YASKAWA Z1000U Series Quick Start Manual page 54

i.5 Start-Up Programming and Operation
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 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.
Setting 3: Coast with Timer
When the Run command is removed, the drive will turn off its output and the motor will coast to stop. The drive will not start
if a Run command is input before the time t (C1-02) has expired. Cycle the Run command that was activated during time t
after t has expired to start the drive.
54
Run
command
ON
Output
frequency
Motor coasts
Figure i.46 DC Injection Braking to Stop
DC Injection brake time
DC Injection braking time
b2-04×10
b2-04
10%
Stop command was entered
Figure i.47 DC Injection Braking Time Depending on Output Frequency
Run command
ON
Output
frequency
Figure i.48 Coast with Timer
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
OFF ON
Drive output shut off
Run wait time t
YASKAWA ELECTRIC TOEP C710636 11E Z1000U HVAC MATRIX Drive Quick Start Guide
100%
frequency)
OFF ON