7 basic drive setup adjustments – Yaskawa Z1000 AC Drive HVAC User Manual
Page 124
Drive output is shut off
Run
command
Output
frequency
Motor speed
ON
OFF
Figure 4.14 Coast to Stop
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 (
Refer to b2: DC Injection Braking and Short
Refer to b3: Speed Search on page 265
) to restart the motor before it has completely
stopped.
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 current 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 OLV/PM control mode (A1-02 = 5).
Motor coasts
DC Injection Braking
with the current set in
b2-02
Run
command
Output
frequency
ON
OFF
Motor speed
Minimum Baseblock
Time (L2-03)
Figure 4.15 DC Injection Braking to Stop
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:
DC Injection brake time
(b2-04) x 10 x Output frequency
Max. output frequency (E1-04)
=
4.7 Basic Drive Setup Adjustments
124
YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual