Theben VARIA 826 S KNX User manual

VARIA 826 S KNX Multi-functional display with room thermostat
Room thermostat with display
VARIA 826 S KNX
VARIA 826 S KNX 8269210 /8269211
Updated: Sep-14 (Subject to change) Page 1 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
Contents
1Functional characteristics ................................................................................................6
1.1 Integrated functions.................................................................................................6
1.2 Special features.........................................................................................................6
1.3 Operation ..................................................................................................................7
2Technical data ...................................................................................................................8
2.1 Technical data...........................................................................................................8
3"Varia 824 / 826 S KNX EIB V1.2" application programme ........................................9
3.1 Selection in the product database...........................................................................9
3.2 Communication Objects........................................................................................10
3.2.1 Description of objects...........................................................................................16
3.3 Parameter................................................................................................................31
3.3.1 Parameter pages....................................................................................................31
3.3.2 Parameter description...........................................................................................32
3.3.2.1 The General parameter page ........................................................................32
3.3.2.2 The RTR setting parameter page..................................................................36
3.3.2.3 Heating setpoint values parameter page.......................................................40
3.3.2.4 Cooling setpoint values parameter page: .....................................................43
3.3.2.5 Heating control parameter page ...................................................................44
3.3.2.6 Cooling control parameter page...................................................................47
3.3.2.7 Additional heating stage parameter page .....................................................51
3.3.2.8 Actual value parameter page........................................................................53
3.3.2.9 Fan stages parameter page............................................................................55
3.3.2.10 Setpoint value adjustment parameter page...............................................56
3.3.2.11 Select display pages parameter page........................................................58
3.3.2.12 Weather data parameter page...................................................................60
3.3.2.1 Weather forecast parameter page 1..............................................................61
3.3.2.1 Parameter page page 1, forecast day............................................................62
3.3.2.1 Parameter pages page_1, time interval.........................................................63
3.3.2.1 Parameter pages page_1, weather. ...............................................................64
3.3.2.1 Parameter pages page_1, temperature..........................................................65
3.3.2.1 Parameter pages page_1, precipitation.........................................................66
3.3.2.1 Parameter pages page_1, precipitation amount............................................67
3.3.2.1 Parameter pages page 1, wind force ............................................................68
3.3.2.2 Display objects parameter pages, page 1..5 .................................................69
3.3.2.3 Page 1, line 1 to page 5, line 8 parameter pages ..........................................70
3.3.2.4 Text list parameter page...............................................................................82
3.3.2.5 Time program channel 1 (for RTR) parameter page....................................83
3.3.2.6 Time program channel 2..8 parameter pages ...............................................85
4Start-up ............................................................................................................................88
4.1 Activate program mode .........................................................................................88
Updated: Sep-14 (Subject to change) Page 2 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
4.2 Settings menu..........................................................................................................89
4.2.1 PIN code...............................................................................................................89
4.2.2 Date and time .......................................................................................................90
4.2.3 Temperature .........................................................................................................90
4.2.4 Time program.......................................................................................................91
4.2.4.1 Time program overview page ......................................................................92
4.2.4.2 Display, enter or change programs...............................................................94
4.2.5 Language..............................................................................................................97
4.2.6 Display .................................................................................................................98
4.2.7 System..................................................................................................................98
4.3 Freely programmable display pages.....................................................................99
4.3.1 Operation............................................................................................................101
4.3.2 Hints on setting up pages ...................................................................................103
4.3.3 Favourite page....................................................................................................105
4.3.3.1 Favourite page as standard display page....................................................105
4.3.3.2 Favourite page as alarm page.....................................................................105
4.4 Troubleshooting....................................................................................................106
5Typical applications.......................................................................................................107
