MDT KNX SCN-RT1UP.01 User manual

MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1
Phone: [phone] • Fax: [phone] • [e-mail] • www.mdt.de
State 12/2014
Technical Manual
MDT Room Temperature Controller
SCN-RT1UP.01
SCN-TS1UP.01
SCN-RT1UPE.01
SCN-RT1APE.01
Further Documents:
Datasheet:
https://www.mdt.de/EN_Downloads_Datasheets.html
Assembly and Operation Instructions:
https://www.mdt.de/EN_Downloads_Instructions.html
Solution Proposals for MDT products:
https://www.mdt.de/EN_Downloads_Solutions.html

Technical Manual –Room Temperature Controller SCN-RT1
MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1
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1 Content
1 Content................................................................................................................................................. 2
2 Overview............................................................................................................................................... 4
2.1 Overview devices........................................................................................................................... 4
2.2 Usage & Areas of use..................................................................................................................... 4
2.3 Exemplary circuit diagram............................................................................................................. 5
2.4 Structure & Handling..................................................................................................................... 5
2.5 Functions ....................................................................................................................................... 6
2.5.1 Overview functions................................................................................................................. 7
2.6 Settings at the ETS-Software......................................................................................................... 8
2.7 Starting up ..................................................................................................................................... 8
3 Communication objects........................................................................................................................ 9
3.1 Default settings of the communication objects ............................................................................ 9
4 Reference ETS-Parameter .................................................................................................................. 11
4.1 General Settings .......................................................................................................................... 11
4.2 Temperature measurement........................................................................................................ 12
4.3 Alarm/Messages.......................................................................................................................... 14
4.4 Controller general........................................................................................................................ 16
4.4.1 Controller type ..................................................................................................................... 16
4.4.2 Operating modes & Setpoints.............................................................................................. 17
4.4.3 Setpoint offset...................................................................................................................... 23
4.4.4 Blocking objects.................................................................................................................... 25
4.4.5 Heating/Cooling request objects.......................................................................................... 26
4.4.6 Guiding ................................................................................................................................. 27
4.4.7 Dead zone............................................................................................................................. 29
4.5 Controller settings....................................................................................................................... 31
4.5.1 Control value ........................................................................................................................ 31
4.5.2 PI control continuous ........................................................................................................... 32
4.5.3 PI control switching (PWM).................................................................................................. 35
4.5.4 2-step control (switching)..................................................................................................... 37
4.5.5 Direction of controller.......................................................................................................... 39
4.5.6 Additional level..................................................................................................................... 39
4.5.7 Additional settings for heating and cooling ......................................................................... 42

Technical Manual –Room Temperature Controller SCN-RT1
MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1
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5 Index................................................................................................................................................... 46
5.1 Register of Illustrations ............................................................................................................... 46
5.2 List of tables................................................................................................................................. 47
6 Attachment......................................................................................................................................... 48
6.1 Statutory requirements............................................................................................................... 48
6.2 Routine disposal .......................................................................................................................... 48
6.3 Assemblage.................................................................................................................................. 48
6.4 Controller..................................................................................................................................... 49
6.4.1 2-Step control....................................................................................................................... 49
6.4.2 PI-control continuous........................................................................................................... 50
6.4.3 PI-control switching (PWM) ................................................................................................. 51
6.5 Direction of controller................................................................................................................. 52
6.6 Datasheet .................................................................................................................................... 52

Technical Manual –Room Temperature Controller SCN-RT1
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2 Overview
2.1 Overview devices
The manual refers to the following devices, which are in our assortment of room temperature
controller (Order Code respectively printed in bold type):
•SCN-RT1UP.01 Room temperature controller UP
ointegrated temperature controllers: Two-position, PI, PWM; flush mounted
•SCN-RT1APE.01 Room temperature controller AP with adjustment knop
ointegrated temperature controllers: Two-position, PI, PWM; surface mounted; with
adjustment knop
•SCN-RT1UPE.01 Room temperature controller UP with adjustment knob
ointegrated temperature controllers: Two-position, PI, PWM; flush mounted; with
adjustment knop
•SCN-TS1UP.01 Room temperature sensor 1-fold
oSensor for measuring the room temperature, without controller function
2.2 Usage & Areas of use
The room temperature controller has its areas of use at the controlling in home installations and in
the object range.
A lot of different controls can be realized by the room temperature controller. There are three
integrated controllers, which can be adjusted to the present system. The three controllers can
control as well heating systems as cooling systems. There are setting options for up to 4 different
operating modes. Additional levels, blocking functions, settings of external sensors and guiding can
also be adjusted.
An exception is the SCN-TS1UP.01. The SCN-TS1UP.01 is only a sensor for measuring the temperature.
There are no integrated temperature controllers at this device. The temperature sensor has its areas
of use at the measuring of temperatures for other controllers.

