YASKAWA H6B1A002, Technical Reference

Page: 190 / 794

5.2 b: Application
190 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Load conditions will have an effect on the deceleration rate as the motor coasts to stop (for example, mechanical loss
and inertia).
Figure 5.4 Coast to Stop
Note:
The drive ignores the Run command for the time set in L2-03 [Minimum Baseblock Time] when you enter a Stop command or switch OFF
the Run command. Make sure that the motor stops completely before you enter a Run command. 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 the 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.
b2-02: DC Injection Braking Current
b2-04: DC Inject Braking Time at Stop L2-03: Minimum Baseblock Time
Figure 5.5 DC Injection Braking to Stop
The value set in b2-04 and the output frequency when the drive receives the Stop command determine the DC
Injection Braking time. The drive calculates the DC Injection Braking time as in Figure 5.6 .