Basic operation procedure (External operation)
Select a method to give the frequency command from the list below, and refer to the specified page for its procedure.
Method to give the frequency command
Setting the frequency on the operation panel in the frequency setting mode
Turning ON/OFF switches wired to inverter's terminals (multi-speed setting)
Setting the frequency by inputting voltage signals
Setting the frequency by inputting current signals
Setting the frequency on the operation panel
• Turn ON the STF/STR signal to give a start command.
on the operation panel (FR-DU08) to give a frequency command.
• Set Pr.79 = "3" (External/PU combined operation mode 1).
The following shows the procedure to operate at 30 Hz.
Changing the operation mode
Set "3" in Pr.79. [PU] and [EXT] indicators are ON. (To change the setting, refer to
Setting the frequency
until the target frequency "
While the indication is flashing, press
displayed alternately. After about three seconds of alternate display, the monitor display goes back to "
indication of a monitored value). (If
display goes back to "
Start → acceleration → constant speed
Turn ON the start switch (STF/STR signal). The frequency value on the monitor increases according to the setting
of Pr.7 Acceleration time, and "
forward rotation, and [REV] indicator is ON during the reverse rotation. (To change the set frequency, return to step
2. The previously set frequency appears.)
Deceleration → stop
Turn OFF the start switch (STF/STR signal). The frequency value on the monitor decreases according to the setting
of Pr.8 Deceleration time, the monitor displays "
" (30.00 Hz) appears. The indication blinks for about five seconds.
to confirm the selection for the frequency. " " and "
is not pressed during the flashing for about five seconds, the monitor
" (0.00 Hz). In that case, turn
" (30.00 Hz) appears on the monitor. [FWD] indicator is ON during the
Refer to page
again and set the frequency.)
" (0.00 Hz), and the motor stops rotating.
4.6 Basic operation procedure (External operation)
4. BASIC OPERATION