2.9 L: Protection Functions
376 YASKAWA TOEPYAIGA5002A GA500 DRIVE PROGRAMMING
Figure 2.111 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.
Figure 2.112 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 at which the Stall Prevention function operates during acceleration
where the drive rated output current is 100%.
Determined by C6-01
(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 to the setting range changes when the setting for C6-01 [Normal / Heavy Duty Selection] changes.
–150% when C6-01 = 0 [Heavy Duty Rating]
–120% 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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