ABB ACS560 - Page 256

256 Parameters
30.24 Maximum torque 2 Defines the maximum torque limit for the drive (in percent of
nominal motor torque) when
The limit is effective when
• the source selected by 30.18 Torq li m se l is 1, or
• 30.18 is set to Torque limit set 2
and
• 30.22 Max torque 2 source is set to Maximum torque 2.
See diagram at 30.18 To rq li m se l.
300.0%
0.0…1600.0% Maximum torque limit 2. See par.
46.03
30.26 Power motoring
limit
Defines the maximum allowed power fed by the inverter to the
motor in percent of nominal motor power.
300.00%
0.00…600.00% Maximum motoring power. 1 = 1%
30.27 Power generating
limit
Defines the maximum allowed power fed by the motor to the
inverter in percent of nominal motor power.
Note: If your application, like a pump or a fan, requires that
the motor must rotate in one direction only, use speed/
frequency limit (30.11 Minimum speed/30.13 Minimum
frequency), or direction limit (20.21 Direction) to achieve this.
Do not set parameter 30.19 Minimum torque 1 or 30.27
Power generating limit to 0%, as the drive is then not able to
stop correctly.
-300.00%
-600.00…0.00% Maximum generating power. 1 = 1%
30.30 Overvoltage control Enables the overvoltage control of the intermediate DC link.
Fast braking of a high inertia load causes the voltage to rise
to the overvoltage control limit. To prevent the DC voltage
from exceeding the limit, the overvoltage controller
automatically decreases the braking torque.
Note: If the drive is equipped with a brake chopper and
resistor, or a regenerative supply unit, the controller must be
disabled.
Enable
Disable Overvoltage control disabled. 0
Enable Overvoltage control enabled. 1
30.31 Undervoltage
control
Enables the undervoltage control of the intermediate DC link.
If the DC voltage drops due to input power cut off, the
undervoltage controller will automatically decrease the motor
torque in order to keep the voltage above the lower limit. By
decreasing the motor torque, the inertia of the load will cause
regeneration back to the drive, keeping the DC link charged
and preventing an undervoltage trip until the motor coasts to
a stop. This will act as a power-loss ride-through functionality
in systems with high inertia, such as a centrifuge or a fan.
Enable
Disable Undervoltage control disabled. 0
Enable Undervoltage control enabled. 1
30.35 Thermal current
limitation
Enables/disables temperature-based output current limitation.
The limitation should only be disabled if required by the
application.
Enable
Disable Thermal current limitation disabled. 0
Enable Thermal current limitation enabled. 1
No. Name/Value Description Def/FbEq16