2.9 L: Protection Functions
454 YASKAWA TOEPYAIGA8002B GA800 Drive Programming
Figure 2.131 Stall Prevention During Acceleration Function in OLV/PM
2 : Intelligent (Ignore Decel Ramp)
The drive ignores the acceleration time setting and the drive starts to accelerate in the minimum length of time. The
drive automatically adjusts the acceleration rate to make sure that the output current is not more than L3-02.
3 : Current Limit Acceleration
This function uses the L3-02 value to limit the output current and automatically adjusts the acceleration rate. When
the load (output current) increases to more than the current limit level during acceleration, the drive automatically
adjusts the acceleration rate.
Figure 2.132 Current Limit Acceleration
■ L3-02: Stall Prevent Level during Accel
No.
(Hex.)
Name Description
Default
(Range)
L3-02
(0490)
Stall Prevent Level during
Accel
Sets the output current level to activate the Stall Prevention function during acceleration as a
percentage of the drive rated output current.
Determined by C6-01 and
L8-38
(0 - 150%)
Note:
• If you use a motor that is small compared to the drive and the motor stalls, decrease the setting value.
• When you operate the motor in the constant power range, set L3-03 [Stall Prevent Limit during Accel].
• The upper limit of the setting range changes when C6-01 [Normal / Heavy Duty Selection] changes.
–150% when C6-01 = 0 [Heavy Duty Rating].
–110% when C6-01 = 1 [Normal Duty Rating].
■ L3-03: Stall Prevent Limit during Accel
No.
(Hex.)
Name Description
Default
(Range)
L3-03
(0491)
Stall Prevent Limit during
Accel
Sets the lower limit for the stall prevention level used in the constant output range as a percentage of
the drive rated output current.
50%
(0 - 100%)
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