5.2 b: Application
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
213
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b7-02: Droop Control Delay Time
The setting in b7-02 adjusts the responsiveness of Droop control. Reduce the setting if the reaction time is too long, and
increase it if hunting occurs.
■
b7-03: Droop Control Limit Selection
Enables or disables the droop control limit.
Setting 0: Disabled
Setting 1: Enabled
◆
b8: Energy Saving
The Energy Saving feature improves overall system efficiency by operating the motor at its most efficient level.
Note: 1.
Energy Saving is not designed for applications that experience instantaneous heavy loads or applications that rarely operate with light
load conditions.
2.
As the performance of the Energy Saving function strongly depends on the accuracy of the motor data, always perform Auto-Tuning
and make sure the motor data has been entered correctly before using this function.
■
b8-01: Energy Saving Control Selection
Enables or disables the Energy Saving function.
Note:
Enabling the Energy Saving function when using a PM motor may adversely affect motor efficiency depending on the type of
PM motor. Disable the Energy Saving function in such cases.
Setting 0: Disabled
Setting 1: Enabled
■
b8-02: Energy Saving Gain (OLV, CLV)
Sets the gain level for Energy Saving. A higher value results in lower magnetization of the motor and thereby less energy
consumption. However, if b8-02 is too high, the motor may stall.
■
b8-03: Energy Saving Control Filter Time Constant (OLV, CLV)
Parameter b8-03 sets the response time for Energy Saving. Although lowering this value allows for a quicker response,
instability may result if it is too low.
■
b8-04: Energy Saving Coefficient Value (V/f, V/f w/PG)
Parameter b8-04 is used to fine-tune Energy Saving control. The default setting depends on the capacity of the drive.
This default setting is for a standard Yaskawa motor. If using a motor other than a standard one, adjust the default setting
of b8-04 in increments of around 5% until the output power monitor U1-08 is at the minimum value, while running the
drive with a light load.
A low setting results in less output voltage and less energy consumption, but too small a value will cause the motor to
stall.
No.
Parameter Name
Setting Range
Default
b7-02
Droop Control Delay Time
0.03 to 2.00 s
0.05 s
No.
Parameter Name
Setting Range
Default
b7-03
Droop Control Limit Selection
0, 1
1
No.
Parameter Name
Setting Range
Default
b8-01
Energy Saving Control Selection
0 or 1
Determined by A1-02
No.
Name
Setting Range
Default
b8-02
Energy Saving Gain
0.0 to 10.0
Determined by A1-02
No.
Name
Setting Range
Default
b8-03
Energy Saving Control Filter Time Constant
0.00 to 10.00 s
Determined by
A1-02, C6-01, and o2-04
No.
Name
Setting Range
Default
b8-04
Energy Saving Coefficient Value
0.00 to 655.00
Determined by
C6-01, E2-11, and o2-04
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