7.5 Pump control modes
7.5.1 Configuring the pump control mode
1.
Configure the pump control mode via MO,0.
2.
Verify the current pump control mode via MI,0.
3.
Set the duty point via either AV,7, AV,8 or AV,9 depending on
your chosen control mode.
ID
Object name R/W
Description
MO,0
Config Pump
Control Mode
[Enum]
W
This sets the pump control mode:
1: Constant speed
2: Constant pressure
3: Proportional pressure
4: AUTO
ADAPT
5: Constant flow.
MI,0
Status Pump
Control Mode
[Enum]
R
The current pump control mode:
1: Constant speed
2: Constant pressure
3: Proportional pressure
4: AUTO
ADAPT
5: Constant flow.
AV,7
Config Pump
Head Duty
Point [m]
R/W
Desired pressure duty point for
constant or proportional pressure
control modes.
AV,8
Config Pump
Flow Duty
Point [m
3
/h]
R/W
Desired flow duty point for
proportional pressure and flow
control modes.
AV,9
Config Pump
Speed Duty
Point [%]
R/W
Desired speed for constant speed
control mode.
Depending on pump model, the
minimum speed may be larger than
the minimum accepted speed at
data point (larger than 30 %)
7.5.2 Setting the duty point for constant-speed control mode
This duty point is set via AV,9 (speed duty point). The duty point is a
percentage of the maximum speed. In this control mode, the pump
speed will be constant at the configured speed duty point.
5
3
6
1
2
4
TM069265
Constant-speed control curve
Pos.
Description
1
Head [m]
2
H
max.
3
Q
max.
4
Constant speed curves
5
System curve
6
Flow [m
3
/h]
7.5.3 Setting the duty point for constant-pressure control mode
The duty point is set via AV,7 (speed duty point). The duty point is
the pressure in meters. In this control mode, the pump speed will
have a constant pressure at the configured duty point.
6
5
3
4
7
1
2
5
TM069264
Constant-pressure control curve
Pos.
Description
1
Head [m]
2
H
max.
3
AV,7
4
Q
max.
5
System curves
6
Control curve
7
Flow [m
3
/h]
15
English (GB)
