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b3: Speed Search

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-01

(0191)

Speed Search at Start Selection

Sets the Speed Search at Start function so the drive will do Speed Search with each Run command.

0
Disable

Enter a Run command to start to operate the drive at the minimum output frequency.

When the Run command is enabled and the Speed Search from Fmax or Fref [H1-xx = 61, 62] is input from a multi-function input terminal, the drive will do Speed Search and start to operate the motor.

1
Enabled

Enter the Run command to do Speed Search. The drive completes Speed Search then starts to operate the motor.

Determined by A1-02

(0, 1)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-02

(0192)

SpeedSearch Deactivation Current

Sets the current level that stops Speed Search as a percentage of the drive rated output current. Usually it is not necessary to change this setting.

Determined by A1-02

(0 - 200%)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-03

(0193)

Speed Search Deceleration Time

Sets the deceleration time during Speed Search operation. Set the length of time to decelerate from the maximum output frequency to the minimum output frequency.

Note:

When A1-02 = 8 [Control Method Selection = EZOLV], this parameter takes effect only in Expert Mode.

2.0 s

(0.1 - 10.0 s)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-04

(0194)

V/f Gain during Speed Search

Sets the ratio used to reduce the V/f during searches to reduce the output current during speed searches.

Determined by o2-04

(10 - 100)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-05

(0195)

Speed Search Delay Time

Sets the Speed Search delay time to activate a magnetic contactor installed between the drive and motor.

0.2 s

(0.0 - 100.0 s)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-06

(0196)

Expert

Speed Estimation Current Level 1

Sets the level of current that flows to the motor during Speed Estimation Speed Search as a coefficient of the motor rated current. Usually it is not necessary to change this setting.

Determined by o2-04

(0.0 - 2.0)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-07

(0197)

Expert

Speed Estimation Current Level 2

Sets the level of current that flows to the motor during Speed Estimation Speed Search as a coefficient of E2-03 [Motor No-Load Current] or E4-03 [Motor 2 Rated No-Load Current]. Usually it is not necessary to change this setting.

1.0

(0.0 - 3.0)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-08

(0198)

Expert

Speed Estimation ACR P Gain

Sets the proportional gain for the automatic current regulator during Speed Estimation Speed Search. Also adjusts speed search responsiveness. Usually it is not necessary to change this setting.

Determined by A1-02 and o2-04

(0.00 - 6.00)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-09

(0199)

Expert

Speed Estimation ACR I Time

Sets the integral time for the automatic current regulator during Speed Estimation Speed Search. Also adjusts speed search responsiveness. Usually it is not necessary to change this setting.

Determined by A1-02

(0.0 - 1000.0 ms)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-10

(019A)

Expert

Speed Estimation Detection Gain

Sets the gain to correct estimated frequencies from Speed Estimation Speed Search.

1.05

(1.00 - 1.20)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-14

(019E)

Bi-directional Speed Search

Sets the direction of Speed Search to the direction of the frequency reference or in the motor rotation direction as detected by the drive.

0
Disable

The drive uses the frequency reference to detect the direction of motor rotation.

1
Enabled

The drive detects the direction of motor rotation during Speed Search.

Note:

  • The initial value of b3-14 is different for different A1-02 [Control Method Selection] settings when you set these parameters:

    • A1-02 = 0, 2, 8 [V/f, OLV, EZOLV]

    • E9-01 = 0 [Motor Type Selection = Induction (IM)]

    • b3-24 = 1 [Speed Search Method Selection = Speed Estimation].

  • The initial value of b3-14 is different for different A1-02 [Control Method Selection] settings when you set these parameters:

    • A1-02 = 1, 4, 8 [CL-V/f, AOLV, EZOLV]

    • E9-01 = 1, 2 [Permanent Magnet (PM), Synchronous Reluctance (SynRM)]

  • The initial value of b3-14 is 0 when you set these parameters:

    • A1-02 = 0, 2, 8

    • E9-01 = 0

    • b3-24 = 2 [Current Detection 2]

  • When you set A1-02, b3-24, and E9-01, set b3-14.

Determined by A1-02, b3-24, and E9-01

(0, 1)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-17

(01F0)

Expert

Speed Est Retry Current Level

Sets the current level for the search retry function in Speed Estimation Speed Search as a percentage where drive rated current is a setting value of 100%.

150%

(0 - 200%)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-18

(01F1)

Expert

Speed Est Retry Detection Time

Sets the length of time that the drive will wait to retry Speed Estimation Speed Search when too much current flow stopped the Speed Search.

0.10 s

(0.00 - 1.00 s)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-19

(01F2)

Speed Search Restart Attempts

Sets the number of times to restart Speed Search if Speed Search does not complete.

