K N X
Reducing the bus load
HandyTool See parameters in the last column of the following table.
Heating surface outp bus valve
Position values for tediator valve actuators
The "position" of the radiator is mapped to the bus. See also section 8.1.5.
The Heating surface output communication object must NOT be used for applications
for thermal valve actuators to control KNX/EIB valve actuators. With these applications,
the communications objects have theoretical valve positions only.
In S-mode, the following communication object is used for this purpose:
Heating surface output (Output communication object)
R W K T U
1 0 1 1 0 5.001
In LTE mode, the "position" of the radiator is transmitted as follows:
Heating surface output (Output)
If the LTE bus information is not required, it can be disabled (see pages 90 and 143 for
notes on reducing the load on the bus).
0 = Disabled / Off
1 = Enabled / On
This application can have two different heat demand signals; one from the air-to-air
heat exchanger and one from the radiator. In KNX –LTE mode, the demand signals are
mapped as 2 bus signals (see 11.5 , Heating and cooling demand ).
In S-mode, this demand is summarized in Heating demand room .
Radiator valve actuator override
See also section 8.1.7.
RXB (KNX) application library
Possible partner function blocks
HVAC Valve Actuator
FNC Description of functions for FC-10, FC-11, FC-12
0 = 0%
255 = 100%
28 Feb 2009