Siemens RDG400KN Service Manual download pdf (Page 46)

46 / 78

Siemens RDG400KN Basic documentation CE1P3192en

Building Technologies Functions 20 Jul 2010

3.9 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.

For fault status messages on the bus, see section 3.10.11.

3.10 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.

3.10.1 S-mode

This mode corresponds to KNX communications.

Connections are established via ETS3 Professional by assigning communication

objects to group addresses.

3.10.2 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

KNX

Definitions

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 77 78

No comments

Siemens RDG400KN Service Manual Page 46