YASKAWA GA700 Technical Manual page 595

Select the appropriate stopping method for the application from the following four options.
0 : Ramp to Stop
The drive decelerates the motor to stop when the Stop command is entered (or when the Run command is
switched OFF).
The drive ramps the motor to stop according to the deceleration time. The default setting for the deceleration time
is C1-02 [Deceleration Time 1]. The actual deceleration time will vary depending on load conditions, such as
mechanical loss and inertia.
If the output frequency falls below or is equal to the value set in b2-01 [DC Injection/Zero Speed Threshold]
during deceleration, then the drive will perform DC Injection Braking, Zero Speed Control, or Short Circuit
Braking, depending on the control mode.
• Ramp to stop with V/f control, Advanced Open Loop Vector Control, Closed Loop V/f Control, Open
Loop Vector Control Mode
Parameter b2-01 sets the frequency to begin DC Injection Braking at stop. If the output frequency falls below or
is equal to the value set in b2-01 during deceleration, then the drive will perform DC Injection Braking for the
time set in b2-04 [DC Inject Braking Time at Stop].
Note:
The drive will begin DC Injection Braking from the frequency set in E1-09 [Minimum Output Frequency] if b2-01 ≤ E1-09.
• Ramp to stop with Closed Loop Vector Control for PM, Advanced Open Loop Vector Control for PM,
and EZ Open Loop Vector Control Mode
Parameter b2-01 sets the frequency to begin Short Circuit Braking. If the output frequency falls below or is
equal to the value set in b2-01 during deceleration, then the drive will perform Short Circuit Braking for the
time set in b2-13 [Short Circuit Brake Time @ Start]. If b2-04 ≠ 0, then the drive will perform DC Injection
Braking for the time set in b2-04 once Short Circuit Braking is complete.
Figure 11.11 Ramp to Stop with Open Loop Vector Control for PM, Advanced Open Loop Vector Control for PM, and EZ
Note:
The drive will begin Short Circuit Braking from the frequency set in E1-09 [Minimum Output Frequency] if b2-01 ≤ E1-09.
The drive will not perform Short Circuit Braking if b2-01 = 0 Hz and E1-09 = 0 Hz.
• Ramping to Stop in Closed Loop Vector Control or Closed Loop Vector Control for PM
Parameter b2-01 sets the frequency to begin Zero Speed Control at stop. If the output frequency falls below or is
equal to the value set in b2-01 during deceleration, then the drive will perform Zero Speed Control for the time
set in b2-04.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Figure 11.10 Ramping to Stop in V/f, CL-V/f, or OLV
Open Loop Vector Control Mode
11.3 b: Application
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