ABB ACS355 series User Manual page 223

All parameters
No. Name/Value
2006 UNDERVOLT
CTRL
DISABLE
ENABLE(TIME) Undervoltage control activated. After being in undervoltage
ENABLE
2007 MINIMUM
FREQ
-599.0...599.0 Hz Minimum frequency
2008 MAXIMUM
FREQ
0.0...599.0 Hz
2013 MIN TORQUE
SEL
MIN TORQUE
1
DI1
Description
Activates or deactivates 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 speed in order to keep the voltage above the lower
limit. By decreasing the motor speed, the inertia of the load
will cause regeneration back into the drive, keeping the DC
link charged and preventing an undervoltage trip until the
motor coasts to stop. This will act as a power-loss ride-
through functionality in systems with a high inertia, such as
a centrifuge or a fan. See section
page 137.
Undervoltage control deactivated
control for 500 ms the drive faults and stops using an
emergency ramp.
Undervoltage control activated. No operation time limit.
Defines the minimum limit for the drive output frequency.
A positive (or zero) minimum frequency value defines two
ranges, one positive and one negative.
A negative minimum frequency value defines one speed
range.
Note: MINIMUM FREQ
f
value is < 0
2008
2008
Allowed
frequency range
0
2007
Defines the maximum limit for the drive output frequency.
Maximum frequency
Selects the minimum torque limit for the drive.
Value defined by parameter
Digital input DI1. 0 = parameter
value. 1 = parameter
Actual signals and parameters 223
Motor identification
< MAXIMUM FREQ.
f
2007
2008
Allowed
frequency range
2007
t
0
-(2007)
Allowed
frequency range
-(2008)
2015 MIN TORQUE 1
2015 MIN TORQUE 1
2016 MIN TORQUE 2
Def/FbEq
ENABLE(
TIME)
on
0
1
2
0.0 Hz
value is > 0
t
1 = 0.1 Hz
E: 50.0 Hz
U: 60.0 Hz
1 = 0.1 Hz
MIN
TORQUE
1
0
1
value.