YASKAWA A1000 Series Quick Start Manual page 68

4 Start-Up Programming & Operation
b1-03: Stopping Method Selection
■
Select how the drive stops the motor when the Run command is removed or when a Stop command is entered.
No.
b1-03
Setting 0: Ramp to stop
When the Run command is removed, the drive will decelerate the motor to stop. The deceleration rate is determined by
the active deceleration time. The default deceleration time is set to parameter C1-02.
When the output frequency falls below the level set in parameter b2-01, the drive will start DC injection, Zero Speed
Control or Short Circuit Braking, depending on the selected control mode. Refer to
Frequency on page 69 for details.
Setting 1: Coast to stop
When the Run command is removed, the drive will shut off its output and the motor will coast (uncontrolled
deceleration) to stop. The stopping time is determined by the inertia and the friction in the driven system.
Figure 55
Note: After a stop is initiated, any subsequent Run command entered will be ignored until the minimum baseblock time (L2-03) has
expired. Do not enter Run command until it has come to a complete stop. To start the motor back up before it has stopped
completely, use DC Injection at start (refer to
Setting 2: DC Injection Braking to stop
When the Run command is removed, the drive will enter baseblock (turn off its output) for the minimum baseblock time
(L2-03). Once the minimum baseblock time has expired, the drive will brake the motor by injecting DC current into the
motor windings. The stopping time is significantly faster than when compared with simply coasting to stop. The level of
current used for DC Injection Braking is set by parameter b2-02 (default = 50%).
Note: This function is not available in the control modes for PM motors (A1-02 = 5, 6, 7).
Figure 56
68
Parameter Name
Stopping Method Selection
Run
command
ON
Output
frequency
Motor speed
Figure 55 Coast to Stop
b2-03 on page
Run
command
ON
Output
frequency
Motor speed
Motor coasts
Figure 56 DC Injection Braking to Stop
YASKAWA ELECTRIC TOEP C710616 21C YASKAWA AC Drive - A1000 Quick Start Guide
Setting Range
OFF
Drive output is shut off
133) or Speed Search (refer to
OFF
DC Injection Braking
with the current set in
b2-02
Minimum Baseblock
Time (L2-03)
0 to 3
b2-01: DC Injection Braking Start
b3: Speed Search on page 133).
Default
0