Fig. 21: The Load drooping function
A. Load Drooping Time (ID 656)
B. Output Frequency
C. Torque
P3.1.2.8 LOAD DROOPING TIME (ID 656)
Use this parameter to set the drooping time of the motor.
Use load drooping to get a dynamic speed drooping when the load changes. This parameter
gives the time during which the speed is restored 63% of the change.
P3.1.2.9 LOAD DROOPING MODE (ID 1534)
Use this parameter to set the load drooping mode.
Selection
number
Selection name Description
0 Normal
The load drooping factor is constant through the frequency
range.
1 Linear removal
The load drooping is removed linearly from the nominal fre-
quency to zero frequency.
P3.1.2.10 OVERVOLTAGE CONTROL (ID 607)
Use this parameter to set the overvoltage controller out of operation.
The function is necessary when
•
the supply voltage changes, for example, between -15% and +10%, and
•
the process you control does not have the tolerance for the changes that the
undervoltage controller and the overvoltage controller make to the output frequency of
the drive.
The overvoltage controller increases the output frequency of the drive
PARAMETER DESCRIPTIONS VACON · 201
LOCAL CONTACTS: HTTP://DRIVES.DANFOSS.COM/DANFOSS-DRIVES/LOCAL-CONTACTS/
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