Technical Manual –Room Temperature Controller SCN-RT1
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2.3 Exemplary circuit diagram
Figure 1: Exemplary circuit diagram
2.4 Structure & Handling
The room temperature controller is available in three different designs. There are designs for flush-
mounting and surface-mounting.
All of the devices contain of a bus-connection, a programming button and a programming LED at the
back.
Figure 2: SCN-RT1UP.01 Figure 3: SCN-RT1APE.01 Figure 4: SCN-RT1UPD.01
The room temperature sensor, SCN-TS1UP.01, is for flush-mounting. It contains also of a bus-
connection, a programming button and a programming LED.

Technical Manual –Room Temperature Controller SCN-RT1
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2.5 Functions
All room temperature controllers can measure a temperature and send a control variable. The
controller has 5 different sub-menus. At every sub menu, different settings can be made. The sub
menus are structured in this way:
•Setup general
General settings can be made at this menu and the used device can be chosen.
•Temperature measurement
The settings for the measurement for the temperature can be made at this menu. Settings
for the min/max values and the sensor configuration are available at this parameter.
All sensors contain of an in-plant balance.
•Alarm/Messages
Alarms and messages can be adjusted at this menu. This alarms and messages report when
the temperature falls below an adjusted value or exceed an adjusted value.
•Controller general
At this menu, the desired function (heating, cooling or heating & cooling) can be assigned
and general settings, like setpoints, can be adjusted.
•Controller settings
This menu appears as soon as the controller has got a function assigned. Integrated
controllers can be chosen at this menu and the chosen controller can be parameterized
further.
If you choose the SCN-TS1UP.01 as device at the setup general, only the menus setup general,
temperature measurement and alarm/messages will be shown.

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2.5.1 Overview functions
Setup general
Startup delaytime
delaytime after turn on of the bus power
Hardware selection
Adjustment of the used device
Temperature
measurement
Send actual value
•can be switched on/off
•report condition for change of
temperature adjustable from 0,1K to 2Kr
Send actual value cyclic
•can be switched on/off
•times of sending adjustable
Min/max values
•report can be switched on/off
•can be reset manual by communication
object
Sensor configuration
•additional connection of an external
sensor possible
•balance internal/external sensor
adjustable
•balance worth for internal sensor
adjustable
Alarm/Messages
Alarms
•can be switched on/off
•Frost-/Heat alarm
Messages
•can be switched on/off
•Report condition of the Min/Max
temperatures parameterize able
Controller general
Controller type
•Heating
•Cooling
•Heating & Cooling
Priority
Order of the operating modes adjustable
Basis-Setpoint
Reference point of the temperature control
Setpoints
Reference points for operating modes and
controller modes parameterize able
Shift of setpoints
•Max. shift parameterize able
•Scope of the shift parameterize able
•can be saved
Blocking objects
can be used for heating and cooling separately
Guiding
•can be switched on/off
•Min/Max Values parameterize able
•impact to setpoint parameterize able

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Controller settings
Integrated controller
•2 step control
oHysteresis parameterize able
•PI-control continuous
oMax. value of control variable
oSetting of used system
ofree parameterization of specific
values available
•PI control switching (PWM)
oMax. value of control variable
oSetting of used system
ofree parameterization of specific
values available
oPWM-cycletime parameterize able
•Additional levels available
Switch over heating/cooling
•automatically
•via object
Direction of controller
•normal
•inverted
Table 1: Functional overview
2.6 Settings at the ETS-Software
Selection at the product database:
Manufacturer: MDT Technologies
Product family: Control System
Product type: Room temperature controller
Medium Type: Twisted Pair (TP)
Product name: addicted to the used type, e.g.: SCN-RT1xPx.xx
Order number: addicted to the used type, e.g.: SCN-RT1UP.01
2.7 Starting up
After wiring the allocation of the physical address and the parameterization of every channel follow:
(1) Connect the interface with the bus, e.g. MDT USB interface
(2) set bus power up
(3) Press the programming button at the device(red programming LED lights)
(4) Loading of the physical address out of the ETS-Software by using the interface(red LED goes
out, as well this process was completed successful)
(5) Loading of the application, with requested parameterization
(6) Switch the power supply on
(7) If the device is enabled you can test the requested functions(also possible by using the ETS-
Software)

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3 Communication objects
3.1 Default settings of the communication objects
The following chart shows the default settings for the communication objects:
Default settings
Nr.
Channel/Input
Function
Length
Priority
C
R
W
T
U
0
Actual temperature
value
Transmit temperature
value
2 Byte
Low
X
X
X
1
Higher message value
Send message
1 Bit
Low
X
X
X
2
Lower message value
Send message
1 Bit
Low
X
X
X
3
Frost alarm
Send alarm
1 Bit
Low
X
X
X
4
Heat alarm
Send alarm
1 Bit
Low
X
X
X
5
External sensor
Read external sensor
2 Byte
Low
X
X
6
Setpoint comfort
Set setpoint
2 Byte
Low
X
X
X
X
7
Manual setpoint value
offset
Reduction/Increase
2 Byte
Low
X
X
8
Control value heating
Send control value
1 Bit
Low
X
X
X
8
Control value heating
Send control value
1 Byte
Low
X
X
X
8
Control value
heating/cooling
Send control value
1 Bit
Low
X
X
X
8
Control value
heating/cooling
Send control value
1 Byte
Low
X
X
X
9
Control value
additional heating
Send control value
1 Bit
Low
X
X
X
10
Control value cooling
Send control value
1 Bit
Low
X
X
X
10
Control value cooling
Send control value
1 Byte
Low
X
X
X
11
Mode comfort
Switch mode
1 Bit
Low
X
X
X
12
Mode night
Switch mode
1 Bit
Low
X
X
X
13
Mode frost/heat
protection
Switch mode
1 Bit
Low
X
X
X
14
Heating disable object
Disable heating
1 Bit
Low
X
X
15
Cooling disable object
Disable cooling
1 Bit
Low
X
X
17
Heating request
Send request
1 Bit
Low
X
X
X
18
Cooling request
Send request
1 Bit
Low
X
X
X
19
Heating/Cooling
switchover
0=Heating
1=Cooling
1 Bit
Low
X
X

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Table 2: Communication objects –default settings
You can see the default values for the communication objects from the upper chart. According to
requirements the priority of the particular communication objects as well as the flags can be
adjusted by the user. The flags allocates the function of the objects in the programming thereby
stands C for communication, R for Read, W for write, T for transmit and U for update.
* from version 1.2
20
Guiding value
Setpoint adjustment
2 Byte
Low
X
X
X
21
Max memory value
Read memory
2 Byte
Low
X
X
X
X
22
Min memory value
Read memory
2 Byte
Low
X
X
X
X
23
Min/Max memory
reset
Reset memory
1 Bit
Low
X
X
X
24
Reset setpoint value
Parameter read in
1 Bit
Low
X
X
25
DPT_HVAC Status*
Send controller status
1 Byte
Low
X
X
X
28
Error external Sensor
Error message
1 Bit
Low
X
X
X
29
Actual setpoint
Send setpoint
2 Byte
Low
X
X
X
30
DPT_RHCC*
Send controller status
2 Byte
Low
X
X
X
31
Mode selection
Select mode
1 Byte
Low
X
X
X

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4 Reference ETS-Parameter
4.1 General Settings
The following settings are available at the ETS-Software:
Figure 5: General settings
The chart shows the dynamic range of the general settings:
ETS-text
Dynamic range
[default value]
comment
Startup delaytime
0-60s
[0]
Time between an upload and the
functional start of the device
Table 3: General settings
The parameter startup timeout adjusts the time between an upload and the functional start of the
device. The used hardware reacts only after expiration of the adjusted time. All input commands
before the startup timeout expire.
The SCN-TS1UP.01 is a pure temperature sensor, which does not contain of any controller functions.
When this hardware is selected, only the menus “Setup general“(4.1), “Temperature measurement”
(4.2) and “Alarm/Messages” (4.3) are shown and can be parameterized.

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4.2 Temperature measurement
The following settings are available at the ETS-Software:
Figure 6: Temperature measurement
The chart shows the dynamic range of the available parameters:
ETS-text
Dynamic range
[default value]
comment
Send actual value after change
of
▪disable
▪0,1K - 2,0K
Sending condition for the actual
temperature value
Send actual temperature
cyclically
▪disable
▪1 min –60 min
Activation of the cyclically sending of
the temperature value
Send min/max value
▪disable
▪Send enable
Activation of the sending of min/max
values
Internal sensor correction value
(value*0,1K)
-50 –50
[0]
Correction of the internal sensor
Internal/external sensor
▪100% intern
▪90% intern/ 10% extern
▪80 % intern/ 20% extern
▪…
▪100% extern
Adjustment of the balance between
internal and external sensor
Table 4: Parameter Temperature measurement
The effects of the settings are described at the following page.

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▪Send actual value after change of
This functions sets when the current temperature value shall be sent. By choosing the setting
“disable”, no value will be sent at all.
▪Send actual temperature cyclically
You can activate this function by choosing a time. Now, the room temperature controller
sends the current temperature periodically after the adjusted time. This function is
independent from the function “Send actual value after change of”. So the temperature
controller will send its current value also if there is no change of it.
▪Internal sensor correction value (value*0,1K)
You can correct the measured temperature value by this setting. By choosing a negative
value for this parameter, the measured value will be lowered and by choosing a positive
value, the measured value will be lifted. The value is multiplied by 0,1K, so the current value
can be lowered or lifted up to 5K. This setting is useful, when the sensor was built at an
unfavorable location, e.g. becoming draft or next to a window. When this function is
activated, the temperature controller will also send the corrected values.
All sensors are matched in-plant to 0,1K.
The chart shows the relevant communication object for the temperature value:
Number
Name
Length
Usage
0
Actual temperature value
2 Byte
sends the current temperature value
Table 5: Communication object temperature value
▪Send min/max value
This function activates the sending and saving of the min/max values. When the function is
activated by “Send enable”, three communication objects will be shown. Two objects for the
Min and the Max value and one for the reset of the min/max values.
The chart shows the relevant communication objects for this parameter:
Number
Name
Length
Usage
21
Max memory value
2 Byte
sends and saves the maximal temperature
value
22
Min memory value
2 Byte
sends and saves the minimal temperature value
23
Min/Max memory reset
1 Bit
resets the min/max values
Table 6: Communication objects Min/Max values
▪Internal/external sensor
This setting sets the balance between an internal and an external sensor. The setting 100%
intern deactivates any external sensor. By choosing any other setting, an external sensor will
be activated. So, also communication objects for the external are shown. A balance of 100%
extern deactivates the internal sensor and the temperature controller will only note values of
the external sensor.
The communication objects for an activated external sensor are shown at the chart:
Number
Name
Length
Usage
5
External sensor
2 Byte
sends the measured temperature value of the
external sensor
28
Error external sensor
1 Bit
sends an error, when the external sensor sends
no value for more than 30min
Table 7: Communication objects external sensor

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4.3 Alarm/Messages
The following settings are available at the ETS-Software:
Figure 7: Alarm/Messages
The chart shows the dynamic range of the alarm and messages:
ETS-text
Dynamic range
[default value]
comment
Alarm
▪not active
▪active
Activation of the alarm function
Frostalarm if value <
3°C-10°C
[7°C]
Dynamic range of the frostalarm
Adjustment possible if alarm is activated
Heatalarm if value >
25°C-40°C
[35°C]
Dynamic range of the heatalarm
Adjustment possible if alarm is activated
Messages
▪not active
▪active
Activation of the message function
Message if value >
18°C-40°C
[26°C]
Dynamic range of the upper message
Adjustment possible if messages are
activated
Message if value <
1°C-25°C
[13°C]
Dynamic range of the lower message
Adjustment possible if messages are
activated
Table 8: Parameter Alarm/Messages

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▪Alarm
There are two parameterize able alarms, when the alarm function was activated. The
frostalarm is for the notification of the lower temperatures and the heatalarm for the
notification of the upper temperatures. Both alarms have a separate communication object
with the size of 1 Bit.
The chart shows the relevant communication objects for the alarms:
Number
Name
Length
Usage
3
Frostalarm
1 Bit
send frostalarm
4
Heatalarm
1 Bit
send heatalarm
Table 9: Communication objects alarm
▪Messages
The message function is almost identical to the alarm function, but less in its priority. There
are two messages available, when the message function was activated. These two messages
can be parameterized separately. The dynamic range of the message function is much bigger
than the one of the alarm function. So it is also possible, to realize running turn over. Both
messages have an own communication object of the size 1 bit. These communication objects
are shown in the chart below:
Number
Name
Length
Usage
1
Higher message value
1 Bit
Send the achievement of the higher reporting
limit
2
Below message value
1 Bit
Send the achievement of the lower reporting
limit
Table 10: Communication objects messages

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4.4 Controller general
4.4.1 Controller type
The following settings are available at the ETS-Software:
Figure 8: Setting controller type
The chart shows the dynamic range of the controller type:
ETS-text
Dynamic range
[default value]
comment
Controller type
▪Controller off
▪Heating
▪Cooling
▪Heating and Cooling
Adjustment of the controller type
The further settings depent to the adjusted
controller type
Table 11: Setting controller type
The controller type defines the function of the room temperature controller. Target of the control is
to keep an adjusted temperature constant. There are a lot of settings, which can help to achieve this
aim. The settings depend to the adjusted controller type.
By choosing the setting “controller off”, no further settings are possible.

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4.4.2 Operating modes & Setpoints
The following settings are available at the ETS-Software:
Figure 9: Operating modes & setpoints
The chart shows the dynamic range of the operating modes and setpoints:
ETS-text
Dynamic range
[default value]
comment
Basis comfort setpoint
18,0°C –25,0°C
[21,0°C]
The basis comfort setpoint is the reference
point of the control.
Night reduction
Lowering in K
0 K –10,0 K
[3,0 K]
Lowering of the temperature by choosing
the operating mode night.
Relative to the basis comfort setpoint.
Standby reduction
Lowering in K
0 K –10,0 K
[2,0 K]
gets activated when no other operating
mode was chosen
The lowering is relative to the basis
comfort setpoint.
Setpoint frost protection
3°C –12°C
[7°C]
Setpoint of the operating mode frost
protection.
indicated by an absolute value
Setpoint heat protection
24°C –40°C
[35°C]
Setpoint of the operating mode heat
protection.
indicated by an absolute value
Table 12: Operating modes & setpoints

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4.4.2.1 Operating mode Comfort
The operating mode comfort is the reference mode of the controller. The temperature reduction at
the operating modes night and standby refer to the setpoint of the comfort mode. When a room is
used, the operating mode comfort should be activated. The configured setpoint, the “basic comfort
setpoint, is valid for the heating process if the controller was set as heating & cooling (described at
4.4.7).
The chart shows the relevant 1-Bit communication object:
Number
Name
Length
Usage
11
Mode comfort
1 Bit
Activation of the operating mode comfort
Table 13: Communication object operating mode comfort
4.4.2.2 Operating mode Night
The operating mode night shall cause a significant decrement of the temperature, for example at
night or at the weekend. The reduction can be programmed freely and refers to the basic comfort
setpoint. If you have programmed a reduction of 5K and a basic comfort setpoint of 21°C, the
setpoint for the night mode will be 16°C.
The chart shows the relevant 1-Bit communication object:
Number
Name
Length
Usage
12
Mode night
1 Bit
Activation of the operating mode night
Table 14: Communication object operating mode night
4.4.2.3 Operating mode Standby
When nobody is in the room, the operating mode standby is used. This operating mode shall cause a
low reduction of the temperature. So the room can be heated up fast again.
The value for the reduction can be programmed freely and refers to basic comfort setpoint. If you
have adjusted a reduction of 2K and a basic comfort setpoint of 21°C, the setpoint for the operating
mode standby will be 19°C.
The standby mode cannot be activated by a certain communication object. It gets activated, when all
operating modes are switched off.
4.4.2.4 Operating mode Frost/Heat protection
The operating mode frost protection gets activated, when the controller type was set as heating. The
heat protection gets activated, when the controller type was set as cooling. When the controller type
is set to heating and cooling, the combined operating mode frost-/ heat protection is activated.
This operating mode causes an automatically switch on of heating or cooling, when a parameterized
is exceeded or the temperature falls below a parameterized temperature. At this operating mode,
the temperature is set as absolute value. You should activate this function if you are longer absent
and the temperature must not fall below a specific value or exceed a specific value.
The chart shows the relevant 1-Bit communication objects:
Number
Name
Length
Usage
13
Mode frost protection
1 Bit
Activation of the operating mode frost protection
13
Mode heat protection
1 Bit
Activation of the operating mode heat protection
13
Mode frost/heat protection
1 Bit
Activation of the operating mode frost/heat
protection
Table 15: Communication object operating mode frost/heat protection

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4.4.2.5 Priority of the operating modes
The following settings are available at the ETS-Software:
Figure 10: Priority of the operating modes
The chart shows the dynamic range of the priority of the operating modes:
ETS-text
Dynamic range
[default value]
comment
Priority
▪Frost/Comfort/Night/Standby
▪Frost/Night/Comfort/Standby
Adjustment of the priority of the
operating modes
Table 16: Priority of the operating modes
The setting of the priority enables to adjust which operating mode shall be switched primarily when
more than one operating mode is switched on. At the priority of Frost/Comfort/Night/Standby, the
comfort mode will be switched on even if comfort and night is switched on to the same time. The
night mode will only be active, when the comfort mode is switched off. now the controller changes
automatically to the night mode.
4.4.2.6 Operating mode switchover
There are 2 possibilities for the switchover of the operating modes: On the one hand the operating
modes can be switched on by their 1 Bit communication object and on the other hand by a 1 Byte
object (from Version 1.2).
The selection of the operating modes by their 1 Bit communication object occurs via a direct
selection of their individual communication object. With consideration of the adjusted priority, the
operating mode, which was selected via the 1 Bit communication object, is switched on or off. When
all operating modes are switched off, the controller changes to the standby mode.
Example:
The priority was set as Frost/Comfort/Night/Standby.
Operating mode
adjusted operating mode
Comfort
Night
Frost-/ Heat protection
1
0
0
Comfort
0
1
0
Night
0
0
1
Frost-/Heat protection
0
0
0
Standby
1
0
1
Frost-/Heat protection
1
1
0
Comfort
Table 17: Example switchover of the operating modes via 1 Bit

Technical Manual –Room Temperature Controller SCN-RT1
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20
20
The switchover of the operating modes via 1 Byte occurs by only one object, with the size of 1 Byte,
the DPT_HVAC Mode 20.102 of KNX-specification. Additional, there are 2 objects for the visualization
available, the 1 Byte object “DPT_HVAC Status” and the 2 Byte object “DPT_RHCC Status”. For the
switchover of the operating modes, a Hex-value is sent to the object “mode selection”. The object
evaluates the received value and switches the belonging operating mode on and the active operating
mode off. If all operating modes are switched off (Hex-value=0), the operating mode standby will be
switched on.
The Hex-values for the operating modes are shown at the chart:
Operating mode (HVAC Mode)
Hex-Value
Comfort
0x01
Standby
0x02
Night
0x03
Frost/Heat protection
0x04
Table 18: Hex-Values for operating modes (from Version 1.2)
The following example shall clarify how the controller handles received Hex-values and switches
operating modes on or off. The chart is to read from the top to the down.
Example:
The priority was set as Frost/Comfort/Night/Standby.
received Hex-value
Handling
adjusted operating
mode
0x01
Comfort=1
Comfort
0x03
Comfort=0
Night=1
Night
0x02
Night=0
Standby=1
Standby
0x04
Frost-/Heat protection=1
Standby=0
Frost-/Heat protection
Table 19: Example operating mode switchover via 1 Byte (from Version 1.2)
The DPT HVAC Status communication, DPT_HVAC Status (without number) of KNX-specification,
object sends the hex value for the adjusted operating mode. When more than one testify is valid, the
hex values are added and the communication object sends the added value. The hex values can be
read from visualization afterwards.
The following chart shows the hex values for the single messages:
Bit
DPT HVAC Status
Hex-Value
0
Comfort
1=Comfort
0x01
1
Standby
1=Standby
0x02
2
Night
1=Night
0x04
3
Frost-/Heat protection
1= Frost-/Heat protection
0x08
4
5
Heating/Cooling
0=Cooling/1=Heating
0x20
6
7
Frost alarm
1=Frost alarm
0x80
Table 20: Hex-Values DPT HVAC Status (from Version 1.2)
If you heat at the comfort mode, the communication object will send the value 20 (for heating) +1
(for the comfort mode) =21.