Parameter List
11
11.11 L: Protection Functions
YASKAWA SIEPC71061737D GA800 Drive Technical Reference 617
No.
(Hex.)
Name Description
Default
(Range)
Ref.
L3-06
(0494)
Stall Prevent Level during
Run
Sets the output current level to enable the Stall Prevention function during operation as a
percentage of the drive rated output current.
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 of the setting range changes when C6-01 [Normal / Heavy Duty
Selection] changes.
–150% when C6-01 = 0 [Heavy Duty Rating 1 (HD1) for Constant Torque
Applications].
–110% when C6-01 = 1 [Normal Duty Rating 1 (ND1) for Variable Torque
Applications].
Determined by C6-01 and
L8-38
(5 - 150%)
980
L3-11
(04C7)
Overvoltage Suppression
Select
Sets the overvoltage suppression function.
0 : Disabled
1 : Enabled
0
(0, 1)
981
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)
981
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)
981
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)
981
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
Prevention during Accel = Enabled].
0.0 s
(0.0 - 6000.0 s)
982
L3-23
(04FD)
Stall P Reduction at
Constant HP
Sets the function to automatically decrease the Stall Prevention Level during Run for
Constant Horse Power (CHP) part of the speed range.
0 : Use L3-06 for Entire Speed Range
1 : Automatic Reduction @ CHP Region
0
(0, 1)
982
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)
982
L3-25
(046F)
Expert
Load Inertia Ratio
Sets the ratio between motor inertia and machine inertia.
1.0
(0.1 - 1000.0)
983
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)
983
L3-27
(0456)
Stall Prevention
Detection Time
Sets a delay time between reaching the Stall Prevention level and starting the Stall
Prevention function.
50 ms
(0 - 5000 ms)
983
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)
984
L3-35
(0747)
Expert
Speed Agree Width for
Auto Decel
Sets the width for speed agreement when L3-04 = 2 [Stall Prevention during Decel =
Intelligent (Ignore Decel Ramp)]. Usually it is not necessary to change this setting.
0.00 Hz
(0.00 - 1.00 Hz)
984
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)
984
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)
984
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