5.1 Show weather predictions on the weather forecast page..................................107
5.1.1 Devices:..............................................................................................................107
5.1.2 Overview............................................................................................................108
5.1.3 Objects and links................................................................................................108
5.1.4 Important parameter settings..............................................................................109
5.2 Display weather data and air quality .................................................................110
5.2.1 Devices:..............................................................................................................110
5.2.2 Overview............................................................................................................110
5.2.3 Objects and links................................................................................................110
5.2.4 Important parameter settings..............................................................................111
5.3 Blinds or shutter / awning control......................................................................113
5.3.1 Devices:..............................................................................................................113
5.3.2 Overview............................................................................................................113
5.3.3 Important parameter settings..............................................................................113
5.3.3.1 Varia...........................................................................................................113
5.3.3.2 JMG 4S.......................................................................................................114
5.3.4 Objects and links................................................................................................114
5.4 Conservatory control ...........................................................................................115
5.4.1 Devices:..............................................................................................................115
5.4.2 Overview............................................................................................................115
5.4.3 Objects and links................................................................................................116
5.4.4 Important parameter settings..............................................................................117
5.5 Heating control, basic configuration ..................................................................119
5.5.1 Devices:..............................................................................................................119
5.5.2 Overview............................................................................................................119
5.5.3 Objects and links................................................................................................120
5.5.4 Important parameter settings..............................................................................121
5.5.4.1 Varia...........................................................................................................121
5.5.4.2 TA 2............................................................................................................121
5.5.4.3 Cheops drive...............................................................................................121
Updated: Sep-14 (Subject to change) Page 3 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
5.6 Fan coil actuator control......................................................................................122
5.6.1 Devices:..............................................................................................................122
5.6.2 Overview............................................................................................................122
5.6.3 Important parameter settings..............................................................................123
5.6.3.1 Varia...........................................................................................................123
5.6.3.2 FCA 1.........................................................................................................123
5.6.3.3 Presence detector........................................................................................124
5.6.3.4 TA 2............................................................................................................124
5.6.4 Objects and links................................................................................................125
5.7 Heating control with 6 heating circuits and window monitoring for caretakers.
126
5.7.1 Devices:..............................................................................................................126
5.7.2 Overview............................................................................................................127
5.7.3 Important parameter settings..............................................................................128
5.7.3.1 Varia...........................................................................................................128
5.7.3.2 TA 2............................................................................................................129
5.7.3.3 RAM 712....................................................................................................130
5.7.3.4 HMT 6........................................................................................................130
5.7.4 Objects and links................................................................................................131
6Appendix........................................................................................................................134
6.1 Weather forecasts with Meteodata 139 EFR KNX...........................................134
6.2 Fan forced mode...................................................................................................135
6.3 PWM cycle ............................................................................................................137
6.3.1 Basic principle....................................................................................................137
6.3.2 Response to changes in the control variable ......................................................138
6.4 Operating mode scene..........................................................................................139
6.4.1 Principle .............................................................................................................139
6.4.2 Saving scenes: ....................................................................................................139
6.4.3 Calling scenes:....................................................................................................140
