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Parameter settings
Interface KNX B8-TH
• Version: 24.08.2016 • Technical changes and errors excepted.
If separate control variables are used, select whether the control variable of the 2nd
level is a 1 bit object (on/off) or an 8 bit object (on with percentage/off).
Now specify what should be sent when the control is blocked. Set a value greater 0
(=OFF) to receive a basic heating level, e.g. for floor heating. On release, the control
variable follows the rule again.
5.5.2. Cooling control level 1/2
If a cooling control mode is configured, one or two setting sections for the cooling lev-
els are displayed.
In the 1st level, cooling is controlled by a PI control in which either control parameters
can be entered or predetermined applications can be selected.
In the 2nd level (therefore only for 2-level cooling), cooling is controlled via a PI or a 2-
point-control.
In level 2, the setpoint deviation between the two levels must also be specified, i.e.
above which setpoint value deviation the second level is added.
PI control with control parameters:
This setting allows individual input of the parameters for PI control.
Specify the deviation from the setpoint value which reaches maximum variable value,
i.e. the point at which maximum cooling power is activated.
The reset time shows how quickly the controller responds to deviations from the set-
point value. In case of a short reset time, the control responds with a fast increase of
the control variable. In case of a long reset time, the control responds somewhat less
Control variable is a
• 1 bit object
• 8 bit object
Value (in %)
(for 8 bit object)
0...100
When blocked, the control variable shall
• not be sent
• send a specific value
Value (in %)
only if a value is sent
0...100
Setpoint difference between 1st and 2nd
level (in 0.1°C)
(for level 2)
0...100; 40
Control type
(for level 2, no common control variables)
• 2-point-control
• PI control
Control variable is a
(for level 2 with 2-point controlling, no
common control variables)
• 1 bit object
• 8 bit object
Control type
•
PI control
Setting of the controller by
•
Controller parameter
• specified applications
