11.11 L: Protection Functions
622 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
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.
Note:
The default setting and setting range is different for different models.
• 200 V Class and 400 V Class
Default: 1
Setting range: 0, 1
• 6-Phase/12-Pulse 400 V Class
Default: 4
Setting range: 0 - 4
The software version for 6-Phase/12-Pulse drive is PRG: 09015 and later. The “PRG”
column on the nameplate on the right side of the drive identifies the software version.
You can also use U1-25 [SoftwareNumber Flashr] to identify the software version.
0 : Disable
1 : Enabled
4 : Enabled, with Hardware Detection
Determined by o2-04
(0 - 4)
999
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)
1000
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)
1000
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 : Temperature-Dependent Fan Ctrl.
0
(0 - 2)
1001
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 Fan Operation Selection = During Run, w/
L8-11 Off-Delay].
60 s
(0 - 300 s)
1001
L8-12
(04B8)
Ambient Temperature
Setting
Sets the ambient temperature of the drive installation area.
40 °C
(-10 °C - +50 °C)
506
L8-15
(04BB)
Drive oL2 @ Low Speed
Protection
Sets the function to decrease the drive overload level at which the drive will trigger oL2
[Drive Overload] during low speed operation (6 Hz or slower) to prevent damage to the
main circuit transistors.
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)
1001
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)
1002
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)
1002
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)
1002
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