
Parameters 269
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.
Disable
Overvoltage control disabled.
0
Enable
Overvoltage control enabled.
1
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.
Disable
Undervoltage control disabled.
0
Enable
Undervoltage control enabled.
1
Enables/disables temperature-based output current limitation.
The limitation should only be disabled if required by the
application.
Disable
Thermal current limitation disabled.
0
Enable
Thermal current limitation enabled.
1
(Only visible when IGBT supply unit control activated by
)
Displays limit word 1 of the supply unit.
This parameter is read-only.
-
0000h…FFFFh
Supply unit limit word 1.
1 = 1
No.
Name/Value
Description
Def
/
FbEq16
Bit
Name
Description
0
P user ref max
1 = Power reference is being limited by supply control program
parameters
1
P user ref min
2
P user max
1 = Power is being limited by parameter
3
P user min
1 = Power is being limited by parameter
4
P cooling
overtemp
1 = Power reference is being limited because of coolant
overtemperature
5
P power unit
overtemp
1 = Power reference is being limited because of supply unit
overtemperature
6…15
Reserved
Summary of Contents for ACS880-x04
Page 1: ... ABB INDUSTRIAL DRIVES ACS880 primary control program Firmware manual ...
Page 4: ......
Page 18: ...18 Using the control panel ...
Page 24: ...24 Control locations and operating modes ...
Page 112: ...112 Application macros ...
Page 496: ...496 Additional parameter data ...
Page 544: ...544 Fault tracing ...
Page 602: ...602 Control chain diagrams ...