N: special adjustment, N1: hunting prevention, B.9 n: special adjustment – Yaskawa AC Drive-P1000 Industrial Fan User Manual

n1-02

(581)

Hunting Prevention Gain

Setting

If the motor vibrates while lightly loaded, increase the gain by 0.1 until

vibration ceases. If the motor stalls, decrease the gain by 0.1 until the stalling

ceases.

Default: 1.00

Min.: 0.00

Max.: 2.50

n1-03

(582)

Hunting Prevention Time

Constant

Sets the time constant used for Hunting Prevention.

Default:

<1>

Min.: 0 ms

Max.: 500 ms

n1-05

(530)

Hunting Prevention Gain

while in Reverse

Sets the gain used for Hunting Prevention. If set to 0, the gain set to n1-02 is

used for operation in reverse.

Default: 0.00

Min.: 0.00

Max.: 2.50

<1> Default setting is dependent on parameter o2-04, Drive Model Selection.

n3: High Slip Braking (HSB) and Overexcitation Braking

No.

(Addr.

Hex)

Name

Description

Values

Page

n3-01

(588)

High-Slip Braking

Deceleration Frequency

Width

Sets the output frequency reduction step width for when the drive stops the

motor using HSB. Set as a percentage of the maximum output frequency.

Increase this setting if overvoltage occurs during HSB.

Default: 5%

Min.: 1

Max.: 20

n3-02

(589)

High-Slip Braking Current

Limit

Sets the current limit during HSB as a percentage of the motor rated current. Default:

<1>

Min.: 100%

Max.: 200%

n3-03

(58A)

High-Slip Braking Dwell

Time at Stop

Sets the time the drive will run with minimum frequency (E1-09) at the end

of deceleration.

If this time is set too low, the machine inertia can cause the motor to rotate

slightly after HSB.

Default: 1.0 s

Min.: 0.0

Max.: 10.0

n3-04

(58B)

High-Slip Braking Overload

Time

Sets the time required for an HSB overload fault (oL7) to occur when the drive

output frequency does not change during an HSB stop. This parameter does

not typically require adjustment.

Default: 40 s

Min.: 30

Max.: 1200

n3-13

(531)

Overexcitation Deceleration

Gain

Sets the gain applied to the V/f pattern during Overexcitation Deceleration

(L3-04 = 4).

Default: 1.10

Min.: 1.00

Max.: 1.40

n3-14

(532)

High Frequency Injection

during Overexcitation

Deceleration

0: Disabled

1: Enabled

Default: 0

Range: 0, 1

n3-21

(579)

High-Slip Suppression

Current Level

Sets output current level at which the drive will start reducing the

overexcitation gain in order to prevent a too high motor slip during

Overexcitation Deceleration. Set as a percentage of the drive rated current.

Default: 100%

Min.: 0

Max.: 150

n3-23

(57B)

Overexcitation Operation

Selection

0: Enabled in both directions

1: Enabled only when rotating forward

2: Enabled only when in reverse

Default: 0

Range: 0 to 2