Basic Documentation

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Siemens VAV Compact Controller Modbus RTU A6V10631862_en--_e
Smart Infrastructure 2021-10-26
5 Parameterization and operating modes
5.1 Settings and user interaction
5.1.1 Device parameters
The OEM generally provides the basic configuration to VAV Compact Controllers,
esp. the parameters Vn and Vnom. The basic configuration is independent of the
system environment where the VAV Compact Controllers are to be used.
For parameter setting, configuration and maintenance tools as described in section
5.1.2 are available. The following parameters must be checked or set prior to com-
missioning and be documented in the plant documentation. Please refer to section
9.3 for more explanation.
Parameter
Range
Description
Factory setting
Operating
mode
VAV (flow ctrl.) /
POS (position
ctrl.)
Interpretation of setpoint
VAV = Setpoint controls volume flow [%]
POS = setpoint controls damper position [%]
VAV
Opening
direction
CW (R) /
CCW (L)
Opening direction of air damper
CW (R)
Adaptive
positioning
Off / On
Adaption of actual opening range to position
feedback
1)
Off = mapping 0°...90° → 0..100 %
On = mapping e.g. 0°...60° → 0..100 %
Off
Vmax
20…120%
Maximum air volume flow
100 %
Vmin
-20…100%
Minimum air volume flow
0 %
Vnom
0…60‘000 m
3
/h
Nominal air volume flow
2)
100 m
3
/h
Vn
1.00…3.16
Characteristic value for the air volume flow; set by
the manufacturer (OEM)
1.00
Altitude
0…5000m
in 500m steps
Altitude level correction factor for differential
pressure sensor (select n*500m value closest to
real altitude)
500 meters
1)
Adaptation must not be activated while a device jam is present
2)
Value used for displaying / not used for volume flow control loop
VAV Compact Controllers operate in VAV mode when connected to the specified
power supply. The setpoint signal determines the operating range
min
V

…
max
V

.
1 Setpoint
2 Actual value
3 Control range
The VAV Compact Controllers can be operated in CAV mode by setting the
supervisory controller to send a constant setpoint.
VAV Compact Controllers can also be operated as damper actuators, i.e. the
0...100% setpoint is interpreted as position setpoint.
Vmax [%]Vmin [%]
3
Parameterization
Variable air volume
control (VAV)
Constant air volume
control (CAV)
Position control