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4.5.3
Setting the frequency by switches (three-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.
· [EXT] must be lit. (When [PU] is lit, switch it to [EXT] with
· The initial values of the terminals RH, RM, and RL are 60Hz, 30Hz, and 10Hz. (Use Pr. 4, Pr. 5 and Pr. 6 to
change.)
· Operation at 7-speed can be performed by turning two (or three) terminals simultaneously. (Refer to Chapter 4 of
the Instruction Manual (Applied).)
[Connection diagram]
Forward rotation start
Reverse rotation start
High speed
Middle speed
Low speed
Changing example Operation at high speed (60Hz).
Operation
1. Screen at power-ON
The monitor display appears.
2. Start
Turn ON the high-speed switch (RH).
3. Acceleration → constant speed
Turn ON the start switch (STF or STR). The frequency on the
display increases in the Pr. 7 Acceleration time, and "
(60.00Hz) appears.
[FWD] indicator is lit during forward rotation, and [REV]
indicator is lit during reverse rotation.
•
When RM is turned ON, 30Hz is displayed. When RL is turned
ON, 10Hz is displayed.
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.
4. Deceleration
Turn OFF the start switch (STF or STR).
The frequency on the display decreases in the Pr. 8 Deceleration
time, and the motor stops rotating with "
displayed.
[FWD] indicator or [REV] indicator turns OFF.
5. Stop
Turn OFF the high-speed switch (RH).
.)
Inverter
STF
STR
RH
RM
RL
SD
ON
High speed
Middle speed
ON
Forward
rotation Reverse
"
ON
Forward
rotation Reverse
" (0.00Hz)
OFF
High speed
Middle speed
OFF
Start/stop using terminals (External
Speed 1
(High speed)
Speed 2
(Middle speed)
Speed 3
(Low speed)
ON
RH
ON
RM
ON
RL
Low speed
rotation
rotation
Low speed
operation)
Time
Display
Stop
65
4
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