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Yaskawa AC Drive Z1000 AC Drive HVAC Fan User Manual

Page 35

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b3-06: Output Current 1 during Speed Search

Sets the current injected to the motor at the beginning of Speed Estimation Speed Search as a factor of the motor rated current

set in E2-01. If the motor speed is relatively slow when the drive starts to perform Speed Search after a long period of baseblock,

it may be helpful to increase the setting value. The output current during Speed Search is automatically limited by the drive

rated current.

No.

Name

Setting Range

Default

b3-06

Output Current 1 during Speed Search

0.0 to 2.0

Determined by

o2-04

Note:

Use Current Detection Speed Search if Speed Estimation is not working correctly even after adjusting b3-06.

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b3-08: Current Control Gain during Speed Search (Speed Estimation Type)

Sets the proportional gain for the current controller during Speed Search.

No.

Name

Setting Range

Default

b3-08

Current Control Gain during Speed Search (Speed Estimation Type)

0.00 to 6.00

Determined by

A1-02 and o2-04

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b3-10: Speed Search Detection Compensation Gain

Sets the gain for the detected motor speed of the Speed Estimation Speed Search. Increase the setting only if an overvoltage

fault occurs when the drive restarts the motor.

No.

Name

Setting Range

Default

b3-10

Speed Search Detection Compensation Gain

1.00 to 1.20

1.05

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b3-14: Bi-Directional Speed Search Selection

Sets how the drive determines the motor rotation direction when performing Speed Estimation Speed Search.

No.

Parameter Name

Setting Range

Default

b3-14

Bi-Directional Speed Search Selection

0, 1

1

Setting 0: Disabled

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

Setting 1: Enabled

The drive detects the motor rotation direction to restart the motor.

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b3-17: Speed Search Restart Current Level

Sets the current level at which Speed Estimation is restarted as a percentage of drive rated current to avoid overcurrent and

overvoltage problems since a large current can flow into the drive if the difference between the estimated frequency and the

actual motor speed is too big when performing Speed Estimation.

No.

Name

Setting Range

Default

b3-17

Speed Search Restart Current Level

0 to 200%

150%

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b3-18: Speed Search Restart Detection Time

Sets the time for which the current must be above the level set in b3-17 before restarting Speed Search.

No.

Name

Setting Range

Default

b3-18

Speed Search Restart Detection Time

0.00 to 1.00 s

0.10 s

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b3-19: Number of Speed Search Restarts

Sets the number of times the drive should attempt to find the speed and restart the motor. If the number of restart attempts

exceeds the value set to b3-19, the SEr fault will occur and the drive will stop.

1.2 b: Application

YASKAWA ELECTRIC SIEP YAIZ1U 03A YASKAWA AC Drive – Z1000 Programming Manual

35

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Parameter Details