Basic Documentation

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Siemens VAV compact controller KNX/PL-Link G..B181.1E/KN CE1P3547en
Smart Infrastructure 2021-10-25
9 Datapoints and function description
9.1 Device Parameters (ACS931 / ACS941 / AST20)
Parameter
Range
Description
Factory
setting
Setpoint
0..100%
Setpoint to VAV controller.
0% → Vmin
100% → Vmax
N/A
Actual position
0..100%
Damper position, depends on setting for position
adaptation
N/A
Actual Flow abs.
0..65’535 m
3
/h
Actual volume flow in m
3
/h or l/s
N/A
Actual Flow %
0..100%
Actual volume flow relative to Vnom in %
N/A
Actual pressure
0..300 Pa
Actual differential pressure
N/A
Override control
Open / Close /
Stop / Min / Max
Override control from config. / maintenance tool
N/A
Operating mode
VAV / POS
VAV = Setpoint 0..100% volume flow
POS = Setpoint 0..100% damper position
VAV
Opening direction
CW / CCW
Opening direction of air damper
CW
Positioning
Absolute /
Adaptive
Adaption of actual opening range to position
feedback
1)
Off = No adaptation / mapping 0°...90°
→ 0..100 %
On = Pos. adaptation / mapping e.g. 0°...60°
→ 0..100 %
Absolute
Vmin
-20..100%
Minimum air volume flow
0 %
Vmax
20..120%
Maximum air volume flow
100 %
Vnom
0..65‘535 m
3
/h
Nominal air volume flow
2)
100 m
3
/h
Vn (Coefficient)
1..3.16
Characteristic value for the VAV box; set by the
OEM
1.00
dpnom
30..300 Pa
Nominal differential pressure, corresponds to Vn
300 Pa
Altitude asl.
0..5000m, in
500m steps
Altitude level correction, select n*500m value
closest to altitude of installation
500 meters
Unit vol. flow
m
3
/h / l/s
Unit in which the volume flow is displayed
m
3
/h
Unit Vmin & Vmax
%, m
3
/h or l/s
Unit in which Vmin / Vmax are entered
%
1)
Adaptive positioning must not be activated while the actuator is mechanically jammed
2)
Value used for displaying / not used for volume flow control loop
Some parameters are also available as ETS parameters. In this case, the ETS
parameter setting overwrites the setting made with a configuration tool.
Note