Parameter List
1
1.11 L: Protection Functions
YASKAWA TOEPYAIGA8002B GA800 Drive Programming 89
No.
(Hex.)
Name Description
Default
(Range)
Ref.
L8-05
(04B1)
Input Phase Loss
Protection Sel
Sets the function to enable and disable input phase loss detection.
0 : Disabled
1 : Enabled
1
(0, 1)
476
L8-07
(04B3)
Output Phase Loss
Protection Sel
Sets the function to enable and disable output phase loss detection. The drive starts output
phase loss detection when the output current decreases to less than 5% of the drive rated
current.
Note:
The drive can incorrectly start output phase loss detection in these conditions:
• The motor rated current is very small compared to the drive rating.
• The drive is operating a PM motor with a small load.
0 : Disabled
1 : Fault when one phase is lost
2 : Fault when two phases are lost
1
(0 - 2)
477
L8-09
(04B5)
Output Ground Fault
Detection
Sets the function to enable and disable ground fault protection.
0 : Disabled
1 : Enabled
Determined by o2-04
(0, 1)
477
L8-10
(04B6)
Heatsink Fan Operation
Selection
Sets operation of the heatsink cooling fan.
0 : During Run, w/ L8-11 Off-Delay
1 : Always On
2 : On when Drive Temp Reaches L8-64
0
(0 - 2)
477
L8-11
(04B7)
Heatsink Fan Off-Delay
Time
Sets the length of time that the drive will wait before it stops the cooling fan after it cancels
the Run command when L8-10 = 0 [Heatsink Cooling Fan Ope Select = Dur Run
(OffDly)].
60 s
(0 - 300 s)
478
L8-12
(04B8)
Ambient Temperature
Setting
Sets the ambient temperature of the drive installation area.
40 °C
(-10 - +50 °C)
478
L8-15
(04BB)
Drive oL2 @ Low Speed
Protection
Sets the function to decrease drive overload at low speeds to prevent damage to the main
circuit transistor during low speed operation (at 6 Hz or slower) to prevent oL2 [Drive
Overloaded].
Note:
Contact Yaskawa or your nearest sales representative before disabling this function at
low speeds. If you frequently operate drives with high output current in low speed
ranges, it can cause heat stress and decrease the life span of drive IGBTs.
0 : Disabled (No Additional Derate)
1 : Enabled (Reduced oL2 Level)
1
(0, 1)
478
L8-18
(04BE)
Software Current Limit
Selection
Set the software current limit selection function to prevent damage to the main circuit
transistor caused by too much current.
0 : Disabled
1 : Enabled
0
(0, 1)
478
L8-19
(04BF)
Freq Reduction @ oH
Pre-Alarm
Sets the ratio at which the drive derates the frequency reference during an oH alarm.
0.8
(0.1 - 0.9)
478
L8-20
(04C0)
Expert
Control Fault & Step Out
Detect
Sets operation after the drive detects a CF fault when A1-02 = 4 [Control Method
Selection = Advanced Open Loop Vector].
0 : Disabled
1 : CF/STPo Detection Enabled
2 : CF ALM/Stop
1
(0 - 2)
479
L8-27
(04DD)
Overcurrent Detection
Gain
Sets the PM motor overcurrent detection level as a percentage of the motor rated current
value.
Note:
Parameter A1-02 [Control Method Selection] selects which parameter is the motor
rated current.
• A1-02 ≠ 8 [EZOLV]: E5-03 [Motor Rated Current (FLA)]
• A1-02 = 8: E9-06 [Motor Rated Current (FLA)]
300.0%
(0.0 - 1000.0%)
479
L8-29
(04DF)
Output Unbalance
Detection Sel
Sets the function to detect LF2.
0 : Disabled
1 : Enabled
1
(0, 1)
479
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