Actual signals and parameters 223
2006 UNDERVOLT
CTRL
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 Motor identification on
page 137.
ENABLE(
TIME)
DISABLE Undervoltage control deactivated 0
ENABLE(TIME) Undervoltage control activated. After being in undervoltage
control for 500 ms the drive faults and stops using an
emergency ramp.
1
ENABLE Undervoltage control activated. No operation time limit. 2
2007 MINIMUM
FREQ
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 <
MAXIMUM FREQ.
0.0 Hz
-599.0…599.0Hz Minimum frequency 1 = 0.1 Hz
2008 MAXIMUM
FREQ
Defines the maximum limit for the drive output frequency. E: 50.0 Hz
U: 60.0 Hz
0.0…599.0 Hz Maximum frequency 1 = 0.1 Hz
2013 MIN TORQUE
SEL
Selects the minimum torque limit for the drive. MIN
TORQUE
1
MIN TORQUE
1
Value defined by parameter 2015 MIN TORQUE 1 0
DI1 Digital input DI1. 0 = parameter 2015 MIN TORQUE 1
value. 1 = parameter 2016 MIN TORQUE 2 value.
1
All parameters
No. Name/Value Description Def/FbEq
2008
2007
0
f
2008
value is < 0
2007 value is > 0
f
2008
2007
0
-(2007)
-(2008)
t
t
Allowed
frequency range
Allowed
frequency range
Allowed
frequency range
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