YASKAWA GA800 Technical Reference page 1029

When you operate an SPN motor, set this parameter to 0.
Adjust this parameter in these conditions:
• If the load is large and motor rotation is not stable, decrease the setting value.
• If you change the E5 parameters [PM Motor Settings], set n8-49 = 0, then adjust this parameter.
■
n8-50: Medium Load Iq Level (High)
No.
Name
(Hex.)
n8-50 Medium Load Iq Level
(High)
(053D)
■
n8-51: Pull-in Current @ Acceleration
No.
Name
(Hex.)
n8-51 Pull-in Current @
Acceleration
(053E)
Adjust in the following situations.
• When the motor does not smoothly because of large loads, increase the setting value in 5% increments.
• If too much current flows during acceleration, decrease the setting value.
Note:
When A1-02 = 8 [Control Method Selection = EZOLV], this parameter will always be in effect for speed ranges less than n7-10 [Pull-in
Current Switching Speed].
■
n8-52: ACR P Gain
No.
Name
(Hex.)
n8-52 ACR P Gain
(053F)
Expert
■
n8-54: Voltage Error Compensation Time
No.
Name
(Hex.)
n8-54 Voltage Error Compensation
Time
(056D)
Expert
Adjust this parameter in these conditions:
• If oscillation occurs at the time of start up, increase the setting value.
• If hunting occurs when operating at low speed, increase the setting value.
• If fast changes in the load cause hunting, increase the setting value in 0.1-unit increments. If you cannot stop
hunting, set n8-51 [Pull-in Current @ Acceleration] to 0% and set n8-54 to 0.00 s, and disable compensation for
voltage errors.
■
n8-55: Motor to Load Inertia Ratio
No.
Name
(Hex.)
n8-55 Motor to Load Inertia Ratio
(056E)
Sets the ratio between motor inertia and machine inertia to adjust the ACR.
Adjust in the following situations.
YASKAWA SIEPC71061737D GA800 Drive Technical Reference
V/f CL-V/f OLV CLV AOLV
Sets the load current level to start high efficiency control as a percentage of E5-03 [PM Motor Rated
Current (FLA)]. Usually it is not necessary to change this setting.
V/f CL-V/f OLV CLV AOLV
Sets the pull-in current allowed to flow during acceleration/deceleration as a percentage of the motor
rated current.
V/f CL-V/f OLV CLV AOLV
Sets the proportional gain of the current regulator. Usually it is not necessary to change this setting.
V/f CL-V/f OLV CLV AOLV
Sets the time constant that the drive uses when adjusting for voltage errors.
V/f CL-V/f OLV CLV AOLV
Sets the ratio between motor inertia and machine inertia.
12.10 n: Special Adjustment
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
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default
(Range)
80%
(50 - 255%)
Default
(Range)
Determined by A1-02
(0 - 200%)
Default
(Range)
10.0
(-100.0 - 100.0)
Default
(Range)
1.00 s
(0.00 - 10.00 s)
Default
(Range)
0
(0 - 3)
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