Siemens RDG400KN, Basic Documentation, Page: 19 / 87

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Siemens RDG400KN,RGD405KN Basic documentation CE1P3192en
Building Technologies 2017-02-17
If a time schedule via bus is present (e.g. from the central control unit), Auto Timer
mode is active. In that case, the thermostat changes automatically between
Comfort and Economy mode according to the time schedule via bus.
The display shows the Auto Timer mode symbol along with the symbol for the
effective room operating mode (Comfort or Economy ).
By pressing the operating mode button, another operating mode can be selected.
Each time the time schedule sends a new operating mode (switching event), the
operating mode of the thermostat is set back to Auto Timer mode. This is to ensure
that the room temperature is maintained according to the time schedule.
If the time schedule sends Precomfort mode, this mode changes either to
Economy (factory setting) or Comfort (selectable via P88).
No intervention is possible neither by the user nor by an operating mode switch-
over contact, if Protection mode is set by the time schedule.
OFF blinks on the
display when the user presses a button.
The operating mode can be selected locally via the operating mode button.
The behavior of the operating mode button (user profile) can be defined via P02
(factory setting is P02 = 1).
P02 Without time
schedule With time
schedule via bus Description
1 ⇓
⇓
∂
Switching manually between 2 modes, Economy is not
available (factory setting)
∂
Suited for hotel guest rooms or commercial buildings
∂
If a time schedule via bus is available, Comfort mode can
be temporarily extended (see below)
2 ⇓ ⇓
⇓ ⇓ ⇓
∂
Switching manually between 3 modes
∂
Suited for homes and rooms where manual switching to
Economy mode is desired
The thermostat can be forced into Economy mode (e.g. when a window is opened,
when a presence detector signals "No one present", when the keycard of a hotel
room is withdrawn, etc). The contact can be connected to digital input D1 (or
multifunctional input X1). Set P42 (P38) to 3.
If the operating mode switchover contact is active, pressing the left button will show
OFF (blinking).
The thermostat is forced into Protection mode when the window is open. The
contact can be connected to multifunctional input X1 or digital input D1. Set P38 or
P42 to 3. User operations are ineffective and
OFF displays if the window contact is
active.
The function is also available via the KNX signal "Window state", e.g. from a KNX
switch or a KNX presence detector.
Note: Only one input source must be used, either local input X1-D1or the KNX bus.
User operations are ineffective and
OFF is displayed if the operating mode switch-
over contact is active, or if "Window state" is sent via bus.
Behavior when bus
sends new operating
mode
Precomfort via bus
Behavior when bus
sends Protection
Availability of Economy
mode
Operating mode
switchover contact
(window contact)
(RDG400KN)
Window contact
(RDG405KN)
KNX
R
Room operating mode:
Window state
Auto Timer mode
with time schedule
via bus