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6
-22
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 out-
put is interrupted to coast the motor to a stop. After the Stop Command is input, Run Commands are ignored
until the time T has elapsed. The time T depends upon the output frequency when the Stop Command is input
and the deceleration time.
Fig 6.19 Coast to Stop with Timer
Using the DC Injection Brake
Set constant b2-03 to apply the DC injection braking current to the motor while it is coasting to a stop, to stop
the motor and then restart it.
Set b2-03 to 0 to disable the DC injection brake at start.
Set the DC injection brake current using b2-02.
Related Constants
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
V/f
V/f
with
PG
Open
Loop
Vec-
tor
Flux
Vec-
tor
b2-02
DC injection
braking cur-
rent
Sets the DC injection braking
current as a percentage of the
Inverter rated current.
The DC injection braking cur-
rent in flux control is affected by
any change to the setting of E2-
03.
0 to
100
50%
No
A
A
A
No
18AH
b2-03
DC injection
braking time
at start
Used to set the time to perform
DC injection braking at start in
units of 1 second.
Used to stop coasting motor and
restart it. When the set value is
0, DC injection braking at start
is not performed.
0.00
to
10.00
0.00 s
No
A
A
A
A
18BH
Output
frequency
Run Command
ON
ON
ON
OFF
OFF
Inverter output voltage interrupted
Operation wait time T
100% (Maximum output frequency)
Minimum output frequency
Output frequency at
Stop Command input
Operation wait time T
Deceleration time
(e.g., C1-02)
Minimum baseblock
time (L2-03)
DC injection braking is used at startup for flux vector control
with the current set in E2-03 (Motor no-load current).