REXROTH Fv Series, Instruction Manual

Page: 98 / 222

1. In case of too fast deceleration a fault may happen, extend
the deceleration time or calculate if additional brake units /
resistors are required.
2. If the output frequency is lower than ’ Shutdown DC brake
activation frequency’ [b1.21], the set ‘DC brake current’
[b1.23] is applied, for ‘Shutdown DC brake time’ [b1.22]. This
mode is suitable for circumstances where regular or quick
deceleration stop is required (with a brake resistor or brake
unit).
● 1: Freewheel to stop
–
Once the stop command is activated, the converter shuts down
output, and the motor freewheels mechanically to stop.
b1.20
Startup DC brake time Factory default 0.0s
Setting range 0.0 − 20.0s Minimum unit 0.1s
● If ‘Start mode’[b1.16] is ‘1: Start mode 2’, apply ‘DC brake current’
[b1.23] for ‘Startup DC brake time’ [b1.20].
● If ‘Startup DC brake time’ [b1.20] is 0, the converter starts directly with‐
out DC brake. The larger the DC brake current, the larger the braking
force is. Take the withstanding capability of the motor into account.
b1.21
Shutdown DC brake activation frequency Factory default 0.00 Hz
Setting range 0.00 − 10.00 Hz Minimum unit 0.01 Hz
b1.22
Shutdown DC brake time Factory default 0.0s
Setting range 0.0 − 20.0s Minimum unit 0.1s
● Used to set the time for applying the DC brake current during the stop
process. If set to 0.0s no DC brake is done, and the converter stops ac‐
cording to ‘Stop mode’ [b1.19] is ‘0: Decelerate to stop’. When digital in‐
put terminal Xi=13, parameter [b1.22] is deactivated.
b1.23
DC brake current Factory default 0.0 %
Setting range
0.0 % − 150.0 %
(of 'Rated converter cur‐
rent')
Minimum unit 0.1 %
● When the frequency converter starts in the DC brake mode or shutdown
DC brake is active, [b1.23] is used to control the braking current and is
set in a percentage of the rated converter current.
Bosch Rexroth AG DOK-RCON02-FV*********IB01-EN-P
Rexroth Frequency Converter Fv
96/219
Parameter Settings