6.5 Create and display scene telegrams....................................................................141
6.5.1 Allot scene numbers text....................................................................................142
6.5.1.1 Examples:...................................................................................................142
6.6 Setpoint value adjustment...................................................................................144
6.6.1 Format of setpoint adjustment: Relative............................................................145
6.6.2 Format of setpoint adjustment: Absolute...........................................................147
6.7 Temperature control............................................................................................149
6.7.1 Introduction........................................................................................................149
6.7.2 Response of the P-control ..................................................................................150
6.7.3 Response of the PI controller .............................................................................151
6.8 Continuous and switching control......................................................................152
6.9 Hysteresis ..............................................................................................................152
6.9.1 Negative hysteresis:............................................................................................152
6.9.2 Positive hysteresis..............................................................................................153
6.10 Dead zone ..............................................................................................................153
6.10.1 Case 1: Heating and cooling with continuous control....................................153
6.10.2 Case 2: Heating with 2-point control and cooling with continuous control...154
Updated: Sep-14 (Subject to change) Page 4 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
6.10.3 Case 3: Heating with 2-point control and cooling with continuous control...154
6.10.4 Case 4: Heating and cooling with 2-point control..........................................154
6.11 Operating mode selection ....................................................................................155
6.11.1 Priorities for operating mode selection ..........................................................155
6.11.2 Determining the current operation mode .......................................................156
6.11.2.1 New operating modes.............................................................................156
6.11.2.2 Old operating modes ..............................................................................158
6.11.2.3 Determining the setpoint value ..............................................................159
6.12 Setpoint offset .......................................................................................................161
6.12.1 Setpoint temperature offset via the + and - buttons .......................................161
6.12.2 Setpoint temperature offset via object 1.........................................................162
6.13 Base setpoint value and current setpoint value.................................................163
6.13.1 Setpoint value calculation ..............................................................................164
6.14 Maximum text length according to line format.................................................165
6.15 Template for documentation of use of freely programmable pages................166
7Operating instructions...................................................................................................167
Updated: Sep-14 (Subject to change) Page 5 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
1 Functional characteristics
1.1 Integrated functions
•Room thermostat for heating and cooling operation with additional heating stage.
•8 channel time switch: 1 channel for controlling HVAC mode of a room thermostat
and 7 free channels.
•User-friendly switching on of lights via hotkey function
•Up to 5 freely configurable screens
•Each screen can display a heading and up to 8 lines of text or functions,→equivalent
to 40 channels.
•User-specific function with free choice of text for each line for sending or displaying
received values or status telegrams
•Multi-lingual user interface
1.2 Special features
•Weather forecast display combined with the weather data receiver Meteodata 139 EFR
(Display page 1).
•Integrated time switch with the option of sending 3 rather than just 2 different statuses.
•Receipt and display of 14 byte text strings via the bus
•1 display page for current weather data
•Own physical address can be displayed
•Can also be operated without mains supply
•Display of 4 Byte floating-point telegrams (DPT 14.xxx / EIS 9)
•RTR page can be permanently blanked out (via a parameter)
•Display/sending of 1 or 2 byte numerical values in negative numerical range
(format DPT 6.001 and DPT 8.001)
Updated: Sep-14 (Subject to change) Page 6 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
1.3 Operation
Key
A
UP cursor
B
Menu
Menu key
C
DOWN cursor
D
+
Increase value / reverse status
E
OK
Confirm entry
F
-
Reduce value / reverse status
Updated: Sep-14 (Subject to change) Page 7 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
2 Technical data
2.1 Technical data
Operating voltage KNX
Bus voltage 21..32V DC
Current consumption KNX bus
<= 10mA (without key light)
<= 24mA (with 100% key light)
Installation type
Flush-mounted wall installation
Connection type
KNX bus terminal
Power reserve
1.5 years
Display
Display with 132 x 72 points (8 lines with various
functions) e.g. title, switching, dimming, % value,
blinds/shutters, heating/air conditioning/ventilation,
temperature, 2 byte counter value, etc.
Display lighting
LCD with white backlighting, dimmable
Ambient temperature
0 ºC .. +45 C°
Protection rating
IP 20
Protection class
III according to DIN 60 730-1
Updated: Sep-14 (Subject to change) Page 8 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
3 "Varia 824 / 826 S KNX EIB V1.2"
application programme
3.1 Selection in the product database
Manufacturer
Theben AG
Product family
Heating, ventilation, air conditioning
Product type
Controller with display and operating function
Program name
Varia 82x: RTR with display and operating function. V1.2
This application program was produced for ETS from version 3.0e.
The ETS database can be found on our downloads page: www.theben.de/en/downloads_en
Table 1
Number of communication objects:
129
Number of group addresses:
154
Number of associations:
154
Updated: Sep-14 (Subject to change) Page 9 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
3.2 Communication Objects
Table 2: Overview
No. Object name Function
Type &
DPT
Flags
C
R
W
T
0 Base setpoint value
Defining the setpoint
temperature
2 byte
9.001

