YASKAWA GA700 Technical Manual page 869

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L8-27: Overcurrent Detection Gain
No.
Name
(Hex.)
L8-27 Overcurrent
Detection Gain
(04DD)
When the drive rated current is considerably higher than the motor rated current, PM motor magnets may
demagnetize when current flows at the drive overcurrent detection level. To prevent motor demagnetization, the
overcurrent detection level is adjusted when set to a low value.
Note:
The overcurrent detection function detects whichever of the following values is lower.
• Drive overcurrent level
• Motor rated current × L8-27 / 100
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L8-29: Current Unbalance Detect (LF2)
No.
Name
(Hex.)
L8-29 Current Unbalance
Detect (LF2)
(04DF)
This function protects PM motors. Current unbalance can heat a PM motor and demagnetize the magnets. LF2 is
detected when the current is in an unbalanced state, which stops the motor to prevent motor damage.
0 : Disabled
1 : Enabled
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L8-31: LF2 Detection Time
No.
Name
(Hex.)
L8-31 LF2 Detection Time
(04E1)
LF2 faults are detected when the output current is imbalanced longer than the time set with L8-31.
Note:
• Parameter L8-31 is enabled when L8-29 = 1 [Current Unbalance Detect (LF2) = Enabled].
• When misdetections of LF2 occur, increase the setting value of L8-31 in increments of 5 to make adjustments.
• Parameter L8-31 appears only when E9-01 = 1 [Motor Type Selection = PM] under EZ Open Loop Vector Control.
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L8-32: Cooling Fan Failure Selection
No.
Name
(Hex.)
L8-32 Cooling Fan Failure
Selection
(04E2)
0 : Ramp to Stop
The drive ramps the motor to stop according to the deceleration time. The terminal turns on when H2-xx = E
[MFDO Function Select = Fault] is set.
1 : Coast to Stop
The drive shuts off output and the motor coasts to stop. The terminal turns on when H2-xx = E.
2 : Fast-Stop
The drive stops the motor using the deceleration time set with C1-09 [Fast Stop Time]. The terminal turns on
when H2-xx = E.
3 : Alarm Only
FAn appears on the keypad, and the drive continues operating. The terminal turns on when H2-xx = 10 [MFDO
Function Select = Minor Fault].
4 : Run@L8-19 Rate
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
V/f CL-V/f OLV CLV AOLV
Sets the PM motor overcurrent detection level as a percentage of the motor
rated current value.
V/f CL-V/f OLV CLV AOLV
Enables or disables the detection of LF2.
V/f CL-V/f OLV CLV AOLV
Sets the LF2 [Output Current Imbalance] detection time.
V/f CL-V/f OLV CLV AOLV
Selects the drive operation when FAn [Internal Agitating Fan Fault] occurs.
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
11.9 L: Protection Function
Default
(Range)
300.0%
(0.0 - 400.0%)
Default Setting
(Range)
1
(0, 1)
Default Setting
(Range)
3
(1 to 100)
Default Setting
(Range)
1
(0 to 4)
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