YASKAWA A1000 HHP Programming Manual page 22

1.2 b: Application
n b1-04: Reverse Operation Selection
Enables and disables Reverse operation. For some applications, reverse motor rotation is not appropriate and may cause
problems (e.g., air handling units, pumps, etc.).
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.
n
b1-05: Action Selection below Minimum Output Frequency (CLV and CLV/PM)
Sets the operation when the frequency reference is lower than the minimum output frequency set in parameter E1-09.
No.
b1-05 Action Selection below Minimum Output Frequency
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.
Setting 1: Coast to Stop
The motor starts when the frequency reference exceeds the parameter E1-09 setting. When the motor is running and the
frequency reference falls below E1-09, the drive output shuts off and the motor coasts. When the motor speed falls below the
zero speed level set in b2-01, Zero Speed Control is activated for the time set in b2-04.
22
Run wait time t
Active deceleration time
Momentary Power Loss
Minimum Baseblock
Time (L2-03)
Min output
frequency
Figure 1.7 Run Wait Time Depending on Output Frequency
Parameter Name
Reverse Operation Selection
Parameter Name
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 1.8 Run at the Frequency Reference
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Output frequency
when Stop command
was entered
E1-09 Min.
Frequency
E1-09
b2-01 DC Injection
Speed Level
b2-04
Zero Speed Time at Stop
100%
(Max output
frequency)
Setting Range
0, 1
Setting Range
0 to 3
Zero Speed
Control
Default
0
Default
0