L3: stall prevention – Yaskawa AC Drive Z1000 User Manual

Page 311

L3: Stall Prevention

No.

(Addr.

Hex)

Name

LCD Display

Description

Values

Page

L3-01

(48F)

Stall Prevention

Selection during

Acceleration

StallP Accel Sel

0: Disabled

1: General purpose

2: Intelligent

0: Disabled.

1: General purpose. Acceleration is paused as long as the

current is above the L3-02 setting.

2: Intelligent. Accelerate in the shortest possible time without

exceeding the L3-02 level.

Note:

Setting 2 is not available when using OLV/PM.

Default: 1

Range: 0 to 2

–

L3-02

(490)

Stall Prevention Level

during Acceleration

StallP Accel Lvl

Used when L3-01 = 1 or 2. 100% is equal to the drive rated

current.

Default:

<1>

Min.: 0%
Max.: 150%

<1>

–

L3-03

(491)

Stall Prevention Limit

during Acceleration

StallPAcc LowLim

Sets Stall Prevention lower limit during acceleration when

operating in the constant power range. Set as a percentage of

drive rated current.

Default: 50%

Min.: 0

Max.: 100

–

L3-04

(492)

Stall Prevention

Selection during

Deceleration

StallP Decel Sel

0: Disabled

1: General purpose

2: Intelligent

4: High Flux Brake

5: High Flux Brake2

0: Disabled. Deceleration at the active deceleration rate. An ov

fault may occur.

1: General purpose. Deceleration is paused when the DC bus

voltage exceeds the Stall Prevention level.

2: Intelligent. Decelerate as fast as possible while avoiding ov

faults.

4: Overexcitation Deceleration. Decelerates while increasing

the motor flux

5: Overexcitation Deceleration 2. Adjust the deceleration rate

according to the DC bus voltage.

Default: 1

Range: 0 to 2; 4,
5

<2>

–

L3-05

(493)

Stall Prevention

Selection during Run

StallP Run Sel

0: Disabled

1: Decel time

2: Decel time 2

0: Disabled. Drive runs at a set frequency. A heavy load may

cause speed loss.

1: Decel time 1. Uses the deceleration time set to C1-02 while

Stall Prevention is performed.

2: Decel time 2. Uses the deceleration time set to C1-04 while

Stall Prevention is performed.

Default: 1

Range: 0 to 2

–

L3-06

(494)

Stall Prevention Level

during Run

StallP Run Level

Enabled when L3-05 is set to 1 or 2. 100% is equal to the drive

rated current.

Default:

<1>

Min.: 30%
Max.: 150%

<1>

–

L3-11

(4C7)

Overvoltage

Suppression Function

Selection

OV Inhibit Sel

0: Disabled

1: Enabled

Enables or disables the ov suppression function, which allows

the drive to change the output frequency as the load changes to

prevent an ov fault.

0: Disabled

1: Enabled

Default: 0

Range: 0, 1

–

L3-17

(462)

Target DC Bus Voltage

for Overvoltage

Suppression and Stall

Prevention

DC Bus Reg Level

Sets the desired value for the DC bus voltage during overvoltage

suppression and Stall Prevention during deceleration.

Default: 370 Vdc

<3> <4>

Min.: 150
Max.: 400

<4>

–

L3-20

(465)

DC Bus Voltage

Adjustment Gain

DC Bus P Gain

Determines the proportional gain used by overvoltage

suppression (L3-11 = 1), Single drive KEB 2 (L2-29 = 1), KEB

Ride-Thru 2 (H1-oo = 7A or 7B), and Intelligent Stall

Prevention during Deceleration (L3-04 = 2) to control the DC

bus voltage in OLV/PM.

Default:

<5>

Min.: 0.00

Max.: 5.00

–

L3-21

(466)

Accel/Decel Rate

Calculation Gain

Acc/Dec P Gain

Sets the proportional gain used to calculate the deceleration rate

during KEB Ride-Thru, ov suppression function, and Stall

Prevention during deceleration (L3-04 = 2).

Default:

<5>

Min.: 0.00

Max.: 200.00

–

L3-22

(4F9)

Deceleration Time at

Stall Prevention during

Acceleration

PM Acc Stall P T

Sets the deceleration time used for Stall Prevention during

acceleration in OLV/PM.

Default: 0.0 s

Min.: 0.0

Max.: 6000

–

L3-23

(4FD)

Automatic Reduction

Selection for Stall

Prevention during Run

CHP Stall P Sel

0: Lv1 set in L3-06

1: Autom. Reduction

0: Sets the Stall Prevention level set in L3-04 that is used

throughout the entire frequency range.

1: Automatic Stall Prevention level reduction in the constant

output range. The lower limit value is 40% of L3-06.

Default: 0

Range: 0, 1

–

L3-24

(46E)

Motor Acceleration

Time for Inertia

Calculations

Mtr Accel Time

OLV/PM

Sets the time needed to accelerate the uncoupled motor at rated

torque from stop to the maximum frequency.

Default:

<6> <7>

Min: 0.001 s

Max: 10.000 s

–

L3-25

(46F)

Load Inertia Ratio

Load Inertia Rat

OLV/PM

Sets the ratio between the motor and machine inertia.

Default: 1.0

Min.: 1.0

Max.: 1000.0

–

B.8 L: Protection Function

YASKAWA ELECTRIC TOEP C710616 45E YASKAWA AC Drive – Z1000 User Manual

311

Parameter List