YASKAWA E7U Programming Manual page 14

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 (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).
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)
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 8
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)