Mitsubishi Electric 800 Series Instruction Manual page 84

4.2.2
Setting the frequency by switches (multi-speed
setting)
POINT POINT
• Use the operation panel (
• 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]
High speed
Middle speed
Low speed
Switch
Operation example Operate at a low-speed (10 Hz).
Screen at power-ON
1.
The monitor display appears.
Changing the operation mode
2.
Set "4" in Pr.79. [PU+E] indicator is on.
Setting the frequency
3.
Turn ON the low-speed switch (RL).
Start → acceleration → constant speed
4.
Press or
"10.00 Hz" appears.
Deceleration → stop
5.
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).
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)
Pr.7 Acceleration time, Pr.8 Deceleration time
Pr.79 Operation mode selection
or ) to give a start command.
Inverter
RH
Operation panel
RM
RL
SD
to start running. The frequency value on the indication increases in Pr.7 Acceleration time, and
page 314
page 269
page 291
Basic operation procedure (PU operation)
Speed 1
(High speed)
ON
RH
RM
RL
Operation
Speed 2
(Middle speed)
Speed 3
(Low speed)
Time
ON
ON
BASIC OPERATION
4
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