YASKAWA GA800 Technical Reference page 720

12.3 b: Application
Parameter b2-01 sets the frequency to start Zero Speed Control at stop. When the output frequency is less than or
equal to the value set in b2-01 during deceleration, the drive will do Zero Speed Control for the time set in b2-04.
Note:
When b2-01 ≤ E1-09, the drive will start Zero Speed Control from the frequency set in E1-09.
1 : Coast to Stop
When you enter the Stop command or turn OFF the Run command, the drive turns OFF the output and coasts the
motor to stop.
Load conditions will have an effect on the deceleration rate as the motor coasts to stop (for example, mechanical loss
and inertia).
Note:
When you enter the Stop command or turn OFF the Run command, the drive ignores the Run command for the time set in L2-03 [Minimum
Baseblock Time]. 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
When you enter the Stop command or turn OFF or Run command, the drive turns OFF the output for the time set in
L2-03. The drive waits for the minimum baseblock time and then injects the amount of DC current into the motor set
in b2-02 [DC Injection Braking Current] to stop the motor with DC current.
DC Injection Braking stops the motor more quickly than coast to stop.
Note:
If A1-02 = 3, 4, 5, 6, or 7, DC Injection Braking to Stop is not available.
720
Figure 12.12 Ramp to Stop in CLV and CLV/PM Control Methods
Figure 12.13 Coast to Stop
YASKAWA SIEPC71061737D GA800 Drive Technical Reference