YASKAWA A1000 HHP Programming Manual page 142

1.8 L: Protection Functions
Setting 2: Intelligent Stall Prevention
The drive disregards the selected acceleration time and attempts to accelerate in the minimum time. The acceleration rate is
adjusted so the current does not exceed the value set to parameter L3-02.
n L3-02: Stall Prevention Level during Acceleration
Sets the output current level at which the Stall Prevention during acceleration is activated.
No.
L3-02
<1> The upper limit and default value is determined by the duty rating and the carrier frequency derating selection (C6-01 and L8-38 respectively).
• Lower L3-02 if stalling occurs when using a motor that is relatively small compared to the drive.
• Also set parameter L3-03 when operating the motor in the constant power range.
n
L3-03: Stall Prevention Limit during Acceleration
The Stall Prevention level is automatically reduced when the motor is operated in the constant power range. L3-03 sets the
lower limit for this reduction as a percentage of the drive rated current.
No.
L3-03
Stall Prevention level during Acceleration
n L3-22: Deceleration Time at Stall Prevention during Acceleration
Sets the brief deceleration time used when stalling occurs while accelerating a PM motor. When set to 0, this function is
disabled and the drive decelerates at the selected deceleration time when stalling occurs.
The function is effective only in OLV/ PM control and when parameter L3-01 is set to 1.
No.
L3-22 Deceleration Time at Stall Prevention During Acceleration
n L3-04: Stall Prevention Selection during Deceleration
Stall Prevention during deceleration controls the deceleration based on the DC bus voltage and prevents an overvoltage fault
caused by high inertia or rapid deceleration.
No.
L3-04
<1> Settings 3 through 5 are not available in OLV/PM. Settings 2 through 5 are not available in AOLV/PM and CLV/PM.
<2> Setting 3 is not available for models CIMR-Ao4A0930 and 4A1200.
<3> HHP models only have settings 0, 1, 4, and 5
Setting 0: Disabled
The drive decelerates according to the set deceleration time. With high inertia loads or rapid deceleration, an overvoltage fault
may occur. If an overvoltage fault occurs, use dynamic braking options or switch to another L3-04 selection.
142
Name
Stall Prevention Level during Acceleration
Name
Stall Prevention Limit during Acceleration
E1-06
Base frequency
Figure 1.98 Stall Prevention Level and Limit During Acceleration
Name
Name
Stall Prevention Selection During Deceleration
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Setting Range
0 to 150%
Setting Range
0 to 100%
L3-02
L3-03
Output frequency
Setting Range
0.0 to 6000.0 s
Setting Range
<1> <2> <3>
0 to 5
Default
<1> <1>
Default
50%
Default
0.0 s
Default
1