3 times

(0 - 10 times)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-24

(01C0)

Speed Search Method Selection

Sets the Speed Search method when you start the motor or when you restore power after a momentary power loss.

Note:

  • When A1-02 = 8 [Control Method Selection = EZOLV], the default setting changes when the setting for E9-01 [Motor Type Selection] and the drive model change.

    • E9-01 = 0 [Induction (IM)]

      • 2004 - 2313, 4002 - 4296: 1

      • 2360, 2415, 4371 - 4H12: 2

    • E9-01 = 1, 2 [Permanent Magnet (PM), Synchronous Reluctance (SynRM)]: 1

  • When you set A1-02 = 8 and E9-01 = 1 or 2, also set b3-24 = 1. If b3-24 = 2, the drive will detect oPE08 [Parameter Selection Error].

  • When you set b3-24, it will trigger the drive to initialize b3-14 [Bi-directional Speed Search]. After you set b3-24, set b3-14.

  • When A1-02 = 4 [AOLV], the default setting is 1 [Speed Estimation].

1
Speed Estimation

The drive uses the residual voltage from a short baseblock time to estimate the motor speed.

If there is not sufficient residual voltage, then the drive will inject DC current into the motor to estimate the motor speed.

2
Current Detection 2

The drive will inject DC current into the motor to estimate motor speed.

Determined by A1-02

(1, 2)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-25

(01C8)

Expert

Speed Search Wait Time

Sets the length of time the drive will wait to start the Speed Search Retry function.

0.5 s

(0.0 - 30.0 s)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-26

(01C7)

Expert

Direction Determination Level

Sets the level to find the motor rotation direction. Increase the value if the drive cannot find the direction.

1000

(40 to 60000)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-27

(01C9)

Expert

Speed Search RUN/BB Priority

Sets the conditions necessary to start Speed Search.

0
SS Only if RUN Applied Before BB
 
1
SS Regardless of RUN/BB Sequence
 

0

(0, 1)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-29

(077C)

Expert

Speed Search Back-EMF Threshold

Sets the induced voltage for motors that use Speed Search. The drive will start Speed Search when the motor induced voltage level is the same as the setting value. Usually it is not necessary to change this setting.

10%

(0 - 10%)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-31

(0BC0)

Expert

Spd Search Current Reference Lvl

Sets the current level that decreases the output current during Current Detection Speed Search.

1.50

(1.50 - 3.50)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-32

(0BC1)

Expert

Spd Search Current Complete Lvl

Sets the current level that completes Speed Search.

1.20

(0.00 - 1.49)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-33

(0B3F)

Expert

Speed Search during Uv Selection

Sets the function that starts Speed Search at start-up if the drive detects a Uv [Undervoltage] when it receives a Run command.

0
Disabled
 
1
Enabled
 

1

(0, 1)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-35

(0BC3)

Expert

Low Back EMF Detection Level

Sets the Low Back EMF Detection Level. Usually it is not necessary to change this setting.

10%

(5 - 50%)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-36

(0BC4)

Expert

High Back EMF Detection Level

Sets the voltage level for Speed Search restart. Usually it is not necessary to change this setting.

0.970

(0.500 - 1.000)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-39

(1B8F)

Expert

Regen Judgment Lv of Spd Search

Sets the level to determine the regenerative state during speed search. Usually it is not necessary to change this setting.

15%

(0 - 50%)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-54

(3123)

Search Time

Sets the length of time that the drive will run Speed Search.

400 ms

(10 - 2000 ms)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-55

(3124)

Expert

Current Increment Time

Sets the length of time that the drive will increase the current from zero current to the setting value of b3-06 [Speed Estimation Current Level 1].

10 ms

(10 - 2000 ms)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-56

(3126)

InverseRotationSearch WaitTime

Sets the wait time until the drive starts inverse rotation search after it completes forward search when you do inverse rotation search during Current Detection Speed Search.

Determined by o2-04

(0.1 - 5.0 s)

Details

No.

(Hex.)

Name

Description

Default

(Range)

Ref.

b3-61

(1B96)

Expert

Init Magnet Pole Estimation Gain

Sets the responsiveness for initial motor magnetic pole calculation when A1-02 = 6 [Control Method Selection = AOLV/PM]. Set b3-61 > 0.0 for an ordinary IPM motor.

When you use High Frequency Injection Auto-Tuning, the drive will automatically set this value.

Note:

  • Set n8-35 = 1 [Initial Pole Calculation Method = High Frequency Injection] to enable this parameter.

  • When A1-02= 6 [AOLV/PM] and you do High Frequency Injection Auto-Tuning, the drive automatically sets this parameter .

  • Set n8-41 [HFI P Gain] to adjust the responsiveness for initial motor magnetic pole calculation when A1-02 = 5, 7 [OLV/PM, CLV/PM].

5.0

(-20.0 - +20.0)

Details