ABB ACS850-04 series, Firmware Manual

Page: 61 / 296

Program features 61
The intermediate DC circuit is charged over an internal resistor which is bypassed
when the correct level (80% of
U
DC
) is reached and voltage is stabilized.
Settings
Parameter group 47 Voltage ctrl (page 212 ).
„
Brake chopper
The built-in brake chopper of the drive can be used to handle the energy generated
by a decelerating motor.
When the brake chopper is enabled and a resistor connected, the chopper will start
conducting when the DC link voltage of the drive reaches 780 V. The maximum
braking power is achieved at 840 V.
Settings
Parameter group 48 Brake chopper (page 212 ).
Drive-to-drive link
The drive-to-drive link is a daisy-chained RS-485 transmission line that allows basic
master/follower communication with one master drive and multiple followers.
The wiring of the drive-to-drive link is presented in the hardware manual of the drive.
Settings
Parameter group 57 D2D communication (page 218 ).
01.07 Dc-voltage
Undervoltage control level (0.7 × U
DC
)
Undervoltage trip level (0.65 × U
DC
)
Overvoltage control level
Overvoltage trip level (1.63 × U
DC
)
50 V min
U
DC
(1.35 × 01.19 Used supply volt )
70 V