YASKAWA A1000 HHP Programming Manual page 23

Setting 2: Run at the Minimum Frequency
When a Run command is active and the frequency reference is smaller than the parameter E1-09 setting, the drive runs the
motor at the speed set in E1-09. When the Run command is removed, the drive decelerates the motor. As soon as the motor
speed reaches the zero speed level set in b2-01, Zero Speed Control is activated for the time set in b2-04.
Setting 3: Zero Speed Control
The drive applies Zero Speed Control whenever the frequency reference setting is below the value of parameter E1-09.
Remove the Run command when the drive is operating at or above the frequency set in E1-09 to activate Zero Speed Control
for the time set in b2-04, regardless of whether Zero Speed Control was already active.
n b1-06: Digital Input Reading
Defines how the digital inputs are read. The inputs are acted upon every 1 ms or 2 ms depending upon the setting.
No.
b1-06
Setting 0: Read once (1 ms scan)
The state of a digital input is read once. If the state has changed, the input command is immediately processed. With this setting
the drive responds more quickly to digital inputs, but a noisy signal could cause erroneous operation.
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Run OFF ON
Command
Frequency
reference
IM: Initial Excitation
PM: Zero Spd. Contr.
Motor
b2-03
Speed
Zero Speed Time at Start
Figure 1.9 Coast to Stop
Run OFF ON
Command
Frequency
reference
Run at
IM: Initial Excitation
E1-09
PM: Zero Spd. Contr.
Motor
Speed b2-03
Zero Speed Time at Start
Figure 1.10 Run at the Minimum Frequency
Run OFF ON
Command
Frequency
reference
Zero
Speed
IM: Initial Excitation
Control
PM: Zero Spd. Contr.
Motor
Speed b2-03
Zero Speed Time at Start
Figure 1.11 Zero Speed Control
Name
Digital Input Reading
E1-09 Min.
Frequency
Motor
Coasts
Zero Speed
b2-01 Zero
Control
Speed Level
b2-04
Zero Speed Time at Stop
E1-09 Min.
Frequency
Run at
Zero Speed
E1-09
Control
b2-01 Zero
Speed Level
b2-04
Zero Speed Time at Stop
E1-09 Min.
Frequency
Zero Speed
Control
b2-01 Zero
E1-09
Speed Level
b2-04
Zero Speed Time at Stop
Setting Range
1.2 b: Application
Default
0, 1 1
1
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