11.9 L: Protection Function
752 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
Figure 11.90 Current Limit Method
■ 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 as a percentage of the drive rated output current that the drive uses
when the Stall Prevention function is enabled during acceleration.
Determined by L8-38
(0 - 150%)
Note:
• The upper limit of this setting is determined by L8-38 [Carrier Frequency Reduction].
• Motors may stall if continuing to operate at default settings when motor output is small relative to drive capacity. Decrease the setting
value if stalls occur.
• When you operate the motor in the constant power range, set L3-03 [Stall Prevent Limit during Accel].
■ 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.
Note:
The function to automatically reduce the stall prevention level does not operate when L3-01 = 3 [Stall Prevention during Accel =
Current Limit Method].
Figure 11.91 Stall Prevent Level during Accel/Limit
■ L3-04: Stall Prevention during Decel
No.
(Hex.)
Name Description
Default
(Range)
L3-04
(0492)
Stall Prevention during
Decel
Sets the method that the drive will use to prevent overvoltage faults when it decelerates.
0
(0 - 5)
Note:
To connect a dynamic braking option (braking resistor or braking resistor unit) to the drive, set this parameter to 0 or 3. If this parameter
is set to a value other than 0 or 3, then the Stall Prevention function during deceleration will be enabled, and the dynamic braking option
will not function.
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