12.2 b: APPLICATION
518 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
The drive ramps the motor to stop as specified by the deceleration time. The default setting for the deceleration
time is C1-02 [Decel Time 1]. The actual deceleration time changes as the load conditions change (for example,
mechanical loss and inertia).
If the output frequency is less than or equal to the value set in b2-01 [ZSpd/DCI Threshold] during deceleration,
the drive will do DC Injection Braking, Zero Speed Control, or Short Circuit Braking, as specified by the control
method.
• Ramp to Stop with V/f, AOLV, CL-V/f, and OLV Control Methods
Parameter b2-01 sets the frequency to start DC Injection Braking at stop. If the output frequency is less than or
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 [DCInj Time@Stop].
Figure 12.3 Ramp to Stop with V/f, AOLV, CL-V/f, and OLV Control Methods
Note:
When b2-01 ≤ E1-09 [Min Output Frequency], the drive will start DC Injection Braking from the frequency set in E1-09.
• Ramp to Stop with CLV/PM, AOLV/PM, and EZOLV Control Methods
Parameter b2-01 sets the frequency to start Short Circuit Braking. When the output frequency is less than or
equal to the value set in b2-01 during deceleration, then the drive will do Short Circuit Braking for the time set
in b2-13 [SCB Time@Stop]. When b2-04 ≠ 0, the drive will do DC Injection Braking for the time set in b2-04
when Short Circuit Braking is complete.
Figure 12.4 Ramp to Stop with CLV/PM, AOLV/PM, and EZOLV Control Methods
Note:
When b2-01 ≤ E1-09, the drive will start Short Circuit Braking from the frequency set in E1-09.
If b2-01 = 0 Hz and E1-09 = 0 Hz, the drive will not do Short Circuit Braking.
• Ramp to Stop in CLV and CLV/PM Control Methods
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.
Figure 12.5 Ramp to Stop in CLV and CLV/PM Control Methods
Note:
When if b2-01 ≤ E1-09, the drive will start Zero Speed Control from the frequency set in E1-09.
1 : Coast->Stop
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