YASKAWA T1000A Technical Manual page 115

The wait time t is determined by the output frequency when the Run command is removed and by the active deceleration
time.
Figure 5.7
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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.). Setting parameter b1-04 to 1 instructs the drive to ignore any Reverse run commands.
No.
b1-04
Setting 0: Reverse operation enabled
Possible to operate the motor in both forward and reverse directions.
Setting 1: Reverse operation disabled
Drive disregards a Reverse run command or a negative frequency reference.
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b1-05: Action Selection below Minimum Output Frequency (CLV and CLV/PM)
Parameter b1-05 sets the operation when the frequency reference is lower than the minimum output frequency set in
parameter E1-09.
No.
b1-05
Setting 0: Follow the Frequency Reference
The drive adjusts the motor speed following the speed reference, even if the frequency reference is below the setting of
parameter E1-09. When the Run command is removed and the motor speed is smaller than the setting of b2-01, Zero
Speed Control (not position lock) is performed for the time set in parameter b2-04 before the drive output shuts off.
Figure 5.8
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
Run wait time t
Active deceleration time
Min Baseblock Time (L2-03)
Min output
frequency
Figure 5.7 Run Wait Time Depending on Output Frequency
Parameter Name
Reverse Operation Selection
Parameter Name
Action Selection below Minimum Output Frequency
Run OFF ON
Command
Frequency
reference
Zero Speed
IM: Initial Excitation
Control
PM: Zero Spd. Contr.
Motor
b2-03
Speed
Zero Speed Time at Start
Figure 5.8 Run at the Frequency Reference
Output frequency
(Max output
when Stop command
was entered
Setting Range
Setting Range
E1-09 Min.
Frequency
Zero Speed
Control
E1-09
b2-01 Zero
Speed Level
b2-04
Zero Speed Time at Stop
5.2 b: Application
100%
frequency)
Default
0 or 1 0
Default
0 to 3 0
5
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