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2-point-rule (only level 2):
The 2-point-rule is used for systems which are only set to ON or OFF.
Control type
is determined at a higher level for common
variables
Enter the hysteresis that prevents frequent on/off switching of temperatures in the
threshold range. Then determine whether a 1 bit object (on/off) or an 8 bit object (on
with percentage/off) should be used.
Hysteresis (in 0.1°C)
Actuating variable is a
Value (in %)
only for 8 bit objects
Now determine what should be transmitted when the control is blocked. Set a value
greater 0 (=OFF) to receive a basic heating level, e.g. for floor heating.
Upon release, the control variable follows the rule again.
When blocked, the variable shall
Value (in %)
only if a value is transmitted
4.4.4. Cooling control level 1/2
If a cooling control mode is configured, one or two setting sections for the cooling
levels are displayed.
On the 1st level, cooling is controlled by a PI control which allows to either enter
control parameters or select predetermined applications.
On the 2nd level (therefore only in case of a 2 level cooling), cooling is controlled via a
PI or a 2-point-control.
On level 2, the set point deviation between the two levels must furthermore be
determined, i. e. the highest set point value from which the 2nd level is then added
(when values exceed this set point).
Set point difference between levels 1 and 2
(in 0.1°C)
only for level 2
Control type
only for level 2 and if no common variables
are used
PI control with control parameters:
This setting allows individual input of the parameters for PI control.
Control type
KNX K8 actuator • Status: 18.11.13 • Technical Changes and Errors excepted.
20
• 2-point control
0...100; 20
• 1-bit object
• 8-bit object
0...100
• not be transmitted
• send a specific value
0...100
0...100; 40
• 2-point control
• PI control
• PI control
Parameter setting
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