Mitsubishi Electric 800 Series Instruction Manual page 85

Basic operation procedure (PU operation)
4.2.3
Setting the frequency with analog signals
(voltage input)
POINT POINT
• Use the operation panel (
• Use the potentiometer (frequency setting potentiometer) to give a frequency command (by connecting it across terminals 2
and 5 (voltage input)).
• Set Pr.79 Operation mode selection = "4" (External/PU combination operation mode 2).
[Connection diagram] (The inverter supplies 5 V power to the frequency setting potentiometer (terminal 10).)
Operation example
Screen at power-ON
1.
The monitor display appears.
Changing the operation mode
2.
Set "4" in
Pr.79. [PU+E] indicator is on.
Start
3.
Press or
Acceleration → constant speed
4.
Turn the potentiometer (frequency setting potentiometer) clockwise slowly to full. The frequency value on the indication
increases in Pr.7 Acceleration time, and "60.00 Hz" appears.
Deceleration
5.
Turn the potentiometer (frequency setting potentiometer) counterclockwise slowly to full. The frequency value on the
indication decreases in Pr.8 Deceleration time, and the motor stops rotating with "0.00 Hz" displayed.
Stop
6.
Press . [FWD] or [REV] indicator turns OFF.
NOTE
• To change the frequency (60 Hz) at the maximum voltage input (initial value 5 V), adjust Pr.125 Terminal 2 frequency
setting gain frequency.
• To change the frequency (0 Hz) at the minimum voltage input (initial value 0 V), adjust the Pr.902 Terminal 2 frequency
setting bias frequency.
• When terminal 10 is used, the maximum output frequency may fluctuate in a range of ±6 Hz due to fluctuations in the output
voltage (5 ±0.5 VDC). Use Pr.125 to adjust the output frequency at the maximum analog input as required. (Refer to
402.)
• When terminal 10E is used, the maximum output frequency may fluctuate (in a range of ±2 to 3 Hz) due to fluctuations in the
output voltage (10 ±0.4 VDC). Use Pr.125 to adjust the output frequency at the maximum analog input as required. (Refer to
page 402.)
Parameters referred to
Pr.7 Acceleration time, Pr.8 Deceleration time
Pr.79 Operation mode selection
Pr.125 Terminal 2 frequency setting gain frequency
Pr.902 Terminal 2 frequency setting bias frequency
84
BASIC OPERATION
or
Frequency setting
potentiometer
Potentiometer
Operate at 60 Hz.
. [FWD] or [REV] indicator is on.
page 269
page 291
page 402
page 402
)
to give a start command.
Inverter
Operation panel
10
2
5
Operation
page