u
b8: Energy Saving
The Energy Saving feature improves overall system operating efficiency by operating the motor at its most efficient level.
Note: 1. Energy Saving is designed for applications with variable torque (Normal Duty) and is not appropriate for applications where the load may
suddenly increase.
2. The performance of the Energy Saving function depends on the accuracy of the motor data. Always perform Auto-Tuning and correctly
enter the motor data before using this function.
n
b8-01: Energy Saving Control Selection
Enables or disables the Energy Saving function.
No. Parameter Name Setting Range Default
b8-01 Energy Saving Control Selection 0, 1
Determined by
A1-02
Setting 0: Disabled
Setting 1: Enabled
n
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 less energy consumption.
If the value is set too low the motor may stall.
No. Name Setting Range Default
b8-02 Energy Saving Gain 0.0 to 10.0
Determined by
A1-02
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b8-03: Energy Saving Control Filter Time Constant (OLV, CLV)
Sets the response time for Energy Saving. A lower value allows for a quicker response; however a value that is too low may
cause instability.
No. Name Setting Range Default
b8-03 Energy Saving Control Filter Time Constant 0.00 to 10.00 s
Determined by
A1-02 and o2-04
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b8-04: Energy Saving Coefficient Value (V/f, V/f w/PG)
Fine tunes Energy Saving control. Adjust this setting while viewing the output power monitor (U1-08) and running the drive
with a light load.
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: The 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 100).
n
b8-05: Power Detection Filter Time (V/f, V/f w/PG)
Determines how often in milliseconds the output power is measured. The Energy Saving function continuously searches out
the lowest output voltage to achieve minimum output power.
Reducing this setting increases the response time. If the filter time is too short, the motor may become unstable with a lighter
load.
No. Name Setting Range Default
b8-05 Power Detection Filter Time 0 to 2000 ms 20 ms
5.2 b: Application
152
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
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