Operation By Pushbutton (Momentary Switch) Input - Hitachi WJ Series User Manual

Chapter 9
9.1.4

Operation by Pushbutton (Momentary Switch) Input

 How to operate the inverter using a terminal input signal?
Q
 How to start operation using a pushbutton switch?
 How to use the operation buttons as momentary instead of self-latching?
 To perform forward/reverse rotation and stop operation using 3-wire control function, set the
A
"RUN command input source selection [A002]
start [STA]", "3-wire stop [STP]", and "3-wire Forward/Reverse [F/R]" to "Input terminal function
[C001] to [C007]".
 When the [STP] terminal is ON, operation is started by a rising-edge input on the [STA] terminal.
Turning off the [STP] terminal while the inverter is running will stop the operation.
 The "3-wire stop [STP]" terminal is fixed to the "b" (NC) contact input state regardless of the a/b
(NO/NC) setting for the corresponding terminal number.
 When the "3-wire stop [STP]" terminal is assigned, the "Forward rotation [FW]"/"Reverse rotation
[RV]" terminals are disabled.
■ Example of terminal assignment and operation when using the 3-wire control function
Input terminal
4 3
[F/R]
This example shows a terminal assignment
consisting of Terminal 1 = [STA], Terminal 2 = [STP],
and Terminal 3 = [F/R].
Code
RUN command input
[A002] *1
source selection
[C001]
Input terminal
to
function
[C007]
 For the inverter to start operation, a frequency command is required in addition to a RUN
!
command.
 By setting the "RUN command input source selection [A002]
reserved variables <STA>/<STP>/<F/R> of the program operation function EzSQ are enabled
and can also respond to commands.
*1. "2nd-motor control [SET]" target parameter. The second control parameter is also subject to setting.
2 1
L
[STP] [STA]
Item
The [STA] and [STP] input terminals from the control circuit
terminal block are used to start and stop inverter operation.
3-wire start [STA]:
The start signal for the 3-wire control function.
Operation starts if [STA] is ON while [STP] is ON (circuit
is normally open due to the "b" contact state).
3-wire stop [STP]:
The stop signal for the 3-wire control function. It
switches to the "b" (NC) contact state during
assignment. The inverter stops when it is OFF state.
3-wire Forward/Reverse [F/R]:
OFF = Forward rotation, ON = Reverse rotation
*1
" to "Control terminal (01)" and assign "3-wire
STA
ON
STP
F/R
OFF
Forward
Output frequency
rotation
Description
*1
" to "Control terminal (01)", the
9-1-4
Inverter Functions
OFF
ON OFF
ON
Reverse
rotation
Data
01
20
21
22