Setting The Frequency By Switches (Multi-Speed Setting) (Pr. 4 To Pr. 6) - Mitsubishi Electric FR-A720-0.4K Instruction Manual

Start and stop using terminals (External
operation)
3.4.2

Setting the frequency by switches (multi-speed setting) (Pr. 4 to Pr. 6)

POINT
· Switch ON the STF (STR) signal to give a start command.
· Switch ON the RH, RM, or RL signal to give a frequency command. (Multi-speed setting)
[Connection diagram]
Forward rotation start
Reverse rotation start
High speed
Middle speed
Low speed
Switch
Changing example Operation at high speed (60Hz).
Screen at power-ON
1.
The monitor display appears.
Frequency setting
2.
Turn ON the high-speed switch (RH).
Start acceleration
Turn ON the start switch (STF or STR). The frequency on the indicator increases by the Pr. 7 Acceleration time, and
" " (60.00Hz) appears. [FWD] indicator is lit during forward rotation, and [REV] indicator is lit during reverse
3.
rotation.
When RM is turned ON, 30Hz is displayed.
When RL is turned ON, 10Hz is displayed.
Deceleration stop
Turn OFF the start switch (STF or STR). The frequency on the indicator decreases by the Pr. 8 Deceleration time, and the
4.
motor stops rotating with "
OFF the high-speed switch (RH).
CAUTION
When both of STF and STR signals are turned ON, the motor cannot start. If both are turned ON while the motor is running, the
motor decelerates to a stop.
REMARKS
· Initial value of terminal RH, RM, and RL are 60Hz, 30Hz, and 10Hz. (To change, set Pr. 4, Pr. 5, and Pr. 6.)
· In the initial setting, when two or more of multi-speed settings are simultaneously selected, priority is given to the set frequency
of the lower signal. For example, when RH and RM signals turn ON, RM signal (Pr. 5) has a higher priority.
· Maximum of 15-speed operation can be performed.
88
Inverter
STF
STR
RH
RM
RL
SD
Operation
constant speed
" (0.00Hz) displayed on the indicator. [FWD] indicator or [REV] indicator turns OFF. Turn
(Refer to
Speed 1
(High speed)
Speed 2
(Middle speed)
ON
RH
ON
RM
RL
the Instruction Manual (Applied).)
Chapter 4 of
Speed 3
(Low speed)
Time
ON