Mitsubishi Electric 800 Series, Instruction Manual, Page: 84 / 727

Basic operation procedure (PU operation)
BASIC OPERATION
83
4
4.2.2
Setting the frequency by switches (multi-speed
setting)
POINT POINT
• Use the operation panel ( or ) to give a start command.
• Turn ON the RH, RM, or RL signal to give a frequency command. (multi-speed setting)
• Set
Pr.79 Operation mode selection ="4" (External/PU combination operation mode 2).
[Connection diagram]
NOTE
• The terminal RH is initially set to 60 Hz. The terminal RM is set to 30 Hz, and the RL is set to 10 Hz. (To change, set Pr.4,
Pr.5, and Pr.6 .)
• In the initial setting, when two or more of multi-speed settings are simultaneously selected, priority is given to the set
frequency of the lower signal.
For example, when RH and RM signals turn ON, RM signal (
Pr.5 ) has a higher priority.
• Maximum of 15-speed operation can be performed.
Parameters referred to
Pr.4 to Pr.6 (Multi-speed setting) page 314
Pr.7 Acceleration time, Pr.8 Deceleration time page 269
Pr.79 Operation mode selection page 291
Operation example Operate at a low-speed (10 Hz).
Operation
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.
Setting the frequency
Turn ON the low-speed switch (RL).
4.
Start → acceleration → constant speed
Press or to start running. The frequency value on the indication increases in Pr.7 Acceleration time , and
"10.00 Hz" appears.
5.
Deceleration → stop
Press to stop. The frequency value on the indication decreases in Pr.8 Deceleration time, and the motor stops
rotating with "0.00 Hz" displayed. Turn OFF the low-speed switch (RL).
Inverter
High speed
Middle speed
Low speed
SD
RH
RM
RL
Operation panel
Switch
ON
ON
ON
Output frequency (Hz)
Speed 1
(High speed)
Speed 2
(Middle speed)
Speed 3
(Low speed)
Time
RH
RM
RL