Hitachi L700 Series, Instruction Manual, Page: 118 / 263

Chapter 4 Explanation of Functions
4 - 56
(Example 1) (Example 2)
(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.
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
(note) Inverter starts from 0Hz when reset signal is given during retry waiting because the frequency
stored in inverter is cleared.
Free running
RS
Alarm
RS
Alarm
FW
Motor speed
Starting with matching
frequency
After the retry wait time (b003), the
inverter restarts the motor with the
frequency set as "b030". The inverter
subsequently decelerates the motor
according to the setting of "b029"
while maintaining the output current
at the level specified for "b029".
When the output voltage matches
the frequency, the inverter
re-accelerates the motor up to the
frequency that was set when the
inverter shut off the output to the
motor before the restart.
If the inverter trips because of
overcurrent when it restarts the
motor with input frequency, reduce
the setting of "b028".
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"