12.3 b: Application
764 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
■ b8-05: Power Detection Filter Time
No.
(Hex.)
Name Description
Default
(Range)
b8-05
(01D0)
Expert
Power Detection Filter Time
Sets the time constant to measure output power.
20 ms
(0 - 2000 ms)
Decrease the setting value to increase responsiveness to load changes. If you set the value too low during operation at
light loads, motor speed is not stable.
■ b8-06: Search Operation Voltage Limit
No.
(Hex.)
Name Description
Default
(Range)
b8-06
(01D1)
Expert
Search Operation Voltage
Limit
Sets the voltage limit for Search Operation as a percentage of the motor rated voltage.
0%
(0 - 100%)
The Search Operation changes the output voltage in small increments to find a setpoint at which the drive can use
minimum power to operate.
Set this parameter to 0 to disable Search Operation. This will not disable Energy-saving control.
If the setting value is too low, the motor will stall when loads suddenly increase.
■ b8-16: PM E-Save Coefficient Ki
No.
(Hex.)
Name Description
Default
(Range)
b8-16
(01F8)
Expert
PM E-Save Coefficient Ki
Sets torque linearity. This parameter uses the Ki value from the motor nameplate. Usually it is not
necessary to change this setting.
1.00
(0.00 - 3.00)
When b8-16 = 1.00 (default), the drive will automatically calculate and control the energy-saving coefficient. If the
motor nameplate has a description for “Ki”, set this parameter to the Ki value.
Do this procedure to prevent oscillation when you set b8-01 = 1 [Energy Saving Control Selection = Enabled].
1. Check U5-21 [Energy Save Coeff Ki] and make sure that it aligns with the Ki value on the motor nameplate.
2. If the numbers are different, set b8-16 to the Ki value on the motor nameplate.
■ b8-17: PM E-Save Coefficient Kt
No.
(Hex.)
Name Description
Default
(Range)
b8-17
(01F9)
Expert
PM E-Save Coefficient Kt
Sets torque linearity. This parameter uses the Kt value from the motor nameplate. Usually it is not
necessary to change this setting.
1.00
(0.00 - 3.00)
When E5-01 = 1xxx, 2xxx [PM Motor Code Selection = Yaskawa SSR1 or SST4 series IPM motor], the drive
automatically calculates the energy-saving coefficient Kt and uses that value to control operation.
Do this procedure to prevent oscillation when you set b8-01 = 1 [Energy Saving Control Selection = Enabled].
1. Check U5-22 [Energy Save Coeff Kt] and make sure that it aligns with the Kt value on the motor nameplate.
2. If the numbers are different, set b8-17 to the Kt value on the motor nameplate.
■ b8-18: E-Save d-axis Current FilterTime
No.
(Hex.)
Name Description
Default
(Range)
b8-18
(01FA)
Expert
E-Save d-axis Current
FilterTime
Sets the d-axis current reference filter time constant.
0.100 s
(0.000 - 5.000 s)
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