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Siemens
RDG400KN,RGD405KN Basic documentation
CE1P3192en
Building Technologies
2017-02-17
∂
Priority order is #1…5
∂
External faults #4…5: If faults are active, the display shows
AL1, AL3
alternating. On the bus, only the fault with the highest priority is sent
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, sending of faults will automatically be enabled again.
3.10.12 Emergency control (LTE-Mode only)
In case of smoke or fire, the air damper can be overridden via KNX.
The necessary information is provided by function block "HVAC Emergency Mode".
The table below describes the behavior of the controller output:
#
Data point value
Air damper
0 Normal
Normal operation
1 EmergPressure
Fully open
2 EmergDepressure
Fully closed
3 EmergPurge
Fully open
4 EmergShutdown
Fully closed
5 EmergFire
Fully closed
Emergency signals have the highest priority and command the control output
accordingly. Any ongoing function like fan-overrun, etc., is stopped immediately.
The priority is as follows:
1. Smoke
(Emergency 1...4)
2. Fire
(Emergency 5)
3. Fan
overrun
(Emergency 0 and electric heater fan overrun function is
active)
4. Normal operation (Emergency 0 and operation by operating mode button)
3.10.13 Application with VAV compact controller
(KNX LTE-Mode only)
For applications with RDG.. and VAV compact controller (KNX LTE-Mode), the
information (control signal, current air damper position) is transmitted on the KNX
bus. The communication between the devices is established by setting the KNX
parameters in the thermostat and in the VAV compact controller.
KNX parameter
RDG..
GDB..KN
GDB..KN
KNX address
0.1.2
0.1.3
0.1.4
Master/slave
Master
Slave
Type of damper actuator
Supply air
Extract air
Geographical zone (apartment)
1
1
1
Geographical zone (room)
1
1
1
Air distribution zone
5
5
5
For information on applications with supply air and extract air, refer to section 3.4.1.
For details on KNX parameters in LTE-Mode, refer to section 3.10.3.
Priority of alarms
KNX
R
Fault transmission
Example