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Parameter setting
Sensors Intra-Sewi KNX T and Intra-Sewi KNX TH
• Version: 11.06.2018 • Technical changes and errors excepted.
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 va-
riable follows the rule again.
5.5.3. Cooling control level 1/2
If a cooling control mode is configured, one or two setting sections for the cooling le-
vels 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. abo-
ve 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
urgently and needs longer until the necessary control variable for the setpoint value
deviation is reached. You should set the time appropriate to the cooling system at this
point (observe manufacturer's instructions).
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
Maximum control variable is reached
at setpoint/actual difference of (in °C)
1...5
Reset time (in min.)
1...255; 30
Summary of Contents for Intra-Sewi KNX T
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