YASKAWA F7 Programming Manual page 18

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.
DC Injection Brake Time
Run Command
100 %
Output Frequency
0 %
IMPORTANT
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 (value of C1-02) expires, the Drive will not run and the Run command will need to be
cycled before operation can occur. The time T (value of C1-02) is determined by the output frequency when the Run command
is removed and the active deceleration time.
Run Command
100 %
Drive Output
Voltage
Output Frequency
Interrupted
0 %
(b2 - 04) × 10 × Output
=
Maximum Frequency
Drive Output Voltage Interrupted
Minimum Baseblock
Time (L2-03)
Fig. 6 DC Injection Braking to Stop
If an overcurrent (OC) fault occurs during DCInj to Stop, lengthen the Minimum Baseblock Time (L2-03)
until the fault no longer occurs.
Ignored
Run Command
Timer Value T
Timer Value T
(C1-02) (C1-02)
Fig. 7 Coast to Stop with Timer
Frequency
(E1 - 04)
ON
(CLOSED)
OFF
(OPEN)
DC Injection Brake
DC Injection Brake Time
b2-04
ON
(CLOSED)
OFF
(OPEN)
Programming 10
b2-04 x 10
b2-04
10%
Deceleration
Time (C1-02)
Minimum
Baseblock
Time (L2-03)
Minimum
Output
Frequency
Output Frequency at Stop Command Input
100% (Maximum
Output Frequency)
100% (Maximum
Output
Frequency)