YASKAWA GA700 Technical Manual page 845

The drive stops acceleration once the output current exceeds the value set in L3-02. Deceleration starts in
accordance with the value set in L3-22 [Dec Time at Stall Prevent during Acc] once the time set in L3-27 [Stall
Prevention Detection Time] elapses while the output current is at least the value set in L3-02. Deceleration is
stopped once the output current falls below the value set in L3-02 - 15%. Acceleration starts again after the time
set in L3-27 elapses.
Figure 11.128 Stall Prevention During Acceleration Function under Open Loop Vector Control for PM
2 : Automatic Decel Reduction
The setting value for the acceleration time is ignored, and acceleration starts in the minimum amount of time. The
acceleration rate is automatically adjusted so that the output current does not exceed the value set in L3-02.
3 : General Purpose w/ DB resistor
This function limits the output current with the value set for L3-02 and automatically adjusts the acceleration rate.
The acceleration rate is automatically adjusted when the load (output current) increases and exceeds the current
limit level during acceleration.
■
L3-02: Stall Prevent Level during Accel
No.
Name
(Hex.)
L3-02 Stall Prevent Level
during Accel
(0490)
Note:
• The upper limit and default for this setting is determined by C6-01 [Normal / Heavy Duty Selection] and L8-38 [Carrier Frequency
Reduction].
• Lower the setting value if stalling occurs when using a motor that is relatively small compared to the drive.
• Also set L3-03 [Stall Prevent Limit during Accel] when operating the motor in the constant power range.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Figure 11.129 Current Limit Acceleration
V/f CL-V/f OLV CLV AOLV
Sets the output current level used when the Stall Prevention function is
enabled during acceleration, as a percentage of the drive rated output
current.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
11.9 L: Protection Function
Default
(Range)
Determined by C6-01
and L8-38
(0 - 150%)
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