Parameter Details
12
12.3 b: Application
YASKAWA SIEPC71061753C GA500 Technical Manual 505
• Ramp to Stop with V/f Control 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 [DC Inject Braking Time at Stop].
Figure 12.9 Ramp to Stop with V/f and OLV Control Methods
Note:
When b2-01 ≤ E1-09 [Minimum Output Frequency], the drive will start DC Injection Braking from the frequency set in E1-09.
• Ramp to Stop with OLV/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 [Short Circuit Brake 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 12.10 Ramp to Stop with OLV/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.
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).
Figure 12.11 Coast to Stop
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 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.
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