Mitsubishi Electric 800 Series Instruction Manual page 93

4.2.3 Setting the frequency with analog signals (voltage input)
• 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).)
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.
Start
Press
4.
Acceleration → constant speed
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.
5.
Deceleration
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.
6.
Stop
Press
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 or Pr.903 to adjust the output frequency at the maximum analog input as required. (Refer
to page 328.)
• 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 or Pr.903 to adjust the output frequency at the maximum analog input as
required. (Refer to
92
4. BASIC OPERATION
4.2 Basic operation procedure (PU operation)
Frequency setting
potentiometer
Potentiometer
or . [FWD] or [REV] indicator is on.
. [FWD] or [REV] indicator turns OFF.
page 328.)
or ) to give a start command.
Inverter
10
2
5
Operation panel