E6581531
G-3
7
3) Connection with transistor output
+
The inverter can be controlled by connecting
the input terminal with output (contactless
switch) of a programmable controller. Use this
function to specify forward/reverse run or a
preset speed operation. Use a transistor that
operates on 24Vdc, 5mA power.
CC
Input terminal
Inverter
Programmable controller
* Interface between programmable controller and inverter
When using an open-collector output type programmable control device to control the operation of a motor, connect
cables, as shown in the schematic diagram for sink/source logic (when an external power supply is used) on page
B-15. When using the internal power supply of the inverter, connect cables, as shown in the schematic diagram on
page B-14. If the programmable control device is turned off with the inverter left on, an incorrect signal will flow into
the inverter, as shown in the figure below, because there is a potential difference between the control power
supplies. Be sure to provide an interlock so that the programmable controller cannot be turned off when the inverter
is on.
Ex24V
power supply
P24
COM
Fuse
Fuse blowout
detector circuit
Inverter internal
+24V power
supply
+24V
Programmable controller
Inverter
Input terminal
(F, R….)
Example of use- three-wire operation
The three-wire operation function allows you to make the inverter self-hold its operation, without setting up a
sequential circuit, so that the inverter can be operated by means of external signals (reset contact signals).
F
CC
S3
Revers run
HD
Forward run (F):
If you press the Forward (F) button, the
motor rotates in the forward direction at the
frequency specified with a command.
Revers run (R):
If you press the Reverse (R) button, the
motor rotates in the reverse direction at the
frequency specified with a command.
HD (S3):
If you press the HD (S3) button, the motor
decelerates and comes to a stop.
R
Forward run
[Parameter setting]
Terminal
symbol
Title
Function
Adjustment range
Example of setting
S3
H
Input terminal function
selection 7(S3)
~
( HD operation retention)