Parameter Details
5
5.8 L: Protection Functions
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference 323
The Stall Prevention function does not operate during acceleration, and acceleration occurs for the set acceleration
time. If the acceleration time is too short, the motor will not fully accelerate during the set time, which causes the
drive to detect oL1 or oL2 and the motor to stop.
1 : Enabled
Enables the Stall Prevention During Acceleration function.
The drive stops acceleration if the output current is more than L3-02 [Stall Prevent Level during Accel]. If the output
current is less than L3-02 - 15%, the drive stops deceleration. The Stall Prevention function level automatically
decreases for constant output ranges.
L3-02: Stall Prevent Level during Accel
Figure 5.71 Stall Prevention During Acceleration when Using Induction Motors
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.
â– 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 L8-38
(0 - 120%)
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].
â– 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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