Dc Injection To Stop; Dc Injection Braking To Stop; Coast To Stop With Timer - YASKAWA F7 User Manual

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2: DC Injection to Stop: When the run command is removed, the Drive will Baseblock (turn off all output transistors) for the
ON
Run Command
OFF
100 %
Output Frequency
0 %
IMPORTANT
3: Coast to Stop with Timer: When the run command is removed, the Drive will turn off its output transistors and the motor
Run Command
100 %
Output Frequency
0 %
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Minimum Baseblock Time (L2-03). Once the Minimum Baseblock Time has expired, the Drive will
inject DC current into the motor windings to try and 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.
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
Minimum Baseblock
Time (L2-03)
Fig 5.5 DC Injection Braking to Stop
If an overcurrent (OC) fault occurs during DC Injection Braking to Stop, lengthen the Minimum Baseblock
Time (L2-03) until the fault no longer occurs.
will coast to a stop. If a run command is input before the timer expires, the Drive will not run and
the run command will be ignored. The timer value is determined by the active deceleration time
and the output frequency when the run command is removed.
Timer Value
Fig 5.6 Coast to Stop with Timer
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× ×
(b2 - 04) 10
=
Time
Maximum Frequency
DC Injection Braking
DC Injection Braking Time
Basic Programming 5 - 7
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Output Frequency
(E1 - 04)
b2-04 x 10
DC Injection
Brake Time
b2-04
10%
Output Frequency at Stop Command Input
ON
Deceleration
OFF Time
Timer Value
Minimum
Baseblock
Time (L2-03)
Minimum
Output
Frequency
Output Frequency at Stop Command Input
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100% (Maximum
Output Frequency)
100% (Maximum
Output Frequency)