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KNX S-mode communication object
Obj.
Object Name
4
Fault information
5
Fault state
6
Fault transmission
Room operating mode:
7
Preselection
Room operating mode:
8
Preselection Auto
Room operating mode:
9
Preselection Comfort
Room operating mode:
10
Preselection Economy
Room operating mode:
11
Preselection Protection
Room operating mode:
12
Time switch
Room operating mode:
13
Time switch Comfort
Room operating mode:
14
Time switch Economy
Room operating mode:
15
Time switch Protection
Room operating mode:
16
State
Room operating mode:
17
State Comfort
Room operating mode:
18
State Economy
Room operating mode:
19
State Protection
Room operating mode:
20
Window state
21
Room temperature
Room temp: Comfort
22
basic setpoint
Room temp: Comfort
23
setpoint
Room temp: Current
24
setpoint
Heating output
25
primary
VRF Operating Mode:
31
State
33
* )
Fan operation
Siemens
Building Technologies
Function
Type
Length
alarm info
219.001
6 bytes
faulty/normal
1.005
1 bit
enable/disable
1.003
1 bit
20.102
1 byte
HVAC mode
switch
1.001
1 bit
switch
1.001
1 bit
switch
1.001
1 bit
switch
1.001
1 bit
20.102
1 byte
HVAC mode
switch
1.001
1 bit
switch
1.001
1 bit
switch
1.001
1 bit
Comfort
Economy
20.102
1 byte
Protection
switch
1.001
1 bit
switch
1.001
1 bit
switch
1.001
1 bit
open/close
1.019
1 bit
temperature
9.001
2 bytes
value (°C)
temperature
9.001
2 bytes
value (°C)
temperature
9.001
2 bytes
value (°C)
temperature
9.001
2 bytes
value (°C)
percentage
5.001
1 byte
(0..100%)
HVAC
20.105
1 byte
control mode
1.001
1 bit
switch
RDF880KN...
Touch Screen Flush-mount Room Thermostats with KNX Communications
Descriptions / Selections:
CRWTU
visibility depends on DIP switch setting
CONTROL: all DIP switch Settings
CT
It is a command to send out common alarm output in alarm numbers/codes.
CONTROL: all DIP switch Settings
CT
It is a command to set the alarm flag if an alarm occurs.
STATUS: all DIP switch Settings
A value (enable or disable) is received from a supervisory alarm system to enable
CWU
or disable the broadcasting of alarms by the devices. This has no impact on the
local display of alarms. The sending of faults/alarms will be enabled automatically
after time out (48 hours).
CONTROL/STATUS: use for DIP switch Setting à 1: UFH, 3: BOTH
To change or to receive the room operating mode selection via the bus.
CWTU
Note: The thermostat will switch from Precomfort to Economy or Comfort mode
(selectable via P88).
CW
STATUS: use for DIP switch Setting à 1: UFH, 3: BOTH
CW
The value is received to switch the room operating mode to Auto, Comfort,
CW
Economy or Protection.
CW
STATUS: use for DIP switch Setting à 1: UFH, 2: VRF
A time schedule defining the required operating modes is provided by a central
CWU
time switch or a supervisor.
Protection mode has the highest priority and cannot be overridden. (also refer to
P88 - Precomfort à Economy or Comfort)
CW
STATUS: use for DIP switch Setting à 1: UFH, 2: VRF
The value is received to switch the room operating mode to Auto, Comfort,
CW
Economy or Protection according to a time schedule provided by a central time
switch or a supervisor.
CW
CONTROL: use for DIP switch Setting à 1: UFH, 3: BOTH
CRT
It is a command to set the operating mode to Comfort, Economy or Protection
depending on user selection, window contact, etc.
CT
CONTROL: use for DIP switch Setting à 1: UFH, 3: BOTH
CT
it is a command to switch the room operating mode to Comfort, Economy or
Protection.
CT
STATUS: all DIP switch Settings
A value "1" (open) is received to set operating mode to Protection (UFH) or Off
(VRF) i.e. UFH to Protection, VRF to Off.
CWU
A value "0" (close) is received to switch back to the previous operating mode
"Window state" is received from a KNX control device or via the local window
contact X1, X2 (P38, P40).
Note: Only one input source must be used, either local input X1/X2 or KNX bus.
CONTROL: all DIP switch Settings
CRT
It is a command to send out the current room temperature measured using built-
in or external sensor (via X1 or X2).
STATUS: all DIP switch Settings
If temporary setpoint function is enabled (P69=ON), after any operating mode
CWU
changes, the setpoint will be reset to the Comfort basic setpoint.
Note: User setpoint via the local HMI may be overwritten during a system startup
from a central control unit, e.g.RMB795B.
CONTROL/STATUS: all DIP switch Settings
Communication object is used to shift the setpoint for the thermostat. Same
CWTU
priority as local setpoint shift on the thermostat.
Note: The Comfort basic setpoint (object 22) is not changed.
CONTROL: all DIP switch Settings
It is the command to send out for the current setpoint under current operating
CRT
mode, including shift, compensation, etc., used by the thermostat for room
temperature control.
CONTROL: use for DIP switch Setting à 1: UFH, 3: BOTH
CRT
It is a command to send out to indicate the current position of the heating
actuator when UFH is active.
STATUS: all DIP switch Settings
CWU
The value of the VRF operating mode is set by a KNX control device.
0 - Auto; 1 - Heat; 3 - Cool; 9 - Fan; 14 - Dry
CONTROL/STATUS: use for DIP switch Setting à 2: VRF
CRWTU
It is a command to set the current fan mode to the VRF: Auto (0); Manual (1).
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A6V11282546_en--_a
2018-04-19
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