Mitsubishi Electric 800 Series Instruction Manual page 99

4.3.2 Setting the frequency by switches (multi-speed setting)
(Pr.4 to Pr.6)
• Switch ON the STF (STR) signal to give a start command.
• Turn ON the RH, RM, or RL signal to give a frequency command. (Multi-speed setting)
[Connection diagram]
Forward rotation start
Reverse rotation start
High speed
Middle speed
Low speed
Switch
The following shows the procedure to operate at a high-speed (60 Hz).
Operating procedure
1.
Screen at power-ON
The monitor display appears.
2.
Setting the frequency
Turn ON the high-speed switch (RH).
3.
Start → acceleration → constant speed
Turn ON the start switch (STF or STR). The frequency value on the indication increases in Pr.7 Acceleration time,
and "60.00 Hz" appears. [FWD] indicator is on during the forward rotation, and [REV] indicator is on during the
reverse rotation.
•When RM is turned ON, 30 Hz is displayed. When RL is turned ON, 10 Hz is displayed.
4.
Deceleration → stop
Turn OFF the start switch (STF or STR). The frequency value on the indication decreases in Pr.8 Deceleration
time, and the motor stops rotating with "0.00 Hz" displayed. [FWD] or [REV] indicator turns OFF. Turn OFF the high-
speed switch (RH).
NOTE
• When both the forward rotation switch (STF) and the reverse rotation switch (STR) are ON, the motor cannot be started.
If both are turned ON while the inverter is running, the inverter decelerates to a stop.
• 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
98
4. BASIC OPERATION
4.3 Basic operation procedure (External operation)
Inverter
STF
STR
RH
RM
RL
SD
page 226
page 190
Speed 1
(High speed)
Speed 2
(Middle speed)
Speed 3
(Low speed)
Time
ON
RH
ON
RM
ON
RL