Application Mode - Siemens RDF800KN Series Manual

Application mode

ACS
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Siemens
Smart Infrastructure
3.6.2 Application mode
The behavior of the thermostat can be influenced by a building automation and
control system (BACS) via the bus using the "Application mode" command.
With this signal, cooling and/or heating mode can be enabled or disabled.
Application mode is supported in LTE mode and S-mode.
The RDF800KN../RDF800KN/VB/RDD810KN.. room thermostats support the
following commands:
No. Application Description
mode
0 Auto Thermostat automatically
changes between heating and
cooling
1 Heat Thermostat is only allowed to
heat
2 Morning If "Morning warm-up" is
warm-up received, the room should be
heated up as fast as possible (if
necessary). Thermostat only
allows heating
3 Cool Thermostat is only allowed to
provide cooling
4 Night purge Not supported by fan coil
applications
5 Pre-cool If "Pre-cool" is received, the
room should be cooled down as
fast as possible (if necessary).
The thermostat will only allow
cooling
6 OFF Thermostat is not controlling the
outputs, which means all
outputs go to off or 0%
8 Emergency Thermostat should heat as
heat much as possible. It only allows
heating
9 Fan only All control outputs are set to 0%
and only the fan is set to high
speed.
This function is terminated by
any operation on the thermostat
1)
RDD810KN/NF thermostat turns off the heating output.
With all other commands, the thermostat behaves like in Auto mode, such as,
heating or cooling according to demand.
The state (heating or cooling) of the thermostat can be monitored with the ACS tool
(diagnostic value "Control sequence"). The last active mode is displayed when the
thermostat is in the dead zone or when room temperature control is disabled.
RDF800KN.., RDF800KN/VB, RDD810KN/NF
Control
sequence
enabled
(RDF800..)
Heating
and/or cooling
Heating only
Heating only
Cooling only
N/A (= Auto)
Cooling only
Neither heating nor cooling
Heating only
Run fan in
high speed
Basic documentation
Control
sequence
enabled
(RDD810..)
Heating or
1)
Heating OFF
1)
Heating OFF
1)
Heating OFF
1)
Heating OFF
CE1P3174en
2020-02-21