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Parameter settings
Interface KNX B8-TH
• Version: 24.08.2016 • Technical changes and errors excepted.
5.5.1. Heating control level 1/2
If a heating control mode is configured, one or two setting sections for the heating lev-
els are displayed.
In the 1st level, heating is controlled by a PI control, which allows to either enter control
parameters or select predetermined applications.
In the 2nd level (therefore only in case of 2-level heating), heating is controlled via a PI
or a 2-point-control.
In level 2, the setpoint difference between the two levels must also be specified, i.e. be-
low which setpoint 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 at which the maximum control variable
value is reached, i.e. the point at which maximum heating 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
urgently and needs longer until the necessary control variable for the setpoint value
deviation is reached.
You should set the time appropriate to the heating system at this point (observe man-
ufacturer's instructions).
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.
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
Maximum control variable is reached
at setpoint/actual difference of (in °C)
0...5
Reset time (in min.)
1...255; 30
When blocked, the control variable shall
• not be sent
• send a specific value
Value (in %)
(if a value is sent)
0...100
