20
Setting the parameters
Room Temperature Controller KNX eTR 101-BA2
• Version: 20.04.2021 • Technical changes and errors excepted.
Enter the hysteresis that prevents frequent on/off switching of temperatures within the
threshold range.
If separate actuating variables are used, the choose if the actuating variable of the 2nd
stage 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 than
0 (=OFF) to get a basic heating stage, e.g. for floor heating. On release, the control var-
iable follows the rule again.
7.4.2. Cooling control stage 1/2
If a cooling control mode is configured, one or two setting sections for the cooling stag-
es are displayed.
In the
first
stage
, cooling is controlled by a PI controller in which either control param-
eters or predetermined applications can be selected. For explanations of the parame-
ters, see sections
PI control with controller parameters
and
the application specified.
In the
second
stage
(thus only in the case of 2-stage cooling), cooling is controlled via
a PI or a 2-point-control. For explanations of the parameters, see the corresponding
sections.
On stage 2, the set point deviation between the two stages must also be specified, i.e.
beyond which set point value undershoot the second stage is added.
PI control with controller parameters
This setting allows individual input of the parameters for PI control.
Hysteresis (in 0.1°C)
0...100; 20
Control variable is on
• 1-bit object
• 8-bit object
Value (in %)
(with 8-bit object)
0...100
When blocked, the control variable should
• not be sent
• send a specific value
Value (in %)
only if a value is sent
0...100
Setting of the controller by
• Controller parameter
• Specified applications
Set point difference between 1st and 2nd
stages (in 0.1°C)
(for stage 2)
0...100; 40
Control type
(for stage 2, no shared actuating variables)
• 2-point control
• PI control
Control variable is on
(for stage 2 with 2-point control, no shared
actuating variables)
• 1-bit object
• 8-bit object
