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3.11 L: Protection Functions

228

YASKAWA

TOEPYAIGA8001B GA800 Drive Maintenance & Troubleshooting

No.

(Hex.)

Name

Description

Default

(Range)

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%)

L3-11

(04C7)

Overvoltage Suppression
Select

Sets the overvoltage suppression function.

0 : Disabled

1 : Enabled

(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 Horse
Power (CHP) part of the speed range.

0 : Disabled

1 : Enabled

(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.

50 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)

V/f

CL-V/f

OLV

CLV

AOLV

OLV/PM

OLV/PM AOLV/PM CLV/PM

EZOLV

V/f

CL-V/f