11.9 L: Protection Functions
964 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
■ L3-27: Stall Prevention Detection Time
No.
(Hex.)
Name Description
Default
(Range)
L3-27
(0456)
Stall Prevention
Detection Time
Sets a delay time between reaching the Stall Prevention level and starting
the Stall Prevention function.
50 ms
(0 - 5000 ms)
■ L3-34: Torque Limit Delay Time
No.
(Hex.)
Name Description
Default
(Range)
L3-34
(016F)
Expert
Torque Limit Delay
Time
Sets the filter time constant that returns the torque limit to its initial value
when KEB operation operates in Single Drive KEB Ride-Thru mode.
Determined by A1-02
(0.000 - 1.000 s)
When vibration occurs during operation of Single Drive KEB Ride-Thru 2, increase this parameter in 0.010-unit
increments.
Note:
The Single Drive KEB Ride-Thru 2 mode operates when L2-29 = 1 [KEB Method Selection = Single Drive KEB Ride-Thru 2] and H1-
xx = 7A or 7B [Terminal Sx Function Selection = KEB Ride-Thru 2 (N.C./N.O.)].
■ L3-35: Speed Agree Width for Auto Decel
No.
(Hex.)
Name Description
Default
(Range)
L3-35
(0747)
Expert
Speed Agree Width
for Auto Decel
Sets the width for speed agreement when L3-04 = 2 [Decel Stall Prevention
Selection = Automatic Decel Reduction]. Usually it is not necessary to
change this setting.
0.00 Hz
(0.00 - 1.00 Hz)
Set this parameter when hunting occurs while you use a frequency reference through an analog input.
■ L3-36: Current Suppression Gain@Accel
No.
(Hex.)
Name Description
Default
(Range)
L3-36
(11D0)
Current Suppression
Gain@Accel
Sets the gain to suppress current and motor speed hunting during operation
when L3-01 = 3 [Stall Prevention during Accel = Current Limit Method].
Usually it is not necessary to change this setting.
Determined by A1-02
(0.0 - 100.0)
If there is vibration in the output current during acceleration, increase the setting value.
Note:
Set L3-01 = 3 [Stall Prevention during Accel = Current Limit Method] to enable this function.
■ L3-37: Current Limit P Gain @ Accel
No.
(Hex.)
Name Description
Default
(Range)
L3-37
(11D1)
Expert
Current Limit P Gain
@ Accel
Usually it is not necessary to change this setting.
5 ms
(0 - 100 ms)
Note:
Set L3-01 = 3 [Stall Prevent Limit during Accel = ILim Mode] to enable this function.
■ L3-38: Current Limit I Time @ Accel
No.
(Hex.)
Name Description
Default
(Range)
L3-38
(11D2)
Expert
Current Limit I Time
@ Accel
Suppresses current hunting and overshooting that occurs when the drive
stalls during acceleration. Usually it is not necessary to change this setting.
10.0
(0.0 - 100.0)
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