Toshiba VF-PS1 Instruction Manual page 193

3) Connection with transistor output
Inverter
Input terminal
CC
* 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.
Programmable controller
Fuse blowout
detector circuit
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
R
S3
CC
[Parameter setting]
Terminal
Title
symbol
S3 
Programmable controller
External +24V
P24
power supply
COM
Fuse
Forward run (F):
Forward run
Revers run
Revers run (R):
HD
If you press the HD (S3) button, the motor
HD (S3):
decelerates and comes to a stop.
Function
Input terminal function
selection 7(S3)
G-3
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.
+24V
Input terminal
Inverter internal
(F, R....)
+24V power
supply
If you press the Forward (F) button, the
motor rotates in the forward direction at the
frequency specified with a command.
If you press the Reverse (R) button, the
motor rotates in the reverse direction at the
frequency specified with a command.
Adjustment range Example of setting
∼
( HD operation retention)
E6581386
Inverter
7
