Deceleration To Stop; Coast To Stop - YASKAWA F7 User Manual

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When the output frequency has dropped below the DC Injection Start Frequency (b2-01) or the minimum output frequency
(E1-09) (whichever is greater), deceleration will stop and DC current will be injected into the motor at the current level set in
b2-02 for the time set in b2-04.
Run Command
Output Frequency
The actual deceleration time can be determined by the following formula:
IMPORTANT

1: Coast to stop:

When the run command is removed, the Drive will turn off its output transistors. The friction of the driven
equipment will eventually overcome any residual inertia of the system and the motor will stop.
Run Command
Output Frequency
IMPORTANT
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100 %
Deceleration Time (C1-02)
0 %
Fig 5.3 Deceleration to Stop
Output frequency
=
Time to stop
Maximum
If S-Curve characteristics are set in the Drive programming, they will add to the total time to stop.
100 %
0 %
After a stop is initiated, subsequent run commands will be ignored until the Minimum Baseblock Time
(L2-03) has expired.
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at time of stop command
−
frequency (E1 04)
Fig 5.4 Coast to Stop
Basic Programming 5 - 6
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ON
OFF
DC Injection Start
Frequency (b2-01)
DC Injection Brake Time
when Stopping (b2-04)
DC Injection Braking
x Active decelerati on time
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ON
OFF