1.11 L: Protection Functions
84 YASKAWA TOEPYAIGA5002A GA500 DRIVE PROGRAMMING
No.
(Hex.)
Name Description
Default
(Range)
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%)
L3-11
(04C7)
Overvoltage Suppression
Select
Sets the overvoltage suppression function.
0 : Disabled
1 : Enabled
0
(0, 1)
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)
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)
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)
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)
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)
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)
L3-25
(046F)
Expert
Load Inertia Ratio
Sets the ratio between motor inertia and machine inertia.
1.0
(0.1 - 1000.0)
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)
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)
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)
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)
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)
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)
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)
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