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Test Mode (test, 7); Emergency Heat (8) - Siemens Desigo RXB Technical Manual

Technical manual.
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Enable function
Start function
Terminate function
Test mode
Aggregates
Soft reset
Restrictions
Siemens
Building Technologies
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).
RXB (KNX) Applications library
General / central functions
CLC and RAD description of functions for CC-02 CM110384en_03
107/140
28 Feb 2009

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