Hitachi SJ Series User Manual page 336

Chapter 12
12.14.5 Starting after power-on
Q
• How to start operation matched with frequency
because the motor is idling at power-on
• How to start operation with 0 Hz because the brake
is applied at starting
A
• Sets the start mode at power-on.
(Ex. 1) Restart operation with 0 Hz: [bb-41]=00
Input power
Operation
command
Motor speed
Parameter
Item
Restart after reset
Retry wait time after instantaneous
power failure/under-voltage
* 1) See "12.14.3 Starting by picking up frequency".
Restart with 0 Hz
Parameter Data
00
[bb-41] 01
02
0.3~100.0(s)
[bb-26]
12-14-9
!
• The operation at power-on is the same as that of
the restart after reset stop which occurs when the
inverter recovers from reset.
• If the frequency pull-in restart is used, the rotational
direction of the output frequency is the same as
that of the frequency command.
• If a power failure lasts long and the inverter's
internal power supply is lost, recovery will take
place by the restart after reset instead of the restart
after instantaneous power failure/under-voltage.
• In the case of [bb-41]=01, if the residual voltage
generated by the motor cannot be detected, the 0
Hz restart may take place.
(Ex. 2) Frequency pull-in operation [bb-41]=01 to 03
Input power
Operation
command
Motor speed
Description
Performs the 0 Hz restart.
Performs frequency matching restart.* 1)
Performs frequency pull-in restart.* 2)
Sets the wait time after the operation
command.
*2) See "12.14.4 Starting with frequency pull-in".
Inverter Function
Free-running
[bb-26]
Follows [bb-41]