Chapter 5 Parameters
|
VFD-B Series
Revision July 2008, BE16, SW V4.08 & V5.00
5-81
This parameter is used for starting and stopping a motor with high inertia. A motor with high
inertia will take a long time to stop completely. By setting this parameter, the user does not
need to wait for the motor to come to a complete stop before restarting the AC motor drive. If a
PG card and encoder is used on the drive and motor, then the speed search will start from the
speed that is detected by the encoder and accelerate quickly to the commanded frequency.
Pr.08-04 and Pr.08-06 will be disabled when using this parameter with PG feedback control.
CAUTION!
Please make sure Pr.07-04, Pr.10-10, and Pr.10-11 are set correctly. An incorrect setting may cause
the motor to exceed its speed limit and permanent damage to the motor and machine can occur.
08 - 20
Speed Search Frequency during Start-up
Factory Setting: 00
Settings
00
Setting
Frequency
01
Maximum Operation Frequency (01-00)
This parameter determines the start value of the speed search frequency.
08 - 22
Compensation Coefficient for Motor Instability
Unit: 1
Settings
00~1000
Factory Setting: 00
The drift current will occur in a specific zone of the motor and instability in the. By using this
parameter, greatly improves motor instability.
The drift current zone of the larger horsepower motor is usually in the low frequency range.
A setting of more than 500 is recommended.
