Basic Operation Procedure (External Operation) - Mitsubishi Electric 800 Series Instruction Manual (Function

2.6

Basic operation procedure (External operation)

Select a method to give the frequency command from the list below, and refer to the specified page for its procedure.
Setting the frequency on the operation panel in the frequency setting mode
Turning ON/OFF switches wired to inverter's terminals (multi-speed setting)
Setting the frequency by inputting voltage signals
Setting the frequency by inputting current signals
2.6.1 Setting the frequency on the operation panel
• Turn ON the STF/STR signal to give a start command.
• Use operation panel (setting dial or UP/DOWN key) to give a frequency command.
• Set Pr.79 = "3" (External/PU combined operation mode 1).
[Connection diagram]
Forward rotation
start
Reverse rotation
start
Switch
The following shows the procedure to operate at 30 Hz.
Operating procedure
1.
Changing the operation mode
Set "3" in Pr.79. The PU LED and EXT LED turn ON. (To change the setting, refer to
2.
Setting the frequency
Turn the setting dial or press the UP/DOWN key until the target frequency "30.00" (30.00 Hz) appears. The indication
blinks for about 5 seconds.
While the value is blinking, press the SET key to enter the frequency. "F" and "30.00" are displayed alternately. After
about 3 seconds of alternate display, the indication returns to "0.00" (the indication of a monitored value). (If the SET
key is not pressed, the indication of the value returns to "0.00" (0.00 Hz) after about 5 seconds of blinking. In that
case, turn the setting dial or press the UP/DOWN key and set the frequency again.)
3.
Start → acceleration → constant speed
Turn ON the start switch (STF/STR signal). The frequency value on the monitor increases according to the setting
of Pr.7 Acceleration time, and "30.00" (30.00 Hz) appears on the monitor. The RUN LED is ON during forward
rotation and blinks slowly during reverse rotation. (To change the set frequency, return to step 2. The previously set
frequency appears.)
4.
Deceleration → stop
Turn OFF the start switch (STF/STR signal). The frequency value on the monitor decreases according to the setting
of Pr.8 Deceleration time, "0.00" (0.00 Hz) appears on the monitor, and the motor stops rotating.
42
2. Basic Operation
2.6 Basic operation procedure (External operation)
Method to give the frequency command
Inverter
STF
STR
SD
Operation panel
Refer to page
42
43
44
46
page 30.)