14
Parameter setting
KNX K8 actuator
• Status: 18.11.13 • Technical Changes and Errors excepted.
The
mode
may be switched with two 8 bit objects of different priority. Objects
"... HVAC mode (Prio 2)" for switching in everyday operation and
"... HVAC mode (Prio 1)" for central switching with higher priority.
The objects are coded as follows:
Alternatively, you can use three objects, with one object switching between eco and
standby mode and the two others are used to activate comfort mode or frost/heat
protection mode. The comfort object then blocks the eco/standby object, and frost/heat
protection objects have the highest priority. Objects
"... Mode (1: Eco, 0: Standby)",
"... comfort activation mode" and
"... frost/heat protection activation mode"
Select the mode to be activated after reset (e.g. power failure, reset of the line via the
bus). (Default).
Then configure a block of the temperature control by the blocking object.
Determine when the current settings of the controls are to be transmitted to the bus.
Periodic transmission is safer if a message does not reach a recipient. You may also
set up periodical monitoring by the actuator with this setting.
The status object shows the current status of the output variable (0 = OFF,
>0 = ON) and may, for example, be used for visualisations or to switch off the heating
pump as soon as the heating is off.
ID
Name
Encoding
Range
Use
20,102
DPT_HVACMode
field1 = HVACMode
0 = Auto
1 = Comfort
2 = Standby
3 = Economy
4 = Building Protection
[0 … 4]
HVAC
Switch mode via
• two 8-bit objects (HVAC modes)
• three 1-bit objects
Mode after reset
• Comfort
• Standby
• Eco
• Building protection
Behaviour of the blocking object at value
• 1 = block | 0 = release
• 0 = block | 1 = release
Blocking object value
before 1st communication
0 • 1
Send actuating variables
• on change
• on change and periodically
cycle
for periodical transmission only
5 s • ... • 5 min • … • 2 h
