Fault function on KNX - Basic Documentation - RDF600KN - RDF600KN/S - RDF600KN/VB

Semi-flush mount room thermostats with KNX communications RDF301, RDF301.50, RDF301.50H, RDF600KN, RDF600KN/VB, RDF600KN/S

Product Family
Desigo PX Open
Desigo Open
Product Group
Thermostats (temperature controller with sensor)
Building automation
Content Language
English
Content Type
Technical Documentation > Basic Documentation
Product Version
Status
Valid
Date
2020-02-21
Document No
CE1P3171en
Download ID
A6V10385333
Stock No.
S55770-T293
S55770-T400
S55770-T430
Product No.
RDF600KN
RDF600KN/S
RDF600KN/VB
Access level
Internet
File Type
html

If a fault occurs (e.g. digital fault input, dew point, communication configuration, etc.) then a fault will be sent on the bus.

An RDF thermostat listens on the bus and sends its fault when the fault has the highest alarm priority. This ensures that the management station does not miss any alarms.

If alarms occur at the same time, the alarm with the highest priority will be first displayed and sent on the bus.

knx-logo.png

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.

Thermostat Fault information on bus
Prio Fault Display Error code Default fault text Text adjustable *)
- No fault

---

0 No fault
1 Bus power supply**)

BUS,
BUSF

5000 No bus power supply ---
2 Device address error

Addr

6001 >1 id device address ---
3 Condensation

4930 Condensation in the room
4 External fault input X1

AL1

9001 Fault input 1
5 External fault input X2

AL2

9002 Fault input 2
6 Clean filter reminder

FIL

3911 Dirty filter

*) Default alarm texts are stored in the thermostat’s non-volatile memory and can be adjusted using the ACS commissioning tool.

**) This error will not be sent on bus (because there is no bus, not enough bus power supply, bus is overloaded or bus signal is distorted).

Priority of alarms

  • Priority order is #1…6

  • External faults #4…5: If faults are active, the display will show AL1, AL2, alternating. On the bus, only the fault with the highest priority will be sent.

knx-logo.png
Fault transmission

A supervisor alarm system may command the thermostat to stop sending faults to the bus via the communication object "Fault transmission" (disable / enable).
This has no impact on the local display of faults.

After a timeout of 48 hours, the sending of faults will automatically be enabled again.