Hitachi SJ700-2 - Manual (Page 118)

Chapter 4 Explanation of Functions
(Example 1) (Example 2)
RS
Alarm
RS
Alarm
(Example 3)If you select "01" (starting with matching frequency) as the restart mode after reset (C103),
you can also make the inverter start the motor with matching frequency after the power reset. When "00"
(starting with 0 Hz) is selected as the restart mode after reset (C103), the setting of the retry wait time
before motor restart (b003) is ignored. Note that, even when restarting with matching frequency has been
selected, the inverter may start the motor with 0 Hz if:
1) the output frequency is no more than half the base frequency or
2) the voltage induced on the motor is attenuated quickly.
3) the restart frequency threshold (b007) is set and the detected frequency is lower than that.
4 -
55
Note: The reset operation clears the inverter's internal counters that are used for protective functions.
Therefore, if you intend to use an intelligent input terminal to shut off the inverter output, use the
free-run stop (FRS) terminal.
(Example 4) Restarting with active matching frequency
Free running
FW
Motor speed
Starting with matching
frequency
After the retry wait time (b003), the
inverter restarts the motor with the
ncy set as "b030". The inverter
quently decelerates the motor
ing to the setting of "b029"
e maintaining the output current
at the level specified for "b029".
hen the output voltage matches
ncy, the inverter
re-accelerates the motor up to the
ncy that was set when the
ut off the output to the
motor before the restart.
If the inverter trips because of
ent when it restarts the
with input frequency, reduce
the setting of "b028".
freque
subse
accord
whil
W
the freque
freque
inverter sh
overcurr
motor
Inverter output
frequency
FW
RS
b003
b028
Motor speed
Occurrence of trip
Output current
Deceleration according to
the setting of "b029"
Frequency selected as the
setting of "b030"