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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.
gramming" should not be used for the initial start-up, as the factory settings are always
used until the first call (setting via objects is ignored).
Select the type of measured value for the calculation of the threshold value (see
Infor-
mation on air pressure
)
Select whether the threshold value is to be specified per parameter or via a communi-
cation object.
When the
threshold value per parameter
is specified, then the value is set.
When the
threshold value per communication object
is specified, the starting
value, object value limit and type of change to the threshold value are then set.
With both of the methods for specifying the threshold values the hysteresis is set.
Switching output
Define which value the output transmits if the threshold value is exceeded or undercut.
Set the delay for the switching and in which cases the switch output transmits.
Maintain the
threshold values and delays received via
communication object
• never
• after power supply restoration
• after power supply restoration and
programming
Type of measurement for threshold value
calculation
• Normal air pressure
• Barometric pressure
Threshold value setpoint using
Parameter • Communications object
Threshold value in 10 Pa
3000 … 11000; 10200
Start threshold value in 10 Pa
valid until first call
3000 … 11000; 10200
Object value limit (min.) in 10 Pa
3000 … 11000
Object value limit (max.) in 10 Pa
3000 … 11000
Type of threshold change
Absolute value • Increase/decrease
Step size
(upon increase/decrease change)
10 Pa • 20 Pa • 50 Pa • 100 Pa • 200 Pa •
500 Pa
Hysteresis setting
in % • absolute
Hysteresis in % (relative to threshold value)
(for setting in %)
0 … 50; 20
Hysteresis in 10 Pa
(for absolute setting)
0 … 11000; 100
When the following conditions apply,
the output is
(LV = Threshold value)
• GW above = 1 | GW - Hyst. below = 0
• GW above = 0 | GW - Hyst. below = 1
• GW below = 1 | GW + Hyst. above = 0
• GW below = 0 | GW + Hyst. above = 1