Setting The Frequency Using An Analog Signal (Current Input) - Mitsubishi Electric FR-A800 Series Instruction Manual

Parameters referred to
Pr.7 Acceleration time, Pr.8 Deceleration
Pr.79 Operation mode
Pr.125 Terminal 2 frequency setting gain
C2(Pr.902) Terminal 2 frequency setting bias
4.5.5
• Use
• Use the current regulator which outputs 4 to 20 mA to give a frequency command (by connecting it across terminals 4 and 5
(current input)).
• Turn ON the AU signal.
• Set Pr.79 Operation mode selection = "4" (External/PU combination operation mode 2).
[Connection diagram]
AU signal
Current signal
source
(4 to 20mADC)
The following shows the procedure to operate at 60 Hz.
Operating procedure
1.
Turning ON the power of the inverter
The operation panel is in the monitor mode.
2.
Changing the operation mode
Set "4" in Pr.79. [PU] and [EXT] indicators are ON. (To change the setting, refer to
3.
Selecting the input via terminal 4
Turn ON the Terminal 4 input selection (AU) signal. Input via terminal 4 to the inverter is enabled.
4.
Start
Press
5.
Acceleration → constant speed
Input a current of 20 mA to the inverter from the regulator. The frequency value on the monitor increases according
to the setting of Pr.7 Acceleration time, and "
6.
Deceleration
Input a current of 4 mA or less. The frequency value on the monitor decreases according to the setting of Pr.8
Deceleration time, the monitor displays "
blinks.
7.
Stop
Press
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timepage 367
selectionpage 389
frequencypage 505
frequencypage 505
Setting the frequency using an analog signal
(current input)
or on the operation panel (FR-DU08) to give a start command.
Inverter
AU
SD
4(+)
5(-)
or . [FWD] or [REV] indicator blinks as no frequency command is given.
. [FWD] or [REV] indicator turns OFF.
search engine
Operation panel
(FR-DU08)
" (60.00 Hz) appears on the monitor.
" (0.00 Hz), and the motor stops rotating. [FWD] or [REV] indicator
page 142.)
4. BASIC OPERATION
4.5 Basic operation procedure (PU operation)
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