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Siemens
RXB (KNX) application library
FNC Description of functions for FC-10, FC-11, FC-12 CM110385en_05
Building Technologies
General and central functions
28 Feb 2009
State
Description
See
section
Para-
meter
0 = Auto
Controller operating normally.
1 = Heat
Controller can operate in heating mode only;
cooling sequence disabled.
--
2 = Morning Warmup Boost heating.
*134
3 = Cool
Controller can operate in cooling mode only;
heating sequence disabled.
--
4 = Night Purge
Night purge:
Precool room with fan (no cooling coil) (only
FNC10, FNC12 with outside air damper)
*138
5 = Precool
Precool:
Precool the room with fan, cooling coil and
outside air damper.
*135
6 = Off
The temperature control is disabled.
The remaining functions are active.
Communications are operating as normal.
--
7 = Test *)
All functions disabled.
Motorized valve and damper actuators
synchronized.
Outputs can be overridden via KNX bus.
8 = Emergency Heat Emergency heating (always enabled).
9 = Fan only
Rapid ventilation (formerly Air flush)
Max. ventilation using outside air (FNC10,
FNC12 with outside air damper only).
*136
10 = Freecool
Free cooling:
•
During Economy. Precool room using
cooling coil (low energy tariffs).
•
During Comfort normal mode.
*135
*) Exit from Test mode (7) is only possible with sequence Off (6) + normal mode (0).
Triggering the special functions by the building automation and control system can be
disabled in each room controller via tool.
ETS3 Professional Go to the Functions menu for the disable feature.
HandyTool
See parameters in the last column of the above table.
11.8 Boost heating (Morning Warmup, 2)
This function is used to raise the temperature in a room as quickly as possible to the
Precomfort
heating setpoint at the end of the night setback period.
Objective: Preheat the room for heating.
Description of the
various modes
Disable special
functions
