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
.
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:
<
.
0.0 Hz
-599.0…599.0 Hz 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
Value defined by parameter
0
DI1
Digital input DI1. 0 = parameter
value.
1
All parameters
No.
Name/Value
Description
Def/FbEq
0
f
value is < 0
value is > 0
f
0
-(
)
-(
)
t
t
Allowed
frequency range
Allowed
frequency range
Allowed
frequency range
Summary of Contents for ACS355 series
Page 1: ...ABB machinery drives User s manual ACS355 drives ...
Page 4: ......
Page 16: ...16 ...
Page 32: ...32 Operation principle and hardware description ...
Page 58: ...58 Electrical installation ...
Page 74: ...74 Start up control with I O and ID run ...
Page 106: ...106 Control panels ...
Page 120: ...120 Application macros ...
Page 178: ...178 Program features ...
Page 338: ...338 Fieldbus control with embedded fieldbus ...
Page 368: ...368 Fault tracing ...
Page 404: ...404 Dimension drawings ...
Page 410: ...410 Appendix Resistor braking ...
Page 434: ...434 Appendix Permanent magnet synchronous motors PMSMs ...