Mitsubishi FX3U Series Programming Manual

789
FX3G/FX3U/FX3GC/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
35 SFC Program and Step Ladder
35.2 Step Ladder
31
FNC276-FNC279 Data Transfer 3
32
FNC280-FNC289 High-Speed Processing 2
33
FNC290-FNC299 Extension File Register
34
FNC300-FNC305 FX
3U
-CF-ADP
35
SFC•STL Programming
36
Interrupt Function
37
Special Device
38
Error Code
A
Version Up Information
B
Execution Times
Examples of flows with selective branches and recombination
1. Example of selecting and carrying large and small balls
The figure below shows a mechanism which selects and carries large and small balls using conveyors.
The upper left position is regarded as the origin, and the mechanism performs in the order “moving down → suction →
moving up → moving rightward → moving down → release → moving up → moving leftward.”
When the arm moves down and the electromagnet pushes a large ball, the lower limit switch LS2 turns OFF. When
the electromagnet pushes a small ball, LS2 turns ON.
+
M
+
Small Large
X004
LS4
X005
LS5
X001
LS1 Left limit
X003
LS3 Upper
limit
Origin
indication
Y007
Moving
rightward:
Y003
Moving
leftward:
Y004
Moving up:
Y002
Moving down:
Y000
CY1
X002
LS2 Lower limit
When a large ball is pushed, the piston does
not reach the lower limit and X002 does not
turn ON.
Proximity
switch
PS0
X000
Electromagnet
Y001
X026
Start

Mitsubishi FX3U Series Specifications

General

Model	FX3U Series
Program Memory	64k steps
Execution Speed	0.065 μs/basic instruction
Type	PLC (Programmable Logic Controller)
Power Supply	100-240V AC
I/O Points	Up to 384
Communication	USB
Expansion	Supported via expansion modules
High-Speed Counters	Up to 6 channels
Analog Input/Output	Available via expansion modules
Temperature Range	0 to 55°C
Programming Language	Ladder Logic, Structured Text
Built-in Functions	PID control
Humidity	5 to 95% (non-condensing)