Parameter List
11
11.11 L: Protection Functions
YASKAWA SIEPC71061753C GA500 Technical Manual 421
◆ L3: Stall Prevention
No.
(Hex.)
Name Description
Default
(Range)
Ref.
L3-01
(048F)
Stall Prevention during
Accel
Sets the method of the Stall Prevention During Acceleration.
0 : Disable
1 : Enabled
2 : Intelligent (Ignore Accel Ramp)
3 : Current Limit Acceleration
1
(0 - 3)
708
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%.
Note:
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]
Determined by C6-01
(0 - 150%)
709
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%)
709
L3-04
(0492)
Stall Prevention during
Decel
Sets the method that the drive will use to prevent overvoltage faults when decelerating.
Note:
1. To connect a dynamic braking option (braking resistor or braking resistor unit)
to the drive, set this parameter to 0 or 3. Parameter settings 1, 2, 4, 5, and 7 will
enable Stall Prevention function during deceleration, and the dynamic braking
option will not function.
2. The setting range changes when the A1-02 [Control Method Selection] value
changes:
• When A1-02 = 5 [OLV/PM], the setting range is 0 to 2.
• When A1-02 = 6 or 8 [AOLV/PM or EZOLV], the setting range is 0 or 1.
0 : No
1 : General Purpose
2 : Intelligent (Ignore Decel Ramp)
3 : General Purpose w/ DB resistor
4 : Overexcitation/High Flux
5 : Overexcitation/High Flux 2
7 : Overexcitation/High Flux 3
1
(Determined by A1-02)
710
L3-05
(0493)
Stall Prevention during
RUN
Sets the function to enable and disable Stall Prevention During Run.
Note:
• An output frequency less than 6 Hz disables Stall Prevention during Run. The
setting values of L3-05 and L3-06 [Stall Prevent Level during Run] do not have an
effect.
• The setting range changes when the A1-02 [Control Method Selection] value
changes:
–A1-02 = 0, 5[V/f, OLV/PM] : 0 to 2
–A1-02 =8[EZOLV] : 0, 3
0 : No
1 : Deceleration Time 1 (C1-02)
2 : Deceleration Time 2 (C1-04)
3 : Intelligent (Ignore Decel Ramp)
Determined by A1-02
(0 - Determined by A1-
02)
711
L3-06
(0494)
Stall Prevent Level
during Run
Sets the output current level at which the Stall Prevention function is enabled during run
when the drive rated output current is 100%.
Note:
• This parameter is applicable when L3-05 = 1, 2 [Stall Prevention during RUN =
Deceleration Time 1 (C1-02), Deceleration Time 2 (C1-04)].
• 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]
Determined by C6-01
(5 - 150%)
712
L3-11
(04C7)
Overvoltage Suppression
Select
Sets the overvoltage suppression function.
0 : Disabled
1 : Enabled
0
(0, 1)
712
L3-17
(0462)
DC Bus Regulation
Level
Sets the target value for the DC bus voltage when the overvoltage suppression function
and the Decel Stall Prevention function (Intelligent Stall Prevention) are active.
200 V Class: 375 V,
400 V Class: 750 V
(200 V Class: 150 to 400
V, 400 V Class: 300 to
800 V)
713
L3-20
(0465)
Expert
DC Bus Voltage
Adjustment Gain
Sets the proportional gain used to control the DC bus voltage.
Determined by A1-02
(0.00 - 5.00)
713
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