Mitsubishi Electric FR-A800, Instruction Manual

Page: 164 / 1042

Basic operation procedure (PU operation) Basic operation
4 - 16
4.5.3 Setting the frequency by switches (multi-speed setting)
Connection diagram
쑶
NOTES Use the operation panel (FR-DU08) (FWD or REV key) 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).
I002437E, I002435E
Fig. 4-5: Multi-speed selection by external terminals
Example
쑴
Operation example: Operate at a low-speed (10 Hz).
Operation
Screen at power-ON
The monitor display appears.
Changing the operation mode
Set "4" in Pr. 79. [PU] and [EXT] indicators are lit. (For setting value change, refer to page 4-9.)
Setting the frequency
Turn ON the low-speed switch (RL).
#
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.
,
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).
Tab. 4-12: Operate the inverter by using multi-speed setting
SD
RH
RM
RL
RH
RM
RL
Operation panel
(FR-DU08)
Inverter
High speed
Middle speed
Low speed
Switch
Speed 1 (High speed)
Speed 2
(Middle speed)
Speed 3
(Low speed)
Time
ON
ON
ON
Ou
tput fr
equenc
y [H
z]