BENSHAW RSi GM2 Series, Instruction Manual

Page: 93 / 282

Learning Basic Features
83
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890054-00-00
GM2 Series VFD
DC Braking After Stop
DC Braking can be applied to the motor during deceleration. The inverter stops the motor by
supplying DC power to the motor. Settings include a delay time, a brake time, a brake current level
and a brake frequency. During deceleration, when the inverter output frequency reaches the DC
braking frequency, the inverter supplies DC voltage to the motor and stops it.
Group Code Name Setting Setting Range Unit
Ad
08 Stop Mode 0 Dec 0 – 4 -
14 Output block time
before braking
0.10 0.00 – 60.00 sec
15 DC braking time 1.00 0 – 60 sec
16 DC braking rate 50
0-Rated Current of
Inverter/Rated Current
of Motor x 100%
%
17 DC braking
frequency
5.00 0.00 – 60.00 Hz
DC Braking After Stop Setting Details
Code and
Features
Description
Ad.14
Dc-Block Time
Set a delay time after the inverter output turns off and before
applying DC braking. If the inertia of the load is high, or if DC
braking frequency (Ad.17) is set too high, a fault may occur due to
overcurrent conditions when the inverter applies DC voltage to the
motor. To prevent overcurrent faults, adjust the delay time before
DC braking.
Ad.15
Dc-Brake Time
Set the time duration of the DC voltage applied to the motor.
Ad.16
Dc-Brake Level
Set the amount of DC braking to apply. The parameter setting is
based on the rated current of the motor. The maximum value of the
DC braking current is limited to the inverter rated current.
Maximum Dc-Brake Level = Rated Current of Inverter/Rated Current
of Motor x 100%
Ad.17
Dc-Brake Freq
Set the DC Brake frequency to start DC braking. When the inverter
output frequency is reached, the inverter starts DC Braking. If the
dwell frequency is set lower than the DC braking frequency, dwell
operation will not work and DC braking will start instead.
Note that the motor can overheat or be damaged if an excessive
amount of DC Braking is applied or the DC Brake time is too long.