Start And Stop Using Terminals (External Operation); Setting The Frequency By The Operation Panel (Pr. 79 = 3) - Mitsubishi Electric FR-A720-0.4K Instruction Manual

3.4 Start and stop using terminals (External operation)

POINT
From where is the frequency command given?
· Operation at the frequency set in the frequency setting mode of the operation panel → Refer to 3.4.1 (Refer to page 87)
· Give a frequency command by switch (multi-speed setting) → Refer to 3.4.2 (Refer to page 88)
· Perform frequency setting
· Perform frequency setting
3.4.1

Setting the frequency by the operation panel (Pr. 79 = 3)

POINT
· Switch ON the STF (STR) signal to give a start command.
· Use ( ) on the operation panel (FR-DU07) to give a frequency command.
· Set "3" (External/PU combination operation mode 1) in Pr. 79 Operation mode selection.
Operation example Performing operation at 30Hz.
Screen at power-ON
1.
The monitor display appears.
Operation mode change
2.
Set "3" in Pr. 79. [PU] indicator and [EXT] indicator are lit. (
Frequency setting
Turn to show the selected frequency, "
While the value is flickering, press
3.
After about 3s of flickering of the value, the indicator goes back to "
(If you do not press
turn again, and set the frequency.)
Start acceleration
Turn ON the start switch (STF or STR). The frequency on the indicator increases by the Pr. 7 Acceleration time, and
4.
" " (30.00Hz) appears. [FWD] indicator is lit during forward rotation, and [REV] indicator is lit during reverse
rotation. (To change the set frequency, perform the operation in above step 3. Starting from the previously set frequency.)
Deceleration stop
5.
Turn OFF the start switch (STF or STR). The frequency on the indicator decreases by the Pr. 8 Deceleration time, and the
motor stops rotating with "
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
· Pr. 178 STF terminal function selection must be set to "60" (or Pr. 179 STR terminal function selection must be set to "61").
(all are initial values)
· When Pr. 79 Operation mode selection is set to "3", multi-speed operation (refer to page 88) is also valid.
When the inverter is stopped by
displayed alternately.
1. Turn the start switch (STF or STR) OFF.
2. The display can be reset by
using voltage input signal
using current input signal
[Connection diagram]
Forward rotation
start
Reverse rotation
start
Switch
to set the frequency. " " and "
, the value flickers for about 5s and the display then returns to
constant speed
" (0.00Hz) displayed on the indicator.
of the operation panel (FR-DU07),
.
Start and stop using terminals (External
→ Refer to 3.4.3 (Refer to page 89)
→ Refer to 3.4.5 (Refer to page 91)
Inverter
STF
STR
SD
Operation panel
(FR-DU07)
Operation
Refer to page 53
to change the setting.)
" (30.00Hz). The frequency flickers for about 5s.
" flicker alternately.
" (monitor display).
operation)
(display) Hz. In that case,
and are
Flickering
87
3