Setting The Frequency With Switches (Multi-Speed Setting) - Mitsubishi Electric FR-A820-00046 Instruction Manual

Basic operation procedure (External operation)
4.6.2

Setting the frequency with switches (multi-speed setting)

NOTES Turn 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
Switch
Fig. 4-9:
Example Operation example: Operate at a high-speed (60 Hz).
Turning ON the power of the inverter
The monitor display turns ON.
Setting the frequency
Turn ON the high-speed switch (RH).
Start ➔ acceleration ➔ constant speed
Turn ON the start switch (STF or STR). The frequency value indicated on the display increases for the time set in Pr. 7
"Acceleration time", and is fixed at "
and [REV] indicator turns ON during the reverse rotation.
Deceleration ➔ stop
Turn OFF the start switch (STF or STR).The frequency value indicated on the display decreases for the time set in Pr. 8
"Deceleration time", and the motor stops rotating at "
the high-speed switch (RH).
Tab. 4-16:
When the RM switch is turned ON, "30 Hz" is displayed. When the RL switch is turned ON, "10 Hz"
is displayed.
NOTES When both the forward rotation switch (STF) and the reverse rotation switch (STR) are turned ON,
the motor cannot be started. If both are turned ON while the motor is running, the motor deceler-
ates to a stop.
Terminal RH is initially set to 60 Hz for the FM type inverter, and to 50 Hz for the CA type inverter.
Terminal RM is set to 30 Hz, and terminal RL is set to 10 Hz. (To change the frequencies, set Pr. 4, Pr.
5, and Pr. 6.)
In the initial setting, when two or more of multi-speed settings are simultaneously selected, prior-
ity 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.
Up to 15-speed operation can be performed.
4 - 24
Forward rotation start
Reverse rotation start
High speed
Middle speed
Low speed
Multi-speed setting in dependence on the terminals
Operate the inverter by using external signals
Inverter
STF
STR
RH
RM
RL
PC
Operation
" (60.00 Hz) . [FWD] indicator turns ON during the forward rotation,
" (0.00 Hz). [FWD] or [REV] indicator turns OFF. Turn OFF
Basic operation
Speed 1 (High speed)
Speed 2
(Middle speed)
Speed 3
(Low speed)
Time
ON
RH
ON
RM
ON
RL
I002436E_G, I002444E