Technical data

3.10 Handling faults
When the room temperature is outside the measuring range, i.e. above 49 °C or
below 0 °C, the limiting temperatures blink, e.g. "0 °C" or "49 °C".
In addition, the heating output is activated if the current setpoint is not set to "OFF",
the thermostat is in heating mode and the temperature is below 0 °C.
For all other cases, no output is activated.
The thermostat resumes Comfort mode after the temperature returns to within the
measuring range.
When the built-in sensor fails and no external sensor is connected, the thermostat
shows the fault message "Er1" on the display. The thermostat needs to be replaces
if the room temperature needs to be measured with the built-in sensor.
For fault status messages on the bus, see section 3.11.8.
3.11 KNX communications
The RDG KNX thermostats support communications as per the KNX specification.
S-mode Standard mode; engineering via group addresses.
LTE mode Logical Tag Extended mode, for easy engineering,
is used in conjunction with Synco.
3.11.1 S-mode
This mode corresponds to KNX communications.
Connections are established via ETS by assigning communication objects to group
addresses.
3.11.2 LTE mode
LTE mode was specifically designed to simplify engineering. Unlike with S-mode,
there is no need to create the individual connections (group addresses) in the tool.
The devices autonomously establish connections.
To make this possible, the following circumstances are predefined:
• Every device or subdevice is located within a zone
• Every data point (input or output) is assigned to a zone
• Every data point (input or output) has a precisely defined "name"
Whenever an output and an input with the same "name" are located in the same
zone, a connection is established automatically, as shown in the following diagram.
Temperature out
of range
Fault "Er1" on display
KNX
R
Definitions
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Siemens RDG100KN, RDG160KN Basic documentation CE1P3191en
Building Technologies Functions 2014-05-23