Parameter setting
Sensor KNX AQS-UP basic • from software 3.1 • Status: 24.03.2016 • Technical changes reserved. Errors reserved.
4. Parameter setting
4.1. Behaviour on power failure/ restoration of
power
Behaviour following a failure of the bus power supply:
The device sends nothing.
Behaviour on bus restoration of power and following programming or reset:
The device sends all outputs according to their send behaviour set in the parameters
with the delays established in the "General settings" parameter block. The "Software
version" communications object is sent once after 5 seconds.
205 OR logic 7: 1-bit switching output Output 1,002 C R T
206 OR logic 7: 8-bit output A Output 5,010 C R T
207 OR logic 7: 8-bit output B Output 5,010 C R T
208 OR logic 7: Block Input 1,002 C W
209 OR logic 8: 1-bit switching output Output 1,002 C R T
210 OR logic 8: 8-bit output A Output 5,010 C R T
211 OR logic 8: 8-bit output B Output 5,010 C R T
212 OR logic 8: Block Input 1,002 C W
213 Logic input 1 Input 1,002 C W
214 Logic input 2 Input 1,002 C W
215 Logic input 3 Input 1,002 C W
216 Logic input 4 Input 1,002 C W
217 Logic input 5 Input 1,002 C W
218 Logic input 6 Input 1,002 C W
219 Logic input 7 Input 1,002 C W
220 Logic input 8 Input 1,002 C W
221 Logic input 9 Input 1,002 C W
222 Logic input 10 Input 1,002 C W
223 Logic input 11 Input 1,002 C W
224 Logic input 12 Input 1,002 C W
225 Logic input 13 Input 1,002 C W
226 Logic input 14 Input 1,002 C W
227 Logic input 15 Input 1,002 C W
228 Logic input 16 Input 1,002 C W
No. Name Function DPT Flags

14 Parameter setting
Sensor KNX AQS-UP basic • from software 3.1 • Status: 24.03.2016 • Technical changes reserved. Errors reserved.
4.2. General settings
Set the basic data transfer characteristics and select whether or not malfunction ob-
jects should be sent.
4.3. CO2 measured value
Use Offsets to adjust the readings to be sent.
The unit can calculate a mixed value from its own reading and an external value. Set
the mixed value calculation if desired.
Note: if an external portion is used, all of the following settings (threshold values, etc.)
are related to the overall reading!
The maximum readings can be saved and sent to the bus. Use the "Reset CO2max.
value" object to reset the value to the current reading.
Note: The values are not retained after a reset.
Send delay after power-up and programming for:
Measured values 5 s • ... • 2 h
Threshold values and switching outputs 5 s • ... • 2 h
Controller objects 5 s • 10 s • ... • 2 h
Logic outputs 5 s • 10 s • ... • 2 h
Maximum telegram quota • 1 message per second
• ...
• 5 messages per second
• ...
• 20 messages per second
Use CO2 malfunction object Yes • No
Offset in ppm -100...100; 0
Use external reading Yes • No
Ext. Reading proportion of the total reading 5% • 10% • ... • 50% • ... • 100%
Send internal and total reading • never
• periodically
• On change
• on change and periodically
From change of
(if sent on change)
2% • 5% • 10% • 25% • 50% (relative to the
last reading)
Send cycle
(if sent periodically)
5s• ... • 2 h
Use maximum value Yes • No

