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Frequency reference
15% of rated current
L3-02
Output current
Output frequency
Figure 1.65 Current-Limited Acceleration
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L3-02/L3-14: Stall Prevention Level during Acceleration/Deceleration
Set the output voltage level at which to enable stall prevention during acceleration and deceleration as a percentage of drive
rated current. L3-02 is valid when stall prevention is selected during acceleration (L3-01 = 1, 3). L3-14 is valid when stall
prevention is selected during deceleration (L3-04 = 1, 6). Decrease the setting values if stalling occurs when parameters are
set to default. There is normally no need to change these parameters from their default values.
No.
Name
Setting Range
Default
L3-02
Stall Prevention Level during Acceleration
0 to 150%
<1>
<1>
L3-14
Stall Prevention Level during Deceleration
80 to 150%
<1>
<1>
<1> The upper limit and default value are determined by C6-01, Drive Duty Selection, and L8-38, Carrier Frequency Reduction Selection.
• Stalling may occur when the motor is rated at a smaller current than the drive rated output current and the stall prevention
default settings are used. Set L3-02/L3-14 appropriately if stalling occurs.
• Also set parameter L3-03 when operating the motor in the constant power range.
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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.
Name
Setting Range
Default
L3-03
Stall Prevention Limit during Acceleration
0 to 100%
50%
Stall Prevention level during Acceleration
Output frequency
L3-03
E1-06
Base frequency
L3-02
Figure 1.66 Stall Prevention Level and Limit During Acceleration
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L3-04: Stall Prevention Selection during Deceleration
Stall prevention during deceleration prevents the motor from stalling when a large load is imposed on the motor or rapid
deceleration is performed.
No.
Name
Setting Range
Default
L3-04
Stall Prevention Selection During Deceleration
0, 1, 4, 6
<1>
1
<1> Setting 4 is not available in OLV/PM.
1.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710636 10C Z1000U HVAC MATRIX Drive Programming Manual
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Parameter Details