Chapter 4
Explanation of Functions
4-55
(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.
RS
Alarm
RS
Alarm
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".
Free running
FW
Motor speed
Starting with matching
frequency
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"
Summary of Contents for SJ700D-004L
Page 16: ...Contents Appendix Appendix A 1 Index Index Index 1 ...
Page 44: ...Chapter 2 Installation and Wiring 2 23 Memo ...
Page 70: ...Chapter 3 Operation 3 25 Memo ...
Page 248: ...Chapter 5 Error Codes 5 11 Memo ...
Page 256: ...Chapter6 Maintenance and Inspection 6 7 Memo ...