YASKAWA GA700 Technical Manual page 596

11.3 b: Application
Note:
The drive will begin Zero Speed Control from the frequency set in E1-09 [Minimum Output Frequency] if b2-01 ≤ E1-09.
1 : Coast to Stop
The drive shuts OFF its output when the Stop command is entered (or when the Run command is switched OFF).
Motor coasts to stop.
Load conditions such as mechanical loss and inertia determine the deceleration rate as the motor coasts to stop.
Note:
The drive disregards the Run command for the time set in L2-03 [Momentary Power Loss Min BB Time] when the Stop command is
entered (or when the Run command is switched OFF). Do not enter the Run command until the motor comes to a complete stop. Use
DC Injection or Speed Search to restart the motor before it stops.
2 : DC Injection Braking to Stop
The drive shuts off its output for the time set in L2-03 when the Stop command is entered (or when the Run
command is switched OFF). Once the minimum baseblock time has passed, the drive then injects the amount of
DC current into the motor that is set in b2-02 [DC Injection Braking Current], stopping the motor with DC
current.
DC Injection Braking stops the motor more quickly than coasting to stop.
Note:
DC Injection Braking to Stop is not available if A1-02 = 3, 4, 5, 6, or 7.
The value set in b2-04 and the output frequency when the Stop command is entered determine the DC Injection
Braking time. The drive calculates the DC Injection Braking time as follows.
596
Figure 11.12 Ramping to Stop in CLVor CLV/PM
Figure 11.13 Coast to Stop
Figure 11.14 DC Injection Braking to Stop
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual