7.19 Ramps
Pump variant Ramps
NBE, NKE, NBSE, VLSE ●
NBE, NKE, NBSE Series
2000; VLSE with
Delta ρ sensor
●
The ramps determine how quickly the product can accelerate and
decelerate during start and stop or setpoint changes.
You can make the following settings:
• acceleration time, 0.1 to 300 s
• deceleration time, 0.1 to 300 s.
The times apply to the acceleration from 0 rpm to a fixed maximum
speed and the deceleration from a fixed maximum speed to 0 rpm,
respectively.
At short deceleration times, the deceleration of the product may
depend on load and inertia as there is no possibility of actively
braking the product.
If the power supply is switched off, the deceleration of the product
only depends on the load and inertia.
TM069798
Pos. Description
Y Speed
X Time
1 Fixed maximum
2 User-set maximum
3 User-set minimum
4 Fixed initial ramp
5 Fixed final ramp
6 Ramp time up
7 Ramp time down
7.20 Skip band
Pump variant Skid band
NBE, NKE, NBSE, VLSE ●
NBE, NKE, NBSE Series
2000; VLSE with
Delta ρ sensor
●
Use this function to select a skip band within the range from user-
set minimum speed to user-set maximum speed if continuous
operation is not required. The upper and lower speeds are stated in
percentage of rated speed.
The purpose of the skip band is to avoid certain speeds which may
cause noise or vibrations. If no skip band is required, select -.
7.21
Standstill heating
Pump variant Standstill heating
NBE, NKE, NBSE, VLSE ●
NBE, NKE, NBSE Series
2000; VLSE with
Delta ρ sensor
●
Use this function to avoid condensation in humid environments.
When you set the function to Active and the product is in operating
mode Stop, a low AC voltage is applied to the motor windings. The
voltage is not high enough to make the motor rotate, but ensures
that sufficient heat is generated to avoid condensation in the
product, including the electronic parts in the drive.
Remember to remove the drain plugs and fit a cover over
the product.
7.22 Alarm handling
Pump variant Alarm handling
NBE, NKE, NBSE, VLSE ●
NBE, NKE, NBSE Series
2000; VLSE with
Delta ρ sensor
●
This setting determines how the pump must react in case of a
sensor failure.
Alarm or warning types:
• Warning
A warning. There is no change in the operating mode.
• Stop
The pump stops.
• Min.
The pump reduces the speed to minimum.
• Max.
The pump increases the speed to maximum.
• User defined speed
The pump runs at the speed set by the user.
Affected inputs:
• Analog input 1
• Analog input 2
• Analog input 3
• Built-in Grundfos sensor
• Pt100/1000 input 1
• Pt100/1000 input 2
• Liqtec input.
7.23
Motor bearing monitoring
Pump variant Motor bearing monitoring
NBE, NKE, NBSE, VLSE ●
NBE, NKE, NBSE Series
2000; VLSE with
Delta ρ sensor
●
Use this function to select whether or not you want to monitor the
motor bearings.
You can make the following settings:
• Active
• Not active
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