RX Quick Start Guide 21
PROGRAMMING RX
This table shows the different acceleration shapes
3.9 DC braking
The DC braking feature can provide additional stopping torque during deceleration or before acceleration and is particularly
useful at low speeds when normal deceleration torque is minimal. This function injects a DC voltage into the motor windings
which generates a DC current that force the motor to stop.
There are several modes available depending on the application requirements:
• Normal DC braking is used when A051 is set to “01” (Enable during stop) and the RUN command (FW/RV) is turned OFF,
at the moment that deceleration stops the DC brake starts with a settable power (A054) and duration (A055). Additionally is
possible to specify a wait time between the end of the ramp and the DC braking on parameter A053, during which the motor
will free run. If free-run is selected as stopping method the DC braking will start just when the Run commands turns OFF.
Setting 00 01 02 03 04
Curve Line S-curve U-curve Inverse U-curve EL S-curve
A097
(Accel. pattern)
A098
(Decel. pattern)
t
Freq.
t
Freq.
t
Freq.
t
Freq.
t
Freq.
Output frequency
Time
Output frequency
Time
Output frequency
Time
Output frequency
Time
Output frequency
Time
ON
F-SET
DB
DC Brake at stop
F-OUT
FW
A053 A055
A053
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