Parameter Details
12
12.9 L: Protection Functions
YASKAWA SIEPC71061753C GA500 Technical Manual 709
Figure 12.120 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 12.121 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%)
The stall prevention level set in L3-02 [Stall Prevent Level during Accel] is automatically reduced when the motor
is running within the constant output range. Parameter L3-03 is the limit value used to prevent the stall prevention
level during constant output ranges to fall below the minimum required level.
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