YASKAWA GA700 Technical Manual page 638

11.3 b: Application
Note:
The energy-saving coefficient is automatically configured when Rotational Auto-Tuning is performed.
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b8-05: Power Detection Filter Time
No.
Name
(Hex.)
b8-05 Power Detection
Filter Time
(01D0)
Reducing the setting value improves responsiveness to load changes. However, motor speed becomes unstable if
the setting value is too low during operation at light loads.
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b8-06: Search Operation Voltage Limit
No.
Name
(Hex.)
b8-06 Search Operation
Voltage Limit
(01D1)
The Search Operation is a function that changes the output voltage in fine increments to find a setpoint at which
the drive can operate using the minimum amount of power.
Setting this parameter to 0 disables the Search Operation function. However, energy-saving control will still be
enabled.
If the setting value is too low, the motor may stall when loads suddenly increase.
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b8-16: PM E-Save Coefficient Ki
No.
Name
(Hex.)
b8-16 PM E-Save
Coefficient Ki
(01F8)
The energy-saving coefficient is automatically calculated and controlled when b8-16 = 1.00 (default setting). If
the motor nameplate contains the "Ki" description, set this parameter to that Ki value.
Follow the following procedure to prevent oscillation that may occur when setting b8-01 = 1 [Energy Saving
Control Selection = Enabled].
1. Check U5-21 [AutoCalEnSav Coef Ki] and make sure it is the same as the Ki value written on the motor
nameplate.
2. If the numbers are different, then set b8-16 to the Ki value written on the motor nameplate.
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b8-17: PM E-Save Coefficient Kt
No.
Name
(Hex.)
b8-17 PM E-Save
Coefficient Kt
(01F9)
The drive controls operation with the Energy-saving coefficient Kt it automatically calculated internally when E5-
01 = 1xxx, 2xxx [PM Motor Code Selection = Yaskawa SSR1 or SST4 series IPM motor].
Follow the following procedure to prevent oscillation that may occur when setting b8-01 = 1 [Energy Saving
Control Selection = Enabled].
1. Check U5-22 [Auto Cal En Sav Coef Kt] and make sure it is the same as the Kt value written on the motor
nameplate.
2. If the numbers are different, then set b8-17 to the Kt value written on the motor nameplate.
638
V/f CL-V/f OLV CLV AOLV
Configures the time constant used by the drive to measure output power.
V/f CL-V/f OLV CLV AOLV
On the basis that the motor rated voltage is the 100% value, this parameter
configures the limit value of the voltage range defined for Search
Operations as a percentage.
V/f CL-V/f OLV CLV AOLV
This coefficient maintains torque linearity. Enter the Ki value written on the
motor nameplate. Normally there is no need to change this setting.
V/f CL-V/f OLV CLV AOLV
This coefficient maintains torque linearity. Enter the Kt value written on the
motor nameplate. Normally there is no need to change this setting.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default Setting
(Range)
20 ms
(0 - 2000 ms)
Default Setting
(Range)
0%
(0 - 100%)
Default Setting
(Range)
1.00
(0.00 - 3.00)
Default Setting
(Range)
1.00
(0.00 - 3.00)