YASKAWA GA800 Technical Reference page 977

Figure 12.131 Stall Prevention During Acceleration Function in OLV/PM
2 : Intelligent (Ignore Accel 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 adjust 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.
■
L3-02: Stall Prevent Level during Accel
No.
Name
(Hex.)
L3-02 Stall Prevent Level during
Accel
(0490)
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.
Name
(Hex.)
L3-03 Stall Prevent Limit during
Accel
(0491)
YASKAWA SIEPC71061737D GA800 Drive Technical Reference
Figure 12.132 Current Limit Acceleration
V/f CL-V/f OLV CLV AOLV
Sets the output current level to activate the Stall Prevention function during acceleration as a
percentage of the drive rated output current.
V/f CL-V/f OLV CLV AOLV
Sets the lower limit for the stall prevention level used in the constant output range as a percentage of
the drive rated output current.
12.9 L: Protection Functions
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default
(Range)
Determined by C6-01 and
L8-38
(0 - 150%)
Default
(Range)
50%
(0 - 100%)
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