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Parameter setting
Sensors Sewi KNX AQS and Sewi KNX AQS/TH-D
• Version: 10.09.2018 • Technical changes and errors excepted.
Controller setpoint
The setpoint values can be set directly in the application program using parameters, or
be defined via the bus using a communication object.
Setpoint value setting using parameters:
Set the setpoint value directly.
Setpoint value setting via communication object:
Enter, how the setpoint value will be received from the bus. Basically, a new value can
be received, or simply a command to increase or decrease.
During initial commissioning, a setpoint value must be defined which is valid until the
first communication of a new setpoint value. For units which have already been taken
into service, the last communicated setpoint value can be used. Basically, an air humi-
dity range is given in which the setpoint value can be changed (object value limit).
A set setpoint value will be retained until a new value or a change is transferred. The
current value is saved, so that it is retained in the event of a power supply failure and
will be available once the power supply is restored.
Send status object(s)
• on change
• on change to 1
• on change to 0
• on change and periodically
• on change to 1 and periodically
• on change to 0 and periodically
Cycle
(
if sent periodically)
5 s • 10 s • … • 2 h
Specified setpoint using
Parameter
• Communication objects
Target value in ppm
400…5000; 800
Threshold value setting using
Parameter •
Communication objects
The last communicated value should be
retained
• never
• after power supply restoration
• after power supply restoration and
programming
Start setpoint value in ppm
valid until first communication
(not upon saving the setpoint value after
programming)
400… 2000; 800
Object value limit (min) in 0.1°C
400…2000; 400
Object value limit (max) in 0.1°C
400…2000; 1500
Type of threshold value change
Absolute value • Increase/decrease
Increment in ppm
(upon increase/decrease change)
1 • 2 • 5 • ... • 20 • ... • 100 • 200
