Hitachi SJ Series, User Manual

Page: 338 / 786

12-14-11
Chapter 12 Inverter Function
12.14.7 Starting after free-run stop
• How to start operation matched with frequency
because the motor is idling when the free-run stop
terminal is turned off.
• How to start operation with 0 Hz because the brake
is applied at stopping although free-run stop has
been specified for stopping
• Set the start mode after free-run stop command is
input via the [FRS] terminal (input terminal function
032), (Ex.1) to (Ex. 4), or start mode after stop
when FRS (free run to stop) is specified for [AA115]
Stop mode selection, (Ex. 5) and (Ex. 6).
• (Ex. 1) to (Ex. 4) below are examples where a
free-run stop command is input using the [FRS]
terminal.
(Ex. 1) Restart with 0 Hz: [bb-40]=00
(Ex. 3) Restart with 0 Hz: [bb-40]=00
• The restart after reset, which occurs when the
inverter recovers from a reset, is the same as the
mode at power-on.
• 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.
• At power-on, the inverter will start operation with 0
Hz.
• In case of the 0 Hz restart, there is no wait time.
(Ex. 2) Frequency pull-in [bb-40]=01 to 03
(Ex. 4) Frequency pull-in [bb-40]=01 to 02
Q
A
!
Restart with 0 Hz
Operation
command
Motor speed
[FRS]
terminal
Free-running
Follows [bb-41]
[bb-26]
Motor speed
Operation
command
[FRS] terminal
Restart with 0 Hz
Operation
command
Motor speed
[FRS]
terminal
Free-running
Follows [bb-40]
[bb-26]
Motor speed
Operation
command
[FRS]
terminal