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)
Figure 5.10 Run Wait Time Depending on Output Frequency
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.
Parameter Name
Setting Range
Default
b1-04
Reverse Operation Selection
0, 1
0
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.
Parameter Name
Setting Range
Default
b1-05
Action Selection below Minimum Output Frequency
0 to 3
0
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.
Zero Speed
Control
b2-01 DC Injection
Braking Start Freq.
Run
Command
Frequency
reference
Motor
Speed
OFF
ON
Zero Speed
Control
E1-09 Min.
Output Frequency
b2-04
DC Inj. Braking Time at Stop
E1-09
b2-03
DC Inj. Braking Time at Start
IM: Initial Excitation
PM: Zero Spd. Contr.
Figure 5.11 Run at the Frequency Reference
Setting 1: Coast to Stop
The motor starts when the frequency reference meets or exceeds the 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.
5.2 b: Application
192
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
Summary of Contents for U1000 iQpump Drive
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