Mitsubishi Electric 800 Series Instruction Manual page 95

4.2.4 Using an analog signal (current input) to give a frequency
command
• Use the operation panel (
• 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]
The following shows the procedure to operate at 60 Hz.
Operating procedure
1.
Screen at power-ON
The monitor display appears.
2.
Changing the operation mode
Set "4" in Pr.79. [PU+E] indicator is on.
3.
Terminal 4 input selection
Turn ON the terminal 4 input selection signal (AU). Input to the terminal 4 is enabled.
4.
Start
Press
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.
7.
Stop
Press
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 Pr.904 Terminal 4 frequency
setting bias frequency.
94
4. BASIC OPERATION
4.2 Basic operation procedure (PU operation)
AU signal
Current signal
source
(4 to 20 mADC)
or . [FWD] or [REV] indicator is on.
. [FWD] or [REV] indicator turns OFF.
or ) to give a start command.
Inverter
AU
Operation panel
SD
4(+)
5(-)