YASKAWA FSDrive-MV1000 Parameter Manual page 106

2.2 b: Application
Setting 2: Run at the minimum frequency
Whenever a Run command is active and the frequency reference is smaller than the value of parameter E1-09, the drive
runs the motor at the speed set in E1-09. When the Run command is turned OFF, 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.
Figure 2.8
Setting 3: Zero Speed Control
The drive applies Zero Speed Control whenever the frequency reference setting is below the value of parameter E1-09.
When the Run command is removed, Zero Speed Control is stopped.
Figure 2.9
b1-06: Contact Input Reading
n
Defines how the contact 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 contact input is read once. If the state has changed, the input command is immediately processed. With this
setting, the drive responds more quickly to contact inputs, but a signal with electrical interference could cause erroneous
operation.
Setting 1: Read twice (2 ms scan)
The state of a contact input is read twice. The input command is processed only if the state does not change during the
double reading. This reading process is slower than the "Read once" process, but it is more resistant to signals with
electrical interference.
106
Run OFF ON
Command
Frequency
reference
Run at
E1-09
IM: Initial Excitation
Motor
Speed b2-03
DC Injection Braking (Zero
Speed Control) Time at Start
Figure 2.8 Run at the Minimum Frequency
Run OFF ON
Command
Frequency
reference
Zero
Speed
Control
IM: Initial Excitation
Motor
Speed b2-03
DC Injection Braking (Zero
Speed Control) Time at Start
Figure 2.9 Zero Speed Control
Name
Contact Input Reading
E1-09 Min.
Output Frequency
Run at
Zero Speed
E1-09
b2-01 Zero
Speed Level
b2-04
DC Injection Braking (Zero
Speed Control) Time at Stop
E1-09 Min.
Output Frequency
b2-01 Zero E1-09
Speed Level
b2-04
DC Injection Braking (Zero
Speed Control) Time at Stop
Setting Range
0 or 1
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide
Control
common_TMonly
Zero Speed
Control
common_TMonly
Default
1