1 Manual setpoint offset Send/receive manual offset
2 byte
9.002
 
2
Outdoor temperature
compensation
Adjust setpoint value
2 byte
9.002



Adjust setpoint value




3 Current setpoint value Report current setpoint value
2 byte
9.001

4 Actual value Send actual value
2 byte
9.001

5 External actual value Receive ext. actual value
2 byte
9.001

6 Sensor failure Report sensor failure
1 bit
1.001

7 Operating mode preset Operating mode preset
1 byte
20.102

Night <-> standby 1 = night, 0 = standby
1 bit
1.001
8
Presence
Input for presence signal
1 bit
1.001

Comfort
1 = comfort
9
Window position
Input for window contact
1 bit
1.001

Frost protection
1 = Frost protection
10
Operating mode of time
program
Report internal operating
mode
1 byte
20.102

11 Lock time program Lock switching program = 1
1 bit
1.001

12 Current operating mode
Report current operating
mode
1 byte
20.102

13 Heating actuating value (%) Send actuating value
1 byte
5.001

ON/OFF actuating value
heating
Send actuating value
1 bit
1.001
14
Heating PWM actuating
value
Send actuating value
1 bit
1.001

15
Additional heating stage
actuating value (%)
Send actuating value
1 byte
5.001

ON/OFF actuating value
additional heating stage
Send actuating value
1 bit
1.001
Updated: Sep-14 (Subject to change) Page 10 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
Continuation:
No. Object name Function
Type &
DPT
Flags
C
R
W
T
16 Cooling actuating value (%) Send actuating value
1 byte
5.001

ON/OFF actuating value
cooling
Send actuating value
1 bit
1.001

17
Cooling PWM actuating
value
Send cooling actuating value
1 bit
1.001

18
Report heating
mode/cooling mode
Heating = 0, Cooling = 1 1 bit
1.001 

switchover between heating
and cooling
Heating = 0, Cooling = 1
19 No energy medium 1 = No energy medium
1 bit
1.001

20 Operating mode scene Scenes 1-16 = 0 ..15
1 byte
18.001

21 Hotkey function switch
1 bit
1.001
 
22 Forced fan stage send/receive
1 byte
5.001
 
23
Fan forced/auto mode
1 = Forced/ 0 = Auto
1 bit
1.001
 
Fan auto/forced mode
1 = Auto / 0 = Forced
24 Time
Receive time
1 byte
10.001



Send / receive time




25 Date
Receive date
1 byte
11.001



Send / receive date




26 Time query Send time and date
1 bit
1.001

27 Outside temperature
Receive outdoor
temperature
2 byte
9.001

28 Wind speed Receive wind speed
2 byte
9.005

29 Brightness Receive brightness value
2 byte
9.004

30 Rain Receive rain status
1 bit
1.001

31 Recording weather data Restart recording
1 bit
1.001
 
Updated: Sep-14 (Subject to change) Page 11 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
Continuation:
No. Object name Function
Type &
DPT
Flags
C
R
W
T
32 Switching program channel 2
Send temperature in K
2 byte
9.002

Send temperature in °C
2 byte
9.001

Send percentage value
1 byte
5.001

Send On/Off
1 bit
1.001

Send value 0..255
1 byte
5.010

Send HVAC operating mode
1 byte
20.102

33
Switching program channel 3
See object 32
-



34
Switching program channel 4
See object 32
-



35
Switching program channel 5
See Object 32
-



36
Switching program channel 6
See object 32
-



37
Switching program channel 7
See object 32
-



38
Switching program channel 8
See object 32
-



39
Display page 1, line 1 Text string
14 byte
16.001

Display page 1, line 1
Switching ON/OFF
1 bit
1.001



Operation page 1, line 1




Display page 1, line 1
percentage value
1 byte
5.001



Operation page 1, line 1




Display page 1, line 1
HVAC operating mode
1 byte
20.102



Operation page 1, line 1




Display page 1, line 1
Value 0..255
1 byte
5.010



Operation page 1, line 1




Display page 1, line 1
Dim brighter / darker
4 bit
3.007



Operation page 1, line 1




Display page 1, line 1
Temperature
2 byte
9.001



Operation page 1, line 1




Display page 1, line 1
EIS 5 value
2 byte
9.*



Operation page 1, line 1




Display page 1, line 1
Counter value 0 ..65535
2 byte
7.001



Operation page 1, line 1




Display page 1, line 1
Scene
1 byte
18.001



Operation page 1, line 1




Display page 1, line 1
Blinds up/down
1 bit
1.008



Operation page 1, line 1




Display page 1, line 1
Valuator
1 byte
5.010



Operation page 1, line 1




Display page 1, line 1
DPT 14.xxx (floating-point
number)
4 byte
14.xxx

Weather forecast (6hr)
Text in relation to index to
day
14 byte
16.001

Continuation:
Updated: Sep-14 (Subject to change) Page 12 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
No. Object name Function
Type &
DPT
Flags
C
R
W
T
40 Operation page 1, line 1 Dimming On/Off
1 bit
1.001
 
Blinds Step/Stop
1 bit
1.001
 
41
Display page 1, line 2
See Object 39
-



Operation page 1, line 2
-




Weather forecast (6hr)
Text in relation to index to
time
14 byte
16.001

42
Operation page 1, line 2
See Object 40
-




43
Display page 1, line 3
See Object 39
-



Operation page 1, line 3
-




Weather forecast (6hr) Weather scenario as text
14 byte
16.001

44
Operation page 1, line 3
See Object 40
-




45
Display page 1, line 4
See Object 39
-



Operation page 1, line 4
-




Weather forecast (6hr)
Air temperature
46
Operation page 1, line 4
See Object 40
-




47
Display page 1, line 5
See Object 39
-



Operation page 1, line 5
-




Weather forecast (6hr) Precipitation probability
1 byte
5.001
48
Operation page 1, line 5
See Object 40
-




49
Display page 1, line 6
See Object 39
-



Operation page 1, line 6
-




Weather forecast (6hr) Precipitation amount
2 byte
9.026

50
Operation page 1, line 6
See Object 40
-




51
Display page 1, line 7
See Object 39
-



Operation page 1, line 7
-




Weather forecast (6hr) Wind force
2 byte
9.005

52
Operation page 1, line 7
See Object 40
-




53
Display page 1, line 8
See Object 39
-



Operation page 1, line 8
-




Weather forecast (6hr) Index to time
1 Byte
5.010

54
Operation page 1, line 8
See Object 40
-




55
Page 2 line 1
See Object 39
-




56
See Object 40
-




57
Page 2 line 2
See Object 39
-




58
See Object 40
-




59
Page 2 line 3
See Object 39
-




60
See Object 40
-




Updated: Sep-14 (Subject to change) Page 13 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
Continuation:
No. Object name Function
Type &
DPT
Flags
C
R
W
T
61
Page 2 line 4
See Object 39
-




