6 Before Starting Positioning Operation
6.3 System Wiring
30
FX3U-1PG User's Manual
6.3 System Wiring
6.3.1 System wiring example
Set the system wiring of the FX3U/FX3UC series PLC, FX3U-1PG, and the servo amplifier as below.
System wiring example
• Wire the limit switches to the PLC and the servo amplifier, with the inner limit switch connected to the PLC
and the outer limit switch connected to the servo amplifier.
• Wire the Forced stop signal to the servo amplifier.
• Wire the DOG switch to the FX
3U-1PG.
• Wire the Start signal for the positioning operation to the PLC.
• Wire the STOP signal for the positioning operation to the PLC or to the FX
3U-1PG.
• Wire the INT0 (interrupt input 0) and the INT1 (interrupt input 1) for the positioning operation to the PLC.
6.3.2 For DOG terminal, STOP terminal
In each operation mode, various inputs are connected to the DOG terminal and the STOP terminal.
The DOG terminal is used for the DOG input for the mechanical zero return operation, and for the interrupt
input 0 for the external command positioning operation, the interrupt 1-speed positioning operation, the
interrupt stop operation, and the interrupt 2-speed positioning operation.
The STOP terminal is used for the decelerate stop input, the external command positioning operation, and the
interrupt input 1 for the interrupt 2-speed positioning operation. In addition, ON/OFF polarities of these inputs
invert depending on the setting of the DOG input polarity (b12) and the STOP input polarity (b14) of BFM#3/
BFM#37.
Examples of connections which express the above description are shown below.
Operation mode selection indicates the operation mode to be used. Interrupt signal indicates the signals used
in the given operation mode.
PLC
(FX
3U
/FX
3UC
)
FX
3U
-1PG
Servo amplifier
Start INT1INT0 STOP Forced stop
Limit switch
(Servo amplifier)
Limit switch
(PLC)
Limit switch
(Servo amplifier)
LSPLSN
X**
STOP
DOG
X**
X** EMC
Limit switch
(PLC)
DOG switch
Motor
X**X**
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