Valve Exercising Feature; Override Valve Actuators - Siemens Desigo RXB Technical Manual

HandyTool
Short name
Bus valve heating output
Bus valve cooling output
K N X
CO
R
Note
Siemens
Building Technologies
See Parameters in the last column of the table below
Range
0 = disabled / Off
1 = enabled / On
0 = disabled / Off
1 = enabled / On
8.1.6

Valve exercising feature

To prevent valves from seizing after long periods of inactivity (e.g. cooling valves in
winter) the valves are operated from time to time. The valve actuators are operated in
such a way as to waste as little heating or cooling energy as possible.
The valve exercise function is triggered if the valve has been closed for ca. 91 hours
without interruption.
8.1.7

Override valve actuators

For test purposes, the valve actuators can each be overridden individually via the
following communication objects:
Heating valve override (Input communication object)
Cooling valve override (Input communication object)
Flags Type
R W C T U
0 1 1 0 0 8.010
DPT_Percent_V16
Before the valve actuators can be overridden, the "Test" mode must be activated via
the communication object Application mode (see page 128).
The valve is operated in accordance with the settings shown below:
Heating Cooling
value value
Invalid Invalid
Valid
Invalid
Invalid Valid
Valid Valid
RXB (KNX) application library
Control sequences
Receive timeout
no
Control
-----
Heating
Cooling
Thermal actuators:
Heating and cooling alternately, with the
Heating value
Motorized actuators:
Heating and cooling valve driven to the
Heating position
FNC Description of functions for FC-10, FC-11, FC-12
Basic setting HandyTool
disabled (0) *085
disabled (0) *087
Value
0...100% 0 = 0%
+100 = +100%
+32767 = invalid
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28 Feb 2009
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