62
See Object 40
-




63
Page 2 line 5
See Object 39
-




64
See Object 40
-




65
Page 2 line 6
See Object 39
-




66
See Object 40
-




67
Page 2 line 7
See Object 39
-




68
See Object 40
-




69
Page 2 line 8
See Object 39
-




70
See Object 40
-




71
Page 3 line 1
See Object 39
-




72
See Object 40
-




73
Page 3 line 2
See Object 39
-




74
See Object 40
-




75
Page 3 line 3
See Object 39
-




76
See Object 40
-




77
Page 3 line 4
See Object 39
-




78
See Object 40
-




79
Page 3 line 5
See Object 39
-




80
See Object 40
-




81
Page 3 line 6
See Object 39
-




82
See Object 40
-




83
Page 3 line 7
See Object 39
-




84
See Object 40
-




85
Page 3 line 8
See Object 39
-




86
See Object 40
-




87
Page 4 line 1
See Object 39
-




88
See Object 40
-




89
Page 4 line 2
See Object 39
-




90
See Object 40
-




91
Page 4 line 3
See Object 39
-




92
See Object 40
-




93
Page 4 line 4
See Object 39
-




94
See Object 40
-




95
Page 4 line 5
See Object 39
-




96
See Object 40
-




97
Page 4 line 6
See Object 39
-




98
See Object 40
-




99
Page 4 line 7
See Object 39
-




100
See Object 40
-




101
Page 4 line 8
See Object 39
-




102
See Object 40
-




103
Page 5 line 1
See Object 39
-




104
See Object 40
-




Updated: Sep-14 (Subject to change) Page 14 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
Continuation:
No. Object name Function
Type &
DPT
Flags
C
R
W
T
105
Page 5 line 2
See Object 39
-




106
See Object 40
-




107
Page 5 line 3
See Object 39
-




108
See Object 40
-




109
Page 5 line 4
See Object 39
-




110
See Object 40
-




111
Page 5 line 5
See Object 39
-




112
See Object 40
-




113
Page 5 line 6
See Object 39
-




114
See Object 40
-




115
Page 5 line 7
See Object 39
-




116
See Object 40
-




117
Page 5 line 8
See Object 39
-




118
See Object 40
-




119 LCD backlight Switching On/Off
1 bit
1.001

120 acoustic signal On/Off
1 bit
1.001

121 Select favourites page
Only with Varia 826 S
KNX
1 bit
1.001

122
Lock switching program
channel 2
Lock switching program =
1
1 bit
1.001

123
Lock switching program
channel 3
Lock switching program =
1
1 bit
1.001

124
Lock switching program
channel 4
Lock switching program =
1
1 bit
1.001

125
Lock switching program
channel 5
Lock switching program =
1
1 bit
1.001

126
Lock switching program
channel 6
Lock switching program =
1
1 bit
1.001

127
Lock switching program
channel 7
Lock switching program =
1
1 bit
1.001

128
Lock switching program
channel 8
Lock switching program =
1
1 bit
1.001

Table 3: Communication flags
Flag
Name
Meaning
C
Communication
Object can communicate
R
Read
Object status can be viewed (ETS / display etc.)
W
Write
Object can receive
T
Transmit
Object can send
Updated: Sep-14 (Subject to change) Page 15 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
3.2.1 Description of objects
•Object 0 "Base setpoint value"
The base setpoint value is first specified at start-up and stored in the base setpoint value.
It can be reset at any time using object 0 (limited by minimum or maximum valid setpoint
value).
If the bus supply fails, this object is backed up and the last value is restored when the bus
supply returns. The object can be described as required.
•Object 1 "Manual setpoint value adjustment"
The object receives a temperature differential in EIS 5 format. The desired room temperature
(current setpoint value) can be adjusted from the base setpoint value by this differential.
The following applies in comfort mode (heating):
current setpoint value (obj. 3) = base setpoint value (obj. 0) + manual setpoint value offset
(obj.1)
Values outside the configured range are limited to the highest or lowest value.
Remarks:
The offset always refers to the set basic setpoint value and not to the current setpoint value
value.
If a 0 is received, a previously entered setpoint value offset is
reset to 0 K.
•Object 2 "Outdoor temperature compensation"
The function of the object is determined by the setpoint adjustment with high outside
temperatures parameter on the RTR setting parameter page.
Receive only:
Receives the correction value for setpoint adjustment.
Calculate internally and send:
Reports the current setpoint adjustment as an amount or as a differential.
The format of the correction value is set on the setpoint adjustment parameter page.
Updated: Sep-14 (Subject to change) Page 16 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
Table 4
Format of
adjustment
value
Object function
Example
Absolute
Transmits the amount:
Unadjusted base setpoint value
+ setpoint correction as setpoint
value for additional temperature
controls.
Unadjusted base setpoint value =
20ºC. Set point adjustment = +2 K
The object transmits: 22 ºC
Relative
Calculated setpoint adjustment (in
Kelvin) based on outside
temperature.
Unadjusted base setpoint value =
20ºC. Set point adjustment = +2 K
The object transmits: 2 K*
•Object 3 "Current setpoint value"
This object sends the current setpoint temperature as a EIS 5 telegram (2 bytes) to the bus.
The send response can be set on the setpoint values parameter page.
•Object 4 "Actual value"
This object sends the temperature currently being measured by the sensor (if sending via
configuration is permitted).
•Object 5 "External actual value"
Receives the room temperature from another measurement point via the bus.
This object can be activated on the actual value parameter page.
•Object 6 "Sensor failure"
Reports error if the internal or external temperature sensors malfunction.
Error = 1
Updated: Sep-14 (Subject to change) Page 17 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
•Object 7 "Operating mode preset", "Night <-> standby"
The function of this object depends on the objects for setting operating mode parameter on
the RTR setting parameter page.
Table 5
Objects for determining the operating
mode
Object function
New: Operating mode, presence,
window status
Here is a 1-byte object. One of 4 operating modes
can be directly activated.
0 = Auto i.e. the operating mode depends on
the time program (channel 1)
1 = Comfort
2 = Standby
3 = Night,
4 = Frost protection (heat protection)
Values over 4 are ignored.
If the time program is locked or not used, the
configured operating mode after reset is accepted
until a new and valid operating mode is received or
the operating mode on the device is changed by the
user.
old: comfort, night, frost
With this setting, the object is a 1 bit object. Night
or standby operating mode can be activated.
0=Standby 1=Night
Updated: Sep-14 (Subject to change) Page 18 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
•Object 8 "Presence" / "comfort"
The function of this object depends on the objects for setting operating mode parameter on
the RTR setting parameter page.
Table 6
Objects for determining the operating
mode
Object function
New: Operating mode, presence,
window status
Presence:
The status of a presence detector (e.g. push button,
motion detector) can be received via this object.
1 on this object activates the comfort operating
mode.
old: comfort, night, frost
Comfort:
1 on this object activates the comfort operating
mode.
This operating mode takes priority over night and
standby modes.
Comfort mode is deactivated by sending a 0 to the
object.
Important: This object should not be sent events
cyclically as a comfort extension
is deleted (via the push button from the device) if a
0 is received.
Updated: Sep-14 (Subject to change) Page 19 of 182

VARIA 826 S KNX Multi-functional display with room thermostat
•Object 9 "Window position" / "frost/heat protection"
The function of this object depends on the objects for setting operating mode parameter on
the RTR setting parameter page.
Table 7
Objects for determining the operating
mode
Object function
New: Operating mode, presence,
window status
Window position:
The status of a window contact can be received via
this object.
1 on this object activates the frost / heat protection
operating mode.
old: comfort, night, frost
Frost/heat protection:
1 on this object activates the frost protection
operating mode.
The heat protection operating mode is activated
during cooling.
The frost/heat protection operating mode takes top
priority.
The frost/heat protection mode remains until it is
cleared again by entering 0.
•Object 10 "Time program operation mode"
Always sends the operating mode defined by the time program on channel 1.
This also applies if the room thermostat has been changed to another operating mode by a
presence sensor, push of a button etc.
•Object 11 "Time program lock"
Receive object: Lock = 1.
Makes the time program on channel 1 inoperative.
Example:
Manually set RTR to frost and lock time program before holiday period.
The frost protection operating mode remains on until the lock is lifted after the holiday period
or when frost protection is ended manually.
Updated: Sep-14 (Subject to change) Page 20 of 182