Example: To get to the menu "1-28 Motor Rotation Check", you
must do the following:
1. Navigate to "1-** Load and Motor", and press [OK].
2. Use the [Up] and [Down] buttons to navigate to "1-2* Motor
Data", and press [OK].
3. Use the [Up] and [Down] buttons to navigate to "1-28 Motor
Rotation Check", and press [OK] to select the menu.
8.3 Operating modes
The following operating modes are set on the operating panel using
the [Favourites] menu.
Operating mode Description
Normal
The pump is running in the operating mode
selected.
Stop
The pump has been stopped, and the green
indicator light is flashing.
Min. The pump is running at minimum speed.
Max. The pump is running at maximum speed.
User curve The pump is running at user-defined speed.
Minimum and maximum curves.
The pump speed is kept at a given set value
for minimum and maximum speed.
Example: Maximum curve operation can for instance be used in
connection with venting the pump during installation.
Example: Minimum curve operation can for instance be used in
periods with a very small flow rate requirement.
8.4 Control modes
The control mode is set in the [Favourites] menu.
There are two basic control modes:
• Uncontrolled operation (open loop).
• Controlled operation (closed loop) with a sensor connected or
based on calculated value (sensorless function).
The sensorless function uses calculated head or flow for the pump
control and it is not as accurate as the pump control with a
feedback sensor. This function must be ordered in advance and
calibrated at the factory prior to shipment.
See sections Uncontrolled operation (open loop) and Controlled
operation (closed loop).
Default control mode made in NBE, NKE, NBSE:
• Open loop.
Default control mode made in NBE, NKE, NBSE Series 2000:
• Proportional differential pressure.
Related information
8.4.1 Uncontrolled operation (open loop)
8.4.2 Controlled operation (closed loop)
8.4.1
Uncontrolled operation (open loop)
Constant curve.
The speed is kept at a set value in the
range between the minimum and
maximum curves.
The setpoint is set in % corresponding
to the required speed.
Example: Operation on constant curve can for instance be used for
pumps with no sensor connected.
Example: Typically used in connection with an overall control
system such as MPC or another external controller.
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