102
4. BASIC OPERATION
4.3 Basic operation procedure (External operation)
4.3.5 Using an analog signal (current input) to give a frequency
command
• Switch ON the STF (STR) signal to give a start command.
• Turn ON the AU signal.
•Set Pr.79 Operation mode selection="2" (External operation mode).
[Connection diagram]
The following shows the procedure to operate at 60 Hz.
1. Screen at power-ON
The monitor display appears.
2. Terminal 4 input selection
Turn ON the terminal 4 input selection signal (AU). Input to the terminal 4 is enabled.
3. Start
Turn ON the start switch (STF or STR). [STF] or [STR] indicator is on.
4. Acceleration → constant speed
Input 20 mA. The frequency value on the indication increases in Pr.7 Acceleration time, and "60.00 Hz" appears.
[FWD] indicator is on during the forward rotation, and [REV] indicator is on during the reverse rotation.
5. Deceleration
Input 4 mA or less. The frequency value on the indication decreases in Pr.8 Deceleration time, and the motor stops
rotating with "0.00 Hz" displayed. [FWD] or [REV] indicator flickers.
6. Stop
Turn OFF the start switch (STF or STR). [STF] or [STR] indicator turns OFF.
• When both the forward rotation switch (STF) and the reverse rotation switch (STR) are ON, the motor cannot be started.
If both are turned ON while the inverter is running, the inverter decelerates to a stop.
• Pr.184 AU terminal function selection must be set to "4" (AU signal) (initial value).
Pr.7 Acceleration time, Pr.8 Deceleration time page 190
Pr.184 AU terminal function selection page 343
Inverter
Switch
5(-)
4(+)
Forward rotation start
Reverse rotation start
STF
STR
SD
AU
Current signal
source
(4 to 20 mADC)
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