10.11 L: Protection Functions
576 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
No.
(Hex.)
Name Description
Default
(Range)
Ref.
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)
980
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)
980
L8-11
(04B7)
Heatsink Fan Off-
Delay Time
Sets the length of time that the drive will wait before stopping the
cooling fan after cancelling the Run command when L8-10 = 0
[Heatsink Cooling Fan Ope Select = Dur Run (OffDly)].
60 s
(0 - 300 s)
980
L8-12
(04B8)
Ambient
Temperature
Setting
Sets the ambient temperature of the drive installation area.
40 °C
(-10 - +50 °C)
980
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)
980
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)
981
L8-19
(04BF)
Freq Reduction @
oH Pre-Alarm
Sets the ratio at which the drive derates the frequency reference
when during an oH alarm.
0.8
(0.1 to 0.9)
981
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)
981
L8-27
(04DD)
Overcurrent
Detection Gain
Sets the PM motor overcurrent detection level as a percentage of the
motor rated current value.
300.0%
(0.0 - 400.0%)
982
L8-29
(04DF)
Output Unbalance
Detection Sel
Sets the function to detect LF2.
0 : Disabled
1 : Enabled
1
(0, 1)
982
L8-31
(04E1)
LF2 Detection
Time
Sets the LF2 [Output Current Imbalance] detection time.
3
(1 to 100)
982
L8-32
(04E2)
Cooling Fan
Failure Selection
Sets operation when the drive detects FAn [Internal Agitating Fan
Fault].
0 : Ramp to Stop
1 : Coast to Stop
2 : Fast Stop (Use C1-09)
3 : Alarm Only
4 : Operate at Reduced Speed (L8-19)
1
(0 - 4)
982
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