Yaskawa F7 Drive User Manual Bedienungsanleitung PDF herunterladen (Seite 196)

Parameters A - 31

L2-08

Frequency Reduction Gain at

KEB Start

KEB Frequency

Sets the percentage of output frequency reduction at the beginning

of deceleration when a KEB command is input from multi-function

input.

Reduction = slip frequency before KEB operation × L2-08 × 2

0 to 300 100% A A A A

Stall Prevention

L3-01

Stall Prevention Selection

During Accel

StallP Accel Sel

Selects the stall prevention method used to prevent excessive

current during acceleration.

0: Disabled - Motor accelerates at active acceleration rate. The

motor may stall if load is too heavy or accel time is too short.

1: General Purpose - When output current exceeds L3-02 level,

acceleration stops. Acceleration will continue when the output

current level falls below the L3-02 level.

2: Intelligent - The active acceleration rate is ignored. Acceleration

is completed in the shortest amount of time without exceeding

the current value set in L3-02.

0 to 2 1 A A A -

L3-02

Stall Prevention Level

During Acceleration

StallP Accel Lvl

This function is enabled when L3-01 is “1” or “2”.

Drive rated current is 100%. Decrease the set value if stalling or

excessive current occurs with factory setting.

0 to 200

Va ri es

Duty

Rating*

AA A -

L3-03

Stall Prevention Limit During

Acceleration

StallP CHP Lvl

Sets the lower limit for stall prevention during acceleration, as a

percentage of the Drive’s rated current, when operation is in the fre-

quency range above E1-06 (constant power region).

0 to 100 50% A A A -

L3-04

Stall Prevention Selection

During Deceleration

StallP Decel Sel

When using a braking resistor, use setting “0”. Setting “3” is used in

specific applications.

0: Disabled - The Drive decelerates at the active deceleration rate. If

the load is too large or the deceleration time is too short, an OV

fault may occur.

1: General Purpose - The Drive decelerates at the active

deceleration rate, but if the main circuit DC bus voltage reaches

the stall prevention level (380/760Vdc), deceleration will stop.

Deceleration will continue once the DC bus level drops below the

stall prevention level.

2: Intelligent - The active deceleration rate is ignored and the Drive

decelerates as fast as possible w/o hitting OV fault level.

Range: C1-02 / 10.

3: Stall Prevention w/ Braking Resistor - Stall prevention during

deceleration is enabled in coordination with dynamic braking.

(Not available in Flux Vector)

0 to 3 1 Q Q Q Q

L3-05

Stall Prevention Selection

During Running

StallP Run Sel

Selects the stall prevention method to use to prevent Drive faults

during run.

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

the Drive to trip on an OC or OL fault.

1: Decel Time 1 - In order to avoid stalling during heavy loading,

the Drive will decelerate at Decel time 1 (C1-02) if the output

current exceeds the level set by L3-06. Once the current level

drops below the L3-06 level, the Drive will accelerate back to its

frequency reference at the active acceleration rate.

2: Decel Time 2 - Same as setting 1 except the Drive decelerates at

Decel Time 2 (C1-04).

When output frequency is 6Hz or less, stall prevention during

running is disabled regardless of L3-05 setting.

0 to 2 1 A A - -

L3-06

Stall Prevention Level

During Running

StallP Run Level

This parameter is enabled when L3-05 is set to “1” or “2”.

Drive rated current is set as 100%.

Decrease the set value if stalling or excessive current occurs with

factory setting.

30 to 200

Va ri es

Duty

Rating*

AA - -

L3-11

OV Suppression Function

Selection

OV Inhibit Sel

Enables or disables OV suppression function, which allows the

Drive to change the output frequency as the load changes, to

prevent OV fault.

0: Disabled

1: Enabled

0 to 1 0 - - A A

L3-12

OV Suppression Function

Voltage Level

OV Inhbt VoltLvl

Sets the DC bus voltage level at which the OV suppression

function is active.

350 to

390

(240V)

700 to

780

(480V)

380V

760V

-- A A

Denotes that parameter can be changed when the Drive is running.

* For Heavy Duty (HD) Rating: Factory Setting=150%.

For Normal Duty (ND) Rating: Factory Setting=120%. The setting value will change automatically if the carrier frequency is set larger than the default setting.

Table A.1 F7 Parameter List (Continued)

Parameter

No.

Parameter Name

Digital Operator Display

Description

Setting

Range

Factory

Setting

Control Method

V/F

w/PG

Open

Loop

Vector

Flux

Vector

1 2 ... 191 192 193 194 195 196 197 198 199 200 201 ... 254 255

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