YASKAWA P7, User Manual, Page: 91 / 256

Programming 5 - 7
2:DCInj to Stop: When the Run command is removed, the Drive will Baseblock (turn off its output) for the Minimum
Baseblock Time (L2-03). Once the Minimum Baseblock Time has expired, the Drive will inject DC current into the motor
windings to lock the motor shaft. The stopping time will be reduced as compared to Coast to Stop. The level of DC
Injection current is set by parameter b2-02 (50% Default). The DC Injection brake time is determined by the set value in
b2-04 and the output frequency at the time the Run command is removed.
Fig. 6 DC Injection Braking to Stop
3:Coast w/Timer: When the Run command is removed, the Drive will turn off its output and the motor will coast to a stop.
If a Run command is input before time T (operation wait time) expires, the Drive will not run and the Run command will
need to be cycled before operation can occur
.
The time T (operation wait time) is determined by the output frequency when
the Run command is removed and the active deceleration time (C1-02).
Fig. 7 Coast to Stop with Timer
IMPORTANT
After a stop is initiated, a subsequent Run commands input before the Minimum Baseblock Time (L2-03)
has expired, will be ignored.
IMPORTANT
If an overcurrent (OC) fault occurs during DCInj to Stop, lengthen the Minimum Baseblock Time (L2-03)
until the fault no longer occurs.
04) - (E1 Frequency Maximum
Frequency Output 10 04) - (b2
Time Brake Injection DC
× ×
=
ON
OFF
Run Command
Output Frequency Drive Output Voltage Interrupted
DC Injection Brake
DC Injection Brake Time
Minimum Baseblock
Time (L2-03)
100 %
0 %
D
C
In
je
ct
io
n
Br
a
k
e
T
im
e
b2-04 x 10
b2-04
10%
100% (Maximum
Output Frequency)
b2-04
(CLOSED)
(OPEN)
Run Command
Output Frequency
Drive Output
Voltage
Interrupted
OFF
ON
Timer Value T
(C1-02)
100 %
0 %
Op
er
ati
o
n
Wai
t T
im
e
(T
)
Deceleration
Time (C1-02)
Minimum
Baseblock
Time (L2-03)
Minimum
Output
Frequency
100% (Maximum
Output
Frequency)
Output Frequency at Stop Command Input
Ignored
Run Command
Timer Value T
(OPEN)
(CLOSED)