ABB +N5600 Firmware Instructions page 300

300 Parameters
No. Name/Value
30.30 Overvoltage control
Disable
Enable
30.31 Undervoltage
control
Disable
Enable
30.101 LSU limit word 1
Bit Name
0 P user ref max
1 P user ref min
2 P user max
3 P user min
4 P cooling
overtemp
5 P power unit
overtemp
6...15 Reserved
0000h...FFFFh
Description
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.
Overvoltage control disabled.
Overvoltage control enabled.
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.
Undervoltage control disabled.
Undervoltage control enabled.
(Only visible when IGBT supply unit control activated by
95.20)
Displays limit word 1 of the supply unit.
This parameter is read-only.
Description
1 = Power reference is being limited by supply control program
parameters
1 = Power is being limited by parameter
1 = Power is being limited by parameter
1 = Power reference is being limited because of coolant
overtemperature
1 = Power reference is being limited because of supply unit
overtemperature
Supply unit limit word 1.
Def/FbEq16
Disable
0
1
Enable
0
1
-
30.149
30.148
1 = 1