Danfoss VACON 100 FLOW Series Application Manual page 226

VACON® 100 FLOW
Application Guide
Use this parameter to select the response of the drive to an 'Underload' fault. If the underload protection function detects that there
is not a sufficient load on the motor, an underload fault occurs.
11.11.4.2 (ID 714) Underload Protection: Field Weakening Area Load
Location in the menu: P3.9.4.2
Use this parameter to set the minimum torque that the motor needs when the output frequency of the drive is higher than the
frequency of the weakening point. It is possible set the value of this parameter between 10.0% and 150.0% x T
the limit for the minimum torque when the output frequency is above the field weakening point.
Changing parameter P3.1.1.4 (Motor Nominal Current) restores this parameter automatically to its default value. See
load (Dry Pump) Protection.
A
ID714
B
ID715
5 Hz
Illustration 69: Setting of the Minimum Load
A Torque
B Underload area
11.11.4.3 (ID 715) Underload Protection: Zero Frequency Load
Location in the menu: P3.9.4.3
Use this parameter to set the minimum torque that the motor needs when the output frequency of the drive is 0.
Changing the value of parameter P3.1.1.4 restores this parameter automatically to the default value.
11.11.4.4 (ID 716) Underload Protection: Time Limit
Location in the menu: P3.9.4.4
Use this parameter to set the maximum time for an underload state. It is the maximum time for the underload state to be active
before an underload fault occurs.
It is possible to set the time limit between 2.0 s and 600.0 s.
An internal counter counts the underload time. If the value of the counter goes above this limit, the protection causes the drive to
trip. The drive trips as is set in parameter P3.9.4.1 Underload Fault. If the drive stops, the underload counter goes back to 0.
226 | Danfoss A/S © 2023.08
f
C
C Field weakening point
AB298035655957en-000201 / DPD01083
Parameter Descriptions
. This value is
nMotor
11.11.4 Under-