Setting The Frequency By Analog Input (Current Input) - Mitsubishi Electric FR-A720-0.4K Instruction Manual

Start/stop using the operation panel (PU
operation)
3.3.5

Setting the frequency by analog input (current input)

POINT
· Use or on the operation panel (FR-DU07) to give a start command.
· Use the current signal source (4 to 20mA) to give a frequency command (by connecting between terminals 4
and 5 (current input)).
· Turn the AU signal ON.
· Set "4" (External/PU combination operation mode 2) in Pr. 79 Operation mode selection.
[Connection diagram]
Operation example Performing operation at 60Hz.
Screen at power-ON
1.
The monitor display appears.
Operation mode change
2.
Set "4" in Pr. 79. [PU] indicator and [EXT] indicator are lit. (
Start
3.
Check that the terminal 4 input selection signal (AU) is ON. Press
frequency command is given.
Acceleration constant speed
4.
Perform 20mA input. The frequency on the indicator increases by the Pr. 7 Acceleration time and "
appears.
Deceleration
5.
Input 4mA or less. The frequency on the indicator decreases by the Pr. 8 Deceleration time, and the motor stops rotating
with " " (0.00Hz) displayed on the indicator. [FWD] indicator or [REV] indicator flickers.
Stop
6.
Press . [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
Change the frequency (60Hz) at the maximum value of potentiometer (at 20mA, initial value)
Adjust the frequency in Pr. 126 Terminal 4 frequency setting gain frequency. (Refer to page 92.)
Change the frequency (0Hz) at the minimum value of potentiometer (at 4mA, initial value)
Adjust the frequency in calibration parameter C5 Terminal 4 frequency setting bias frequency. (Refer to
Chapter 4 of
86
AU
AU signal
SD
Current signal 4 (+)
source
5 (-)
(4 to 20mADC)
the Instruction Manual (Applied).)
Inverter
Operation panel
(FR-DU07)
Operation
Refer to page 53 to change the setting.)
or . [FWD] or [REV] is flickering as no
" (60.00Hz)
the Instruction Manual (Applied).)