1.11 L: Protection Functions
70 YASKAWA TOEPYAIGA5002A GA500 Programming
No.
(Hex.)
Name Description
Default
(Range)
Ref.
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%)
379
L3-11
(04C7)
Overvoltage Suppression
Select
Sets the overvoltage suppression function.
0 : Disabled
1 : Enabled
0
(0, 1)
380
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: 750 V
(200 V Class: 150 to 400
V, 400 V Class: 300 to
800 V)
380
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)
380
L3-21
(0466)
Expert
OVSuppression Accel/
Decel P Gain
Sets the proportional gain to calculate acceleration and deceleration rates.
Determined by A1-02
(0.10 - 10.00)
381
L3-22
(04F9)
PM Stall Prevention
Decel Time
Sets the momentary deceleration time that the drive will use when it tries to accelerate a
PM motor and detected motor stalls. This function is applicable when L3-01 = 1 [Stall
Prevent Select duringAccel = General Purpose].
0.0 s
(0.0 - 6000.0 s)
381
L3-23
(04FD)
Stall P Reduction at
Constant HP
Sets the function to automatically decrease the Stall Prevention Level during Run for
constant output ranges.
0 : Use L3-06 for Entire Speed Range
1 : Automatic Reduction @ CHP Region
0
(0, 1)
381
L3-24
(046E)
Expert
Motor Accel Time @
Rated Torque
Sets the motor acceleration time to reach the maximum frequency at the motor rated torque
for stopped single-drive motors.
Determined by o2-04,
C6-01, E2-11, and E5-01
(0.001 - 10.000 s)
381
L3-25
(046F)
Expert
Load Inertia Ratio
Sets the ratio between motor inertia and machine inertia.
1.0
(0.1 - 1000.0)
382
L3-26
(0455)
Expert
Additional DC Bus
Capacitors
Sets the capacity for external main circuit capacitors. Usually it is not necessary to change
this setting. Sets this parameter when you use the KEB Ride-Thru function.
0 μF
(0 to 65000 μF)
382
L3-27
(0456)
Stall Prevention
Detection Time
Sets a delay time between reaching the Stall Prevention level and starting the Stall
Prevention function.
60 ms
(0 - 5000 ms)
382
L3-34
(016F)
Expert
Torque Limit Delay Time
Sets the filter time constant that returns the torque limit to its initial value when KEB
operation operates in Single Drive KEB Ride-Thru mode.
Determined by A1-02
(0.000 - 1.000 s)
382
L3-35
(0747)
Expert
Speed Agree Width for
Auto Decel
Sets the width for speed agreement when L3-04 = 2 [Decel Stall Prevention Selection =
Automatic Decel Reduction]. Usually it is not necessary to change this setting.
0.00 Hz
(0.00 - 1.00 Hz)
383
L3-36
(11D0)
Current Suppression
Gain@Accel
Sets the gain to suppress current and motor speed hunting during operation when L3-01 =
3 [Stall Prevention during Accel = Current Limit Method]. Usually it is not necessary to
change this setting.
Determined by A1-02
(0.0 - 100.0)
383
L3-37
(11D1)
Expert
Current Limit P Gain @
Accel
Suppresses current hunting during acceleration. Usually it is not necessary to change this
setting.
5 ms
(0 - 100 ms)
383
L3-38
(11D2)
Expert
Current Limit I Time @
Accel
Suppresses current hunting and overshooting that occurs when the drive stalls during
acceleration. Usually it is not necessary to change this setting.
10.0
(0.0 - 100.0)
383
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