YASKAWA A1000 Series Quick Start Manual page 140

4.6 Basic Drive Setup Adjustments
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. Use DC Injection at Start
page 138) or Speed Search
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). When the minimum baseblock time has expired, the drive will inject the amount DC Injection Braking is set in
parameter b2-02 into the motor windings to brake the motor. The stopping time in DC Injection Braking to Stop is significantly
faster compared to Coast to Stop.
Note: This function is not available in CLV or in control modes for PM motors (A1-02 = 5, 6, 7).
Motor speed
DC Injection Braking time is determined by the value set to b2-04 and the output frequency at the time the Run command is
removed. It can be calculated by:
Note: If an overcurrent (oC) fault occurs during DC Injection Braking to Stop, lengthen the minimum baseblock time (L2-03) until the fault no
longer occurs.
140
Run
command
Output
frequency
Motor speed
Figure 4.13 Coast to Stop
(Refer to b3: Speed Search on page
Run
command
ON
Output
frequency
Motor coasts
Figure 4.14 DC Injection Braking to Stop
DC Injection brake time
DC Injection braking time
b2-04×10
b2-04
10%
Stop command was entered
Figure 4.15 DC Injection Braking Time Depending on Output Frequency
ON OFF
Drive output is shut off
253) to restart the motor before it has completely stopped.
OFF
DC Injection Braking
with the current set in
b2-02
Minimum Baseblock
Time (L2-03)
(b2-04) x 10 x Output frequency
=
Maximum output frequency (E1-04)
Output frequency when
(Maximum output
YASKAWA ELECTRIC TOEP C710616 41G YASKAWA AC Drive - A1000 Quick Start Guide
(Refer to b1-02: Run Command Selection 1 on
100%
frequency)