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Siemens
RDG400KN,RGD405KN Basic documentation
CE1P3192en
Building Technologies
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2017-02-17
Obj
Object name
Function
Type/length
Flags
Indicates the position of the cooling actuator of the first stage.
E.g. single-duct with h/c coil application: Output of the cooling coil
28
Enable electric
heater
Enable/
disable
1.003
1 bit
CWU
An electric heater can be disabled with this communication object
(e.g. to meet tariff regulations).
The same function is also available via local multifunctional input
X1-D1 (P38, P42).
Only one input source must be used, either local input X1/D1or
KNX bus.
29
Heating/cooling
changeover
Heating/
cooling
1.100
1 bit
CWU
Changeover information transmitted via bus. Only available with
application "Single-duct with heating/cooling coil".
Default: Current mode before power down.
The same function is also available via local multifunctional input
X1-D1 (P38, P42).
Only one input source must be used, either local input X1/D1or
KNX bus.
30
Supply air
temperature
Temp.
value
9.001
2 Byte
CWU
The supply air temperature sent by the supply air controller
indicates whether cold or hot air is supplied (for VAV changeover).
The controller determines the necessity to open or close the air
damper according to the supply air temperature, the room tempe-
rature setpoint, and the current room temperature.
The same function is also available via local multifunctional input
X1-D1 (P38, P42).
Only one input source must be used, either local input X-D1or KNX
bus.
31
Application mode
HVAC
control
mode
20.105
1 Byte
CWU
0 Auto
(default)
Heating and/or cooling
1 Heat
Heating only
2 Morning
warmup*
Heating only
3 Cool
Cooling only
4 Night
purge
Open air damper fully
5 Precool*
Cooling only
6 OFF
Neither heating nor cooling
8 Emergency
heat*
Heating only
9 Fan
only
Open air damper fully (= night
purge)
* Function handled like Heat (1) or Cool (3)
32
X1: Temperature
Temp.
value
9.001
2 Byte
CRT
Indicates the values of the temperature sensors connected to the
local inputs X1
33
37
X1: Digital
D1: Digital
ON
OFF
1.001
1 bit
CRT
Indicate the status of the digital inputs (adjusted via P39…P43)
including considering the operating action
36
U1: 0..10V
0…100% 5.001
8 bit
CRT
DC 0…10 V at input U1 is indicated as a value 0…100%
38
Outside
temperature
Temp.
value
9.001
2 Byte
CWU
The outside temperature acquired by a KNX sensor can be
displayed on the thermostat, if P07 "Additional user information” is
set = 2 (outside temperature).
The following objects are only available on RDG405KN
21
Room temperature
(RDG405KN)
Temp.
value
9.001
2 Bytes
CRT
The value of the room temperature measured via built-in or
external sensor is available on bus when this communication
object is set to
Transmit
.
By setting the object to
Receive
, the thermostat receives and
works with the room temperature from an external sensor
39
Presence Sensor
1.018
1 bit
CWU
Room operating mode : Presence detector
Switch the device to Comfort mode
40
Room tempera-
ture: economy
heating setpoint
Temp.
value
9.001
2 bytes
CWU
Communication object to adjust the Economy heating setpoint
used by the thermostat (see section 3.3.2). It directly changes the
value of the local parameter "Economy setpoint" P11.
S-Mode object needs to be enabled by setting
Room temp.:
Economy setpoints
to
as group object
in ETS.
The Economy setpoint is stored in EEPROM. The service life of
the EEPROM depends on the number of write cycles. Never write
this communication object cyclically.
41
Room tempera-
ture: Economy
cooling setpoint
Temp.
value
9.001
2 bytes
CWU
Communication object to adjust the Economy cooling setpoint
used by the thermostat (see section 3.3.2). It directly changes the
value of the local parameter "Economy setpoint" P12.
S-Mode object needs to be enabled by setting
Room temp.:
Economy setpoints
to
as group object
in ETS.
The Economy setpoint is stored in EEPROM. The service life of
the EEPROM depends on the number of write cycles. Never write
this communication object cyclically.
42
Supply air : limit
value min (%)
0…100% 5.001
1 Byte
CWU
The output signal for the air flow can be limited to a minimum
value (P63)
43
Supply air: Limit
value max. (%)
0…100% 5.001
1 Byte
CWU
The output signal for the air flow can be limited to a maximal value
(P64)
44
IAQ: CO
2
concentration
ppm
value
2 bytes
CWT
CO
2
concentration in ppm.
Range :0…5000 ppm
