ABB ACS320 series, User Manual

Page: 132 / 442

132 Program features
User load curve
The user can specify a load curve (motor torque as a function of frequency) for
supervision. The curve is defined by five points. Supervision can be set for the torque
dropping below the underload curve, exceeding the overload curve, or both.
A fault is generated if the torque has been out of the allowed area for longer than the
user-defined time limit. An alarm is generated if the torque has been out of the
allowed area for longer than the half of the user-defined time limit.

Settings
1805 Timed function status indicated through digital output DO
4027 Timed PID1 parameter set 1/2 selection
4228 Timed external PID2 activation
Parameter Additional information
Group 37: User load curve User load curve settings
Parameter Additional information
Overload area
Underload area
Allowed operating area
Motor torque (%)
Output
frequency (Hz)
Freq. 2 Freq. 1 Freq. 3 Freq. 4 Freq. 5
Torque
high 1
Torque
high 2
Torque
high 3
Torque
low 1
Torque
low 2
Torque
low 3
Torque
high 4
Torque
low 4
Torque
high 5
Torque
low 5