5.2 b: Application
186 YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
The time for DC Injection Braking is determined by the value set to b2-04 and by the output frequency at the time the
Run command is removed. It can be calculated by:
Figure 5. 8
Figure 5.8 DC Injection Braking Time Depending on Output Frequency
Note: If an overcurrent (oC) fault occurs during DC Injection Braking to stop, lengthen the momentary power loss minimum baseblock
time (L2-03) until the fault no longer occurs.
Setting 3: Coast to Stop with Timer
When the Run command is removed, the drive will turn off its output and the motor will coast to stop. If a Run command
is input before the time t (value of C1-02) has expired, the drive will not start. A Run command activated during time t
must be cycled after t has expired in order to start the drive.
Figure 5. 9
Figure 5.9 Coast to Stop with Timer
The wait time t is determined by the output frequency when the Run command is removed and by the active deceleration
time.
Figure 5. 10
Figure 5.10 Run Wait Time Depending on Output Frequency
■ b1-04: Reverse Operation Selection
For some applications, reverse motor rotation is not appropriate and may cause problems (e.g., air handling units, pumps,
etc.).
Note: Setting parameter b1-04 to 1 instructs the drive to ignore any Reverse run commands.
Setting 0: Reverse operation enabled
Possible to operate the motor in both forward and reverse directions.
No. Parameter Name Setting Range Default
b1-04 Reverse Operation Selection 0 or 1 0
DC Injection brake time
(b2-04) × 10 × Output frequency
Max. output frequency (E1-04)
=
Output frequency when
Stop command was entered
100%
(Maximum output
frequency)
10%
DC Injection braking time
b2-0410
b2-04
Drive output shut off
Run wait time t
Run command
Output
frequency
ON ON ONOFF OFF
Min output
frequency
100%
(Max output
frequency)
Output frequency
when Stop command
was entered
Run wait time t
Active deceleration time
Momentary Power Loss
Minimum Baseblock Time (L2-03)
SIEP_C710636_02B_1_0.book 186 ページ ２０１５年１１月２５日 水曜日 午後４時５６分
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