15 Parameter setting
Sensor KNX AQS-UP basic • from software 3.1 • Status: 24.03.2016 • Technical changes reserved. Errors reserved.
4.4. CO2 threshold values
Activate the threshold values that you want to use here. The Sensor KNX AQS-UP
basic provides three four threshold values for carbon dioxide.
Table of CO2 values:
1000 ppm corresponds to 0.1% CO2 content.
4.4.1. Threshold value 1, 2, 3, 4: CO2
Threshold value
Set the threshold values directly in the application program using parameters, or de-
fine them via the bus using a communications object.
Threshold value setpoint using parameter:
Set the threshold values and hysteresis directly.
Threshold value setpoint using a communications object:
Beforehand, enter how the threshold value will be received from the bus. Basically, a
new value can be received, or simply a command to increase or decrease.
During initial commissioning, a threshold value must be defined which will be valid un-
til the 1st communication of a new threshold value. For units which have already been
taken into service, the last communicated threshold value can be used. Basically, a
temperature range is given in which the threshold value can be changed (object value
limit).
A set threshold value will be retained until a new value or a change is transferred. The
current value is saved in EEPROM, so that this is retained in the event of a power sup-
ply failure and will be available once the power supply is restored.
Use threshold value 1/2/3/4 Yes • No
300 ... 500 ppm Fresh air
1500 ... 3000 ppm "Stale" air
5000 ppm Maximum allowable concentration
Threshold value setpoint using Parameter • Communications object
Threshold value in ppm 0...5000; 1200
Hysteresis of the threshold value in % 0 … 50; 20
Threshold value setpoint using Parameter • Communications object
The last communicated value should be
retained
• never
• after restoration of power
• after restoration of power and
programming
Start threshold value in ppm
valid till 1st communication
0...5000; 1200

16 Parameter setting
Sensor KNX AQS-UP basic • from software 3.1 • Status: 24.03.2016 • Technical changes reserved. Errors reserved.
Switching output
Set the behaviour of the switching output when a threshold value is exceeded/under-
cut. The output switching delay can be set using objects or directly as a parameter.
Block
The switching output can be blocked using an object. Define specifications here for the
behaviour of the output when blocked.
Object value limit (min) in ppm 0...5000
Object value limit (max) in ppm 0...5000
Type of threshold change Absolute value • Increase/decrease
Step size
(upon increase/decrease change)
1 • 2 • 5 • 10 • 20 • 50 • 100 • 200
Hysteresis of the threshold value in % 0 … 50; 20
When the following conditions apply, the
output is
(LV = Threshold value)
• LV above = 1 |LV - hysteresis below = 0
• LV above = 0 |LV - hysteresis below = 1
• LV below = 1 |LV + hysteresis above = 0
• LV below = 0 |LV + hysteresis above = 1
Delays can be set via objects
(in seconds)
No • Yes
Switching delay from 0 to 1
(when delay is not set using objects)
None • 1 s • 2 s • 5 s • 10 s • … • 2 h
Switching delay from 1 to 0
(when delay is not set using objects)
None • 1 s • 2 s • 5 s • 10 s • … • 2 h
Switching output sends • on change
• on change to 1
• on change to 0
• on change and periodically
• on change to 1 and periodically
• on change to 0 and periodically
Send cycle
(is only sent if "periodically" is selected)
5s• 10 s • 30 s… • 2 h
Use switching output block No • Yes
Analysis of the blocking object • At value 1: block | At value 0: release
• At value 0: block | At value 1: release
Blocking object value before 1st communi-
cation
0• 1
Behaviour of the switching output
With blocking • Do not send message
• send 0
• send 1
On release
(with 2 seconds release delay)
[Dependent on the "Switching output
sends" setting]

17 Parameter setting
Sensor KNX AQS-UP basic • from software 3.1 • Status: 24.03.2016 • Technical changes reserved. Errors reserved.
The behaviour of the switching output on release is dependent on the value of the pa-
rameter "Switching output sends" (see "Switching output")
4.5. CO2 PI control
If you activate air quality control, you can use the following settings to define control
type, target values, and ventilation.
General control
The Sensor KNX AQS-UP basic can be used to control one or two-stage ventilation.
Configure a block for the ventilation control using the blocking object.
Determine when the current control settings are to be sent to the bus. Periodic trans-
mission is safer if a message does not reach a recipient. You may also set up periodic
monitoring using an actuator with this setting.
The status object shows the current status of the output variable (0 = OFF,
>0 = ON) and can for example be used for visualisation.
Switching output sends on change • Do not send message
• Send switching output status
Switching output sends on change to 1 • Do not send message
• If switching output = 1 send 1
Switching output sends on change to 0 • Do not send message
• If switching output = 0 send 0
Switching output sends on change and
periodically
Send switching output status
Switching output sends on change to 1 and
periodically
If switching output = 1 send 1
Switching output sends on change to 0 and
periodically
If switching output = 0 send 0
Use control Yes • No
Type of control • One-stage ventilation
• Two-stage ventilation
Behaviour of the blocking object with value • 1 = Block | 0 = release
• 0 = block | 1 = release
Blocking object value
before 1st communication
0 • 1
Actuating variable comparator • on change
• on change and periodically
Send cycle
(is only sent if "periodically“ is selected)
5 s • ... • 5 min • … • 2 h

18 Parameter setting
Sensor KNX AQS-UP basic • from software 3.1 • Status: 24.03.2016 • Technical changes reserved. Errors reserved.
Controller target value
The target values can be set directly in the application program using parameters, or
be defined via the bus using a communications object.
Target value setting using parameter:
Set the target value directly.
Setting a target value via communications object:
Enter how the target value will be received from the bus in advance. Basically, a new
value can be received, or simply a command to increase or decrease.
During initial commissioning, a target value must be provided which will be valid until
the 1st communication of a new target value. For units which have already been taken
into service, the last communicated target value can be used. Basically, an air humidity
range is given in which the target value can be changed (object value limit).
A set target value will be retained until a new value or a change is transferred. The cur-
rent value is saved in EEPROM, so that this is retained in the event of a power supply
failure and will be available once the power supply is restored.
Send status object(s) • on change
• on change to 1
• on change to 0
• on change and periodically
• on change to 1 and periodically
• on change to 0 and periodically
Send cycle
(is only sent if "periodically" is selected)
5 s • ... • 5 min • … • 2 h
Target value setpoint using Parameter • Communications object
Target value in ppm 400…5000; 800
Threshold value setpoint using Parameter • Communications object
The last communicated value should be
retained
• never
• after restoration of power
• after restoration of power and
programming
Start target value in ppm
valid till 1st communication
(not upon saving the target value after pro-
gramming)
400… 5000; 800
Object value limit (min) in 0.1°C 400…5000; 400
Object value limit (max) in 0.1°C 400…5000; 1500
Type of threshold change Absolute value • Increase/decrease
Step size in ppm
(upon increase/decrease change)
1 • 2 • 5 • ... • 20 • ... • 100 • 200

19 Parameter setting
Sensor KNX AQS-UP basic • from software 3.1 • Status: 24.03.2016 • Technical changes reserved. Errors reserved.
Ventilation control
Depending on the control mode, one and/or two setting sections for the ventilation
stages are displayed.
For two-stage ventilation, the target value difference between the two stages must be
defined, i.e. the target value which, when exceeded, triggers the switch to the 2nd
stage.
Determine the deviation from the target value at which the maximum variable value is
reached, i.e. the point at which maximum output is used.
The reset time shows how quickly the control responds to deviations from the target
value. In case of a short reset time, the control responds with a fast increase of the var-
iable. In case of a long reset time, the control responds somewhat less urgently and
needs longer until the necessary variable for the target value deviation is reached.
You should set the time appropriate to the ventilation system at this point (follow the
manufacturer's instructions).
Now determine what should be sent when the control is blocked.
On release, the control variable follows the rule again.
4.6. Variable comparator
The two integrated control variable comparators can output maximum, minimum and
median values.
4.6.1. Control variable comparator 1/2
Determine what the control variable comparator should output, and activate the input
objects to be used. Send behaviour and blocks can also be set.
Target value difference between levels 1
and 2 Stage in ppm
(for stage 2 only)
100...4000; 400
Maximum control variable is reached
at target value/actual difference of (in ppm)
100...4000; 100
Reset time in minutes 1...255; 10
When blocked, the variable shall • not be sent
• send a specific value
Value
(if a value is sent for one 1-bit object)
0• 1
Value (in %)
((if a value is sent for an 8-bit object))
0...100
Use comparator 1/2 No • Yes