Setting The Frequency Using An Analog Signal (Current Input) - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

4.5.5 Setting the frequency using an analog signal
(current input)
• Use or
• 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
AU signal
SD
Current signal
4(+)
source
5(-)
(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 or
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 . [FWD] or [REV] indicator turns OFF.
NOTE
• Pr.184 AU terminal function selection must be set to "4 (initial value)" (AU signal).
• To change the frequency (60 Hz) at the maximum current input (initial value: 20 mA), adjust Pr.126 Terminal 4 frequency
setting gain frequency.
• To change the frequency (0 Hz) at the minimum current input (initial value: 4 mA), adjust the calibration parameter C5
Terminal 4 frequency setting bias frequency.
Parameters referred to
Pr.7 Acceleration time, Pr.8 Deceleration
Pr.79 Operation mode selectionpage 370
Pr.126 Terminal 4 frequency setting gain
on the operation panel (FR-DU08) to give a start command.
Inverter
Operation panel
(FR-DU08)
. [FWD] or [REV] indicator blinks as no frequency command is given.
" (0.00 Hz), and the motor stops rotating. [FWD] or [REV] indicator
timepage 349
frequencypage 482
page
" (60.00 Hz) appears on the monitor.
4.5 Basic operation procedure (PU operation)
139.)
151
4. BASIC OPERATION
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