3 Comparison of Specifications
3.2 Comparison of Operation Modes
A - 20
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
PLC User's Manual - Positioning Control Edition
Common Items
Variable-speed operation
The operation will be per-
formed at the operation
speed specified by the PLC.
*7
*8
*9
*9
External Command
Positioning Operation
The operation starts at oper-
ation speed (1) by the start
command.
If interrupt input (1) turns ON
during operation, the speed
will decelerate to operation
speed (2).
The operation will continue at
operation speed (2) until
interrupt input (2) turns ON.
Linear interpolation
The workpiece will travel to
the target position at the
specified vector speed (inter-
polation operation).
*10
*11
Circular interpolation
The workpiece will travel to
the specified target position
(x, y) along an arc at the
specified circumferential
speed.
The center coordinate or
radius can be specified.
Table operation
A positioning control program
can be set with the table.
200
points,
maxi-
mum
100
points,
maxi-
mum
X-/Y-/
XY-
axis:
300
points,
maxi-
mum
*7. Variable speed pulse output instruction is used to perform this operation.
Operations with acceleration/deceleration are supported in the FX
3UC PLC Ver. 2.20 or later and
FX
3S/FX3G/FX3GC/FX3U PLC.
*8. "Without acceleration/deceleration" or "With acceleration/deceleration" can be selected in the
variable-speed operation acceleration/deceleration setting.
*9. Operates with acceleration/deceleration.
*10. When interpolation instructions are consecutively set in the program, it will immediately shift to the
next operation. (Continuous pass operation)
*11. When the interpolation operation is continuously set in the table operation, it will immediately shift to
the next operation. (Continuation pass function)
Positioning operation
pattern
Description
Built-in positioning function
FX
3S/FX3G/FX3GC/FX3U/
FX
3UC PLC (main unit)
(Transistor output)
FX
3U-2HSY-ADP (FX3U)
FX3U-1PG
FX2N-1PG(-E)
FX2N-10PG
FX2N-10GM
FX2N-20GM
FX3U-20SSC-H
Speed
Start Speed
change
Speed
change
Stop
Speed
Start
Interrupt
input(1)
Interrupt
input(2)
Operation
speed(1)
Operation
speed(2)
X-axis
Y-axis
Start point
Target
position (x, y)
x
y
CW
Start
point
Target position (x, y)
:cw Dotted line
Solid line
:ccw
Radius: r
Start point
CCW
Target
position
(x, y)
Radius: -r
No. Position Speed
•••
0 200 500
1 500 1000
2 1000 2000
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