ABB ACQ580, Firmware Manual

Page: 181 / 422

Parameters 177
30.30 Overvoltage control 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.
Enable
Disable Overvoltage control disabled. 0
Enable Overvoltage control enabled. 1
30.31 Undervoltage
control 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. Enable
Disable Undervoltage control disabled. 0
Enable Undervoltage control enabled. 1
31
31 Fault functions
Configuration of external events; selection of behavior of the
drive upon fault situations.
31.01 External event 1
source Defines the source of external event 1.
See also parameter
31.02 External event 1 type .
0 = Trigger event
1 = Normal operation
Inactive
(true)
Active (false) 0. 0
Inactive (true) 1. 1
Reserved 2
DI1 Digital input DI1 ( 10.02 DI delayed status , bit 0). 3
DI2 Digital input DI2 ( 10.02 DI delayed status , bit 1). 4
DI3 Digital input DI3 ( 10.02 DI delayed status , bit 2). 5
DI4 Digital input DI4 ( 10.02 DI delayed status , bit 3). 6
DI5 Digital input DI5 ( 10.02 DI delayed status , bit 4). 7
DI6 Digital input DI6 ( 10.02 DI delayed status , bit 5). 8
Other [bit] Source selection (see Terms and abbreviations on page 100 ). -
31.02 External event 1
type Selects the type of external event 1. Fault
Fault The external event generates a fault. 0
Warning The external event generates a warning. 1
31.03 External event 2
source Defines the source of external event 2. See also parameter
31.04 External event 2 type .
For the selections, see parameter 31.01 External event 1
source .
Inactive
(true)
31.04 External event 2
type Selects the type of external event 2. Fault
Fault The external event generates a fault. 0
No. Name/Value Description Def/FbEq16