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Siemens
RXB (KNX) Applications library
CLC and RAD description of functions for CC-02 CM110384en_03
Building Technologies
General / central functions
28 Feb 2009
The following condition must be fulfilled:
•
The room controller must be in
Economy
or
Precomfort
room operating mode.
The function can be disabled in the room controller via ETS3, together with free
cooling; see central functions on page 100.
The function must be enabled via the building automation and control system
(communication object
Application mode
, see page 105).
The function is disabled via the building automation and control system.
10.10 Test mode (Test, 7)
The following override functions are used to commission the controller and for service
purposes, e.g. to test a valve actuator.
The controller must first be switched to HVAC test mode by transmitting the value
7 =TEST via
Application mode.
To exit test mode, send first
Application mode
= 6, OFF and then = 0, AUTO.
In test mode, valve actuators can be se to defined values via KNX bus signals.
A soft reset is carried out after the controller exits test mode:
•
Motorized valve actuators and dampers are synchronized.
•
Thermal valves are synchronized.
•
The control algorithm but not the entire application is restarted.
Test mode is available only for S-mode objects!
10.11 Emergency heat (8)
This function is used for emergency heating when the room temperature drops below
the
Risk of frost limit
value. The function depends on the Effective room operating
mode.
The function affects control of all installed heating aggregates.
When using a radiator and a heated ceiling the valve opens fully.
An electric radiator is switched to the highest stage and is maintained there until the
temperature rises above the
Protection
heating setpoint again.
When the room temperature rises above the
Protection
setpoint, the controller reverts
to the original application mode (see page 105).
Enable function
Start function
Terminate function
Test mode
Aggregates
Soft reset
Restrictions