Mitsubishi FR-A800

Basic operation procedure (PU operation)
BASIC OPERATION
111
4
4.5.5 Using an analog signal (current input) to give a
frequency command
POINTPOINT
• Use the operation panel (FR-DU08) ( or) to give a start command.
• Use the outputs from the current signal source (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]
NOTE
• Pr.184 AU terminal function selection must be set to "4" (AU signal) (initial value).
• 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 time page 285
Pr.79 Operation mode selection page 306
Pr.126 Terminal 4 frequency setting gain frequency page 415
Pr.184 AU terminal function selection? page 430
C5(Pr.904) Terminal 4 frequency setting bias frequency page 415
Operation example Operate at 60 Hz.
Operation
1.
Screen at power-ON
The monitor display appears.
2.
Changing the operation mode
Set "4" in
Pr.79. [PU] and [EXT] indicators are on. (For setting value change, refer to page 101.)
3.
Terminal 4 input selection
Turn ON the terminal 4 input selection signal (AU). Input to the terminal 4 is enabled.
4.
Start
Press or . [FWD] or [REV] flickers as no frequency command is given.
5.
Acceleration  constant speed
Input 20 mA. The frequency value on the indication increases in Pr.7 Acceleration time, and " " (60.00 Hz)
appears.
6.
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.
7.
Stop
Press . [FWD] or [REV] indicator turns OFF.
Inverter
Operation panel
(FR-DU08)
Current signal
source
(4 to 20mADC)
5(-)
4(+)
SD
AU
A
U signal