Siemens RDG2 KN Series Basic Documentation

Functions
KNX communications
4
A6V11545892_en--_c
125 | 180
Example of heating and cooling demand zones [➙ 123].
In S-Mode, the current state signals of the control outputs are available.
4.12.10 Fault and alarms function on KNX
A fault is sent on the bus in the event of a fault occur (for example, digital fault
input, Dewpoint, communication configuration, etc.).
An RDG2..KN room thermostat monitors the bus and sends its fault, if the fault has
the highest alarm priority. This ensures that the management station does not miss
any alarms.
The alarm with the highest priority is displayed first and sent over the bus if alarms
occur at the same time.
Fault transmission is different in LTE-Mode and S-Mode:
S-Mode
LTE-Mode
Fault state
Alarm info (error code + internal
information)
Fault information (internal information)
Alarm text (default text can be edited
with ACS tool)
The table below shows the error code and default alarm texts.
Priorities
Fault
Thermostat
Fault information on
bus
Display
Error code
Default
fault text
Text
adjustable
1)
-
No fault
---
0
No fault
✓
1
Bus power
supply
2)
BUS
5000
No bus
power
supply
---
2
Device
address error
Addr
6001
>1 id device
address
---
3
Condensation
COND
4930
Condensati
on in the
room
✓
4
External fault
input X1
AL1
9001
Fault input 1
✓
5
External fault
input X2
AL2
9002
Fault input 2
✓
6
External fault
input U1
AL3
9003
Fault input 3
✓
7
Clean filter
reminder
FIL
3911
Dirty filter
✓
1)
Default alarm texts are stored in the thermostat’s non-volatile memory and can
be adjusted using the ACS commissioning tool.
2)
This error is not sent over the bus (because there is no bus, not enough bus
power supply, bus is overloaded or bus signal is distorted).

Siemens RDG2 KN Series Specifications

General

Brand	Siemens
Model	RDG2 KN Series
Category	Thermostat
Language	English