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Start/stop using terminals (External
operation)
4
DRIVING THE MOTOR
4.5.6 Setting the frequency by analog input (current input)
[Connection diagram]
POINT
· Switch ON the STF (STR) signal to give a start command.
· Switch ON the AU signal.
· Set "2" (External operation mode) in Pr. 79 Operation mode selection.
Operation example
Performing operation at 60Hz.
Operation Display
1. Screen at power-ON
The monitor display appears.
2. Start
Check that the terminal 4 input selection signal (AU) is ON.
Turn the start switch (STF or STR) ON.
[FWD] or [REV] is flickering as no frequency
3. Acceleration → constant speed
Perform 20mA input.
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.
4. Deceleration
Input 4mA or less.
The frequency on the display decreases in the Pr. 8 Deceleration
time setting, and the motor stops rotating with " " (0.00Hz)
displayed.
[FWD] indicator or [EXT] indicator flickers.
5. Stop
Turn the start switch (STF or STR) OFF.
[FWD] indicator or [REV] indicator turns OFF.
REMARKS
Pr. 184 AU terminal function selection must be set to "4" (AU signal) (initial value). (Refer to Chapter 4 of the Instruction Manual
(Applied).)
Inverter
5(-)
4(+)
Forward rotation start
Reverse rotation start
STF
STR
SD
AU
Current signal
source
(4 to 20mADC)
ON
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.
Forward
rotation
Reverse
rotation
ON
Flickering
Current signal
source
(20mADC)
Current signal
source
(4mADC)
Flickering
Stop
OFF
Forward
rotation
Reverse
rotation