MGI M4000E series, Instruction Manual

Page: 68 / 215

57
3
OPERATION/CONTROL
3.3.2 External operation mode (Operation using the external
frequency setting potentiometer and external start signal)
(1) Operation at 60Hz
Operation command: Externally connected start signal
Frequency setting
: Externally connected frequency setting potentiometer
<Connection diagram>
Refer to page 18 for details of each terminal.
<Reference> If other frequency is required at fully clockwise position, change Pr. 38 "frequency
at 5V (10V)", Pr.39 "frequency at 20mA input" setting. (Refer to page 89.)
Step Description Image
1
Power on → Operation mode check
With the factory setting, the external operation mode is
selected and the [EXT] indication is lit when power is switched
on. If the [EXT] indication is not lit, refer to page 52 and set "2"
in Pr. 79.
2
Start
Set the start switch (STF or STR) to ON.
The [RUN] indication is lit to indicate forward rotation, or
flickers to indicate reverse rotation.
Note: The motor does not start if both the forward and
reverse rotation switches are turned on. If both
switches are turned on during operation, the motor
decelerates to a stop.
3
Acceleration → Constant speed
Slowly turn the potentiometer connected across terminals 2-5
(4-5) (frequency setting potentiometer) fully clockwise.
The frequency shown on the display increases gradually to
60.00Hz.
4
Deceleration
Slowly turn the potentiometer connected across terminals 2-5
(4-5) (frequency setting potentiometer) fully counterclockwise.
The frequency shown on the display decreases gradually to
0.00Hz.
The motor stops running.
5
Stop
Turn off the start switch (STF or STR).
AU *
5
4
STF
STR
SD
Frequency setting
potentiometer
0 to 10VDC
10
2
5
Inverter
STF
STR
SD
Frequency setting by current input Frequency setting by voltage input
4 to 20mADC
Current input
Inverter
*Short terminals AU-SD for
current input.
Use Pr.180 to Pr.183 (input
terminal function selection) to
assign the function of AU to any
of RL, RM, RH or MRS terminal.
ON
Hz
MON
EXT
Hz RUN
MON
EXT
Forward rotation
Reverse
rotation
External potentiometer
External potentiometer
OFF
Forward rotation
Stop
Reverse
rotation
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