18
Setting the parameters
Room Temperature Controller KNX eTR 101-BA2
• Version: 20.04.2021 • Technical changes and errors excepted.
7.4.1. Heating control stage 1/2
If a heating control mode is configured, one or two setting sections for the heating
stages are displayed.
In the
first
stage
, heating is controlled by a PI controller which allows to either enter
control parameters or select predetermined applications. For explanations of the pa-
rameters, see sections
PI control with controller parameters
and
the application spec-
ified.
In the
second
stage
(thus only in the case of 2-stage heating), heating 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 undershoot the second stage is added.
PI control with controller parameters
This setting allows individual input of the parameters for PI control.
Specify the deviation from the set point value at which the maximum control variable
value is reached, i.e. the point at which maximum heating power is activated.
Reset time shows how quickly the controller responds to deviations from the set point.
In the case of a short reset time, the control responds with a fast increase of the control
variable. In the case of a long reset time, the control responds slower and needs longer
until the necessary control variable for the set point deviation is reached.
You should set the time appropriate for the heating system at this point (observe the
manufacturer's instructions).
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
Control type
•
PI control
Setting of the controller by
•
Controller parameter
• Specified applications
Maximum control variable is reached
at set point/actual difference of (in °C)
1...5
Reset time (in min)
1...255; 30