n
b8-04: Energy Saving Coefficient Value (V/f Control)
Fine tunes Energy Saving control.
The default setting is for a standard Yaskawa motor. When using a different motor, adjust this parameter in 5% increments
while running the drive with a light load until output power monitor U1-08 is at the minimum value.
A low setting results in less output voltage and less energy consumption. If the value is set too low the motor may stall. The
default setting depends on the capacity of the drive.
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
Note:
This default value changes if the motor rated capacity set to E2-11 is changed. The Energy Saving coefficient is set automatically when
Auto-Tuning for Energy Saving is performed (
Refer to Auto-Tuning on page 102
).
n
b8-05: Power Detection Filter Time (V/f Control only)
The Energy Saving function continuously searches out the lowest output voltage in order to achieve minimum output power.
Parameter b8-05 determines how often the output power is measured and the output voltage is adjusted.
No.
Name
Setting Range
Default
b8-05
Power Detection Filter Time
0 to 2000 ms
20 ms
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b8-06: Search Operation Voltage Limit (V/f Control only)
Sets the voltage limit for the optimal output voltage detection of Speed Search as a percentage of the maximum output voltage.
During the search operation the drive will keep the output voltage above this level to prevent motor stalling.
Note:
If set too low, the motor may stall with a sudden increase to the load. Disabled when b8-06 = 0. Setting this value to 0 does not disable
Energy Saving.
No.
Name
Setting Range
Default
b8-06
Search Operation Voltage Limit
0 to 100%
0%
n
Parameters Related to the Energy Saving Function
Open Loop Vector Control
No.
Parameter Name
Setting Range
Default
E2-02
<1>
Motor Rated Slip
0.00 to 20.00
<2>
<1> Automatically set when Rotational Auto-Tuning is performed.
<2> Default setting is determined by drive capacity (o2-04).
V/f Control
No.
Parameter Name
Setting Range
Default
E2-11
<1>
Motor Rated Capacity
0.00 to 650.00 kW
<2>
<1> Automatically set when Auto-Tuning is performed.
<2> Default setting is determined by drive capacity (o2-04).
5.2 b: Application
146
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual