Stopping Methods
6-13
îš„Coast to Stop with Timer
If the stop command is input (i.e., the run command is turned OFF) when b1-03 is set to 3, the Inverter output
is switched off so that the motor coasts to stop. After the stop command is input, run commands are ignored
until the time T has elapsed. The time T depends on the output frequency when the stop command is input and
on the deceleration time.
Fig 6.17 Coast to Stop with Timer
îš‹ Using the DC Injection Brake
Set parameter b2-03 to apply DC injection to the motor, before it starts to accelerate. Applying DC injection at
start will stop the motor before starting if it was coasting through inertia or wind mill effect.
Set b2-03 to 0 to disable the DC injection brake at start.
Set parameter b2-04 to apply a DC injection brake to the motor at stopping. It prevents the motor from coast-
ing when it would not be stopped completely using the normal deceleration. This can occur if the inertia is
very high. The DC injection brake can be disabled by setting b2-04 to 0.
Set the DC injection brake current using b2-02.
îš„Related Parameters
Parameter
Number
Name
Setting
Range
Factory
Setting
Change
during
Operation
Access
Level
b2-01 DC injection braking starting frequency
0.0 to
10.0
0.5 Hz No A
b2-02 DC injection braking current
0 to
100
50% No A
b2-03 DC injection braking time at start
0.00
to
10.00
0.00 sec. No A
b2-04 DC injection braking time at stop
0.00 to
10.0
0.50 sec. No A
Run command
Output frequency
Operation wait time T
Minimum output frequency
100% (Maximum output frequency)
Deceleration time
(e.g., C1-02)
Minimum baseblock
time (L2-03)
Output frequency at
stop command input
Inverter output voltage interrupted
Operation wait time T
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