ASV115
www.sauter-controls.com
5/13
25
.
6
%
40
0
.
2
0
.
10
%
40
%
80
2
3
*
25
.
0
[%]
1
1
2
1
2
1
*
[%]
%
%
%
.
.
V
V
V
V
shift
P
P
P
P
P
P
c
F
shift
U
U
U
ad
p
qV
S
%
10V
100%
V
cqV.s
0
0
Vnom
- V
+ V
Vmin
Vmax
B
11
695
80%
-40%
U(AI02)
0
V
2
10
P1
P2
ZP
B
11
696
10V
=
0
r - c
rqV
rqV
rqV
> cqV.s
cqV.s
cqV.s
<
5
-eqV.s
B
1
1697
Conversion of r
qV
For range
0…10 V
For range
2…10 V
Note
Output parameters on outputs AO02 and AO03:
The default parameters limit the output voltage for actual value r
qv
to 10 V. So that r
qv
values of up to 12 V can be issued, the follow-
ing values must be set in
free
configurable
mode:
Start:
0.0% (0.00 V)
End: 120.0%
(12.00
V)
Air volume shift
(AI02)
Where a difference between two air volumes is desirable, e.g.
between supply and exhaust air, a parallel air volume shift by a
defined value
should be chosen. Since the command signal c
qV.s
is always related to the nominal air volume
nom
it is appropriate to
set
nom
to the value of
max
. This ensures that
max
is always
100% of the air volume. If
max
is identical to the exhaust air, both
as a percentage and as an amount of the supply air, optimal syn-
chronicity of the air volumes is achieved.
Functional diagram for
The following parameters can be set using SAUTER CASE VAV:
Shift
factor
The setpoint shift factor is the amplification factor to define the shift
influence. In normal cases, it should be selected so that the shift
influence is
20%
nom
. Recommended value: a factor of 0.1
2%
/Volt (with a factory setting of AI02). The following also ap-
plies:
Value = 0: shift is inactive
Value
0: shift is active
Shift
limitation
The limitation is defined as a percentage of the air volume. The
highest and lowest permitted values may be entered here.
With a parallel shift of the air volume value, the set
min
and
max
values can be overridden. Downward limitation of the air volume is
implemented by seepage suppression, and upward limitation is
defined by the maximum possible plant air volume (damper fully
open). As an example, the calculation and setting of the parallel
setpoint shift may be performed as follows:
In order to obtain the value for the resultant setpoint shift as a per-
centage of the air volume, the configuration of connection AI02
must also be taken into account. For example, if the input was
freely configured and a start value of 2 V (P1
v
) corresponding to -
40% (P1
%
) was chosen with an end value of 10 V (P2
v
) correspond-
ing to 80% (P2
%
) and, in addition, a shift factor F
s
of 0.25 is se-
lected, a voltage of 3 V (c
qV.p.ad
) present at connection AI02 causes
the following percentage shift in the setpoint.
Conversion the setpoint shift
Functional diagram
Control deviation –e (AO02)
Output AO02 may be used for alarm purposes if the air volume
deviates from command variable c
qV.s
. The current control deviation
in volts can be measured here. If the setpoint equals the actual
value, the output has a value of 5 V. If the actual value is below the
setpoint, the output is set to less than 5 V, depending on the devia-
tion. If the actual value is higher than the setpoint, a value greater
than 5 V is shown at the output.
Functional diagram
The output is parameterised by default in CASE VAV for a freely
configurable characteristic with the following values.
Start value:
0 V (-50%
End value:
10 V (+50%)
Note
Half slope (-100%...100%, 0.05V/% as opposed to 0.1 V/%) re-
sults in a double dead zone (= green range
no alarm) in the
notification.
Digital inputs (DI04 and DI05)
Priority controls should be implemented using the available digital
inputs. It is simple to select individual functions by means of soft-
ware. The digital inputs can be operated with normally closed or
normally open contacts. Mixed use of normally closed and normally
open contacts is also possible. The parameters for these are set
using the SAUTER CASE VAV software. The use of normally open
contacts for priority control is parameterised ex factory.
10
*
nom
qV
V
r
V
8
*
2
nom
qV